Strategic Human Resource Management. Performance-Related Pay Systems Essay

Strategic Human Resource Management. Performance-Related Pay Systems - Essay Example The paper tells that within a modern business environment, employers must balance the needs of the business with the requirements of the employees. Human Resource Management (HRM) is an important aspect of this, where employers organise and develop strategies for working with their employees. Many employees work inefficiently, as they have no desire to perform well for the company. This comes from the fact that what is good for the company is not necessarily the same as what is best for the employee. Businesses are generally aiming to make the highest profit possible, while employees are working for the money that they need to live. Performance-related pay is a system in which the company attempts to align the interests of the employees with the interests of the business, by providing employees with incentives to work hard. The exact form of the system differs substantially between different companies, with some offering commission-based pay, some paying employees a certain rate per unit produced and others paying based on team performance. There are many other variations of performance-based pay and it is a popular means of increasing overall output for a business. Performance-related pay is common in Britain and has been used for government employees as well as many large companies. However, despite the popularity of the system, current research is questioning whether performance-related pay is actually effective. Evidence suggests that this may be a mechanism that is useful in some circumstances, and counterproductive in others. The need for performance-related pay In the standard work environment, people work because they need the money, not because they have a strong loyalty for the company. While some individuals may strive to put in effort to make sure that they perform well and that they are an asset to the company, most are content with doing the minimum that is required of them. Because the success of the company does not directly affect their pay che ck, most people have no interest in how well the business does. Research suggests that compensation is the most effective driver of motivation, behaviour and attitude within the workplaces. While forms of compensation vary, money has been shown to be the most influential . Consequently, the money that employers pay their staff members plays a crucial role in maintaining relationships and the development of motivation. Pay is an essential component of the relationship between employer and employee. For the employer, it is an important component of the costs of the company and is used for bringing in new talent as well as maintaining the current labour force. For the employee, pay is used as a way of paying for living expenses, and also represents how valued he is by the employer. A person who receives a higher wage feels that what they do is important, and may put in more effort as a result. In contrast, people who feel that they are being underpaid often do not work hard, and tend t o have low morale which further decreases productivity. The traditional method of wage distribution has been non-performance-related, and pay increases have been related to a range of aspects, such as minimum wages, seniority, the cost of living or the need to retain staff. However, this system does not encourage skill development or employees to work at their maximum potential. Additionally, under this system pay rises were often associated with promotions. This can be difficult, as a person must be promoted in order to receive a pay rise and the number of positions present in a company is limited. Increasing an individual’s pay acts to reinforce positive behaviour, making it more likely that the behaviour will be repeated. Within a company, there are often many individuals that perform the same role, however they differ in terms of knowledge, experience and performance . For a business to remain competitive, it is important that their employees work to their maximum pot

Reflective Portfolio 05204 Essay Example | Topics and Well Written Essays - 3000 words

Reflective Portfolio 05204 - Essay Example The emergence of globalization has highly influenced various internationalisation strategies of organisation in terms of their international trading procedure. Various organisations have started to market their products within a global platform, it has become essential to analyse and select various internationalization strategies such as standardization or adaptation of the marketing mix (Hise and Choi, 2011). Schmid and Kotulla, (2011) have described that increase in technologies has created a union of culture and similarities in customer demands. Therefore, this situation has developed the practice of standardization of international trading. Standardization approach has assisted organisations to achieve economies of scale while efficiently monitoring the global communication. The standardization of international trading strategy of Coca-Cola Company has enabled the organisation to treat their different market as a single global platform (Newburry and Yakova, 2006). Gerpott and Jakopin (2005) have argued against the implementation of standardization by stating that this process provides little scope of flexibility and marketing effectiveness while it can generate negative reaction due to neglecting local requirements. Alternatively, adaptation of local market allows marketers to modify their marketing mix as per local specifications which provide them comparatively strong hold of the global market. Different successful organisations have considered both standardization and adaptation to increase their global marketing reputation. McDonald’s has utilized both these strategies which assist them to maintain their standard in terms of product line, advertising and customer management. This process has assisted them to focus on modifying their product ingredients and specifications as per local taste preferences (Karpiarz, et al., 2014). The increase in globalized economy has also

Mind the Gap Essay Example | Topics and Well Written Essays - 2500 words

Mind the Gap - Essay Example Table of contents Abstract 1. Introduction 2. ‘The Small and Medium- sized Enterprises’ 3. Financial crisis on SMEs’ capital structure 4. Sovereign debt crisis which affects the bank’s credit standards, credit margin, and funding conditions 5. Regulatory changes on policies that deal with bank lending activities 6. â€Å"The Federation of small Businesses† 7. Recommendation 1) Introduction â€Å"The Small and Medium- sized Enterprises† abbreviated as SMEs is defined by the European Commission as â€Å"an enterprise employing not more than 250 employees; having an annual turnover of not more than â‚ ¬50m and balance sheet assets of â‚ ¬43m; and that has less than 25 per cent of its capital.† However, SMEs are defined using three concepts and they include small, local, and single. They are small in nature when considering the number of employees, capital and assets, and turnover. They are also owned by a single owner who could only be the sole employee. SMEs are also local in nature because their markets are usually based on local areas or places of residence (Fielden, 2003). In the European Union, Small and Medium- sized Enterprises faces a number of issues in term of financing. These issues include effects of financial crisis on SMEs’ capital structure; the sovereign debt crisis impacts on bank’s credit standards, credit margin, and funding conditions; and the effects caused by comprehensive regulatory changes on policies dealing with bank lending activities. However, â€Å"The Federation of small Businesses† abbreviated as FSB, has come to rescue these SMEs by representing them in the issues for financial market (Ministry of defence, 2013). Its functions revolve around practices dealing with financial lending â€Å"of the small and medium-sized Enterprises.† 2) â€Å"The Small and Medium- sized Enterprises† The SMEs have been recognized as the key contributors of the econo my in the European Union, due to the way they have changed the union into a market oriented economy. Currently, statistics shows that 96% of the registered firms are recognized â€Å"as small and medium sized firms,† with SMEs accounting for approximately 82%. These small businesses actively contribute to 25% of the annual Global Domestic Product of the European Union (Villa, 2011). Despite their great contribution, SMEs are faced with financial crisis, cause by various factors hence affecting the capital structure. The financial sector within the European Union is characterized by a system based bank where SOCBs or state owned commercial banks play an important role. SOCBs provide 78 % of the overall loans in the economy, with half of its credits being channeled into SOEs. This, therefore, makes it difficult â€Å"for the small and medium size enterprises† to access bank loans. 3) Financial crisis on SMEs’ capital structure However, there are a number of factor s which leads to financial crisis that affects the SMEs capital structure. The first one is firm growth. It is suggested that firm’s growth is relatively negative to its capital structure. A SMEs’ information asymmetry may demand an extra premium for it to raise external funds, despite the true

LAW FOR BUSINESS Assignment Essay Example | Topics and Well Written Essays - 1250 words

LAW FOR BUSINESS Assignment - Essay Example This type of loss is mostly related with the economic benefits or profits of the claimant. Furthermore, the damages for pure economic losses are not recoverable in tort actions in the absence of the injury of personal nature and in the absence of personal property damage (Claim story, November 1998, p. 60, quoted as saying by Murphy and et. al, 1999). On the other hand, consequential economic loss is a type of economic loss that nearly or proximately results from the failure of the goods to work or function as warranted (Us legal). The examples of consequential economic loss are loss of business reputation, loss of goodwill and other types of loss that are created from the use and consumption of defective products and so on. How does the â€Å"floodgates† principle constrain the right of claimants to claim damages for pure economic loss in negligence?   Answer: The concept of floodgate is that the court will only make the defendant responsible and liable when it is appropria te and reasonable to do so in the public interest (Corporate and Business Law, 2007/08). Additionally, in order to satisfy the basic needs of this approach, some basic and fundamental conditions must be satisfied before going to use this approach for the purpose of claiming damages for pure economic loss in negligence. ... The loss of profit, wasted expenditure, loss of gain and so on are the examples of pure economic loss. Floodgates principles can constrain the right of claimant for the purpose of claiming damages for pure economic loss in negligence. If the claimant is unable to satisfy the basic and fundamental requirements given in the floodgate test, and even if the claimant becomes successful in proving any of the steps given in the floodgate test, he or she cannot be able to receive damages since all the components of floodgate test are not fully and totally satisfied as they should be. Donoghue v Stevenson (1932) Facts: Mrs Donoghue went to a cafe with a friend. She drank a bottle of ginger beer. She subsequently realised that there was a decomposed snail in the bottom of the opaque bottle. As a result, she suffered physical loss. She decided to sue the manufacturer, claiming that they were liable and under a duty to see such external and outside bodies did not get into the bottle of ginger be er. Held: There was a duty on the behalf of the manufacturer to take appropriate and reasonable care while manufacturing of these products. The manufacturer is under an obligation and duty to the consumer to take appropriate and reasonable care to stop and prevent injury. ‘You must take reasonable care to avoid acts or omissions which you can reasonably foresee would be likely to injure your neighbour’ (Lord Atkin as saying quoted by Corporate and Business Law, 2007/2008, pp.67). Negligence Negligence as a tort is a sort of breach of a legal duty to take care, which causes in damage to another (OUP). In order to satisfy the occurrence of negligence, three conditions must be satisfied. Without satisfying these basic and fundamental conditions, the event or incident of

Colony Collapse Disorder Case Study Example | Topics and Well Written Essays - 750 words

Colony Collapse Disorder - Case Study Example However, while the factors which cause this syndrome have been speculated upon for many years, there is yet to be a conclusive answer to the question of what is the cause of these disappearances. While this may be the case, ongoing research into the matter has come to show that there is a possible connection between the use of a diverse number of pesticides by farmers which may have a negative effect on bees because they cause their deaths. It is a fact that when the CCD takes place, scientists and bee farmers are never able to determine the cause of this disorder because of the fact that their occurrences tend to be so slow that they are barely noticed until it is too late. Because of this, it has become imperative that beehives in all the countries that are affected to be kept under constant observation so that the exact cause of the problem can be determined and in the process remedied. While it is a fact that the exact cause of CCD is not known, among the biggest suspects that have come to public notice has been the use of pesticides, which are believed to be contributing factors to the problem. Scientists state that the use of pesticides and possibly some fungicides may have been of lethal effect on bees, not killing them immediately but instead weakening their development and behaviour. Among the pesticides which have been of most interest to scientists studying CCD occurrences are the insecticides known as neonicoticoids, which contain chemicals that may have a negative effect on bees. These chemicals tend to be used in seed treatment in the process, they tend to work their way up through the plant into the latter’s flowers where they end up occurring in the nectar. As a result of the bees consuming the nectar containing chemicals from neonicoticoids over a long period of time, these chemicals, while not instantly lethal, may have other adverse effects on the bee population consuming them. It has been found that almost all the corn in the United States that has been genetically engineered contains some form of neonicoticoids, since the latter are used in their treatment. In addition to this, it has been found that these types of insecticides tend to occur in the soil of the fields near where the genetically modified corn has been planted (Vaughan & Black, 2008). Therefore, it has been speculated that these forms of insecticides may get consumed by bees indirectly through the plants which occur in such fields and this may, in fact, be a major cause of the CCD occurrence in bee populations. Scientists researching CCD have speculated that the use of antibiotics and miticides may have an effect on the sudden disappearances of bee populations. Research concerning this idea has been conducted extensively and many beekeepers who have been affected by CCD that have been interviewed have stated that they indeed make use of antibiotics and mi ticides among their bee colonies. The results of these investigations by scientists have, however, not been conclusive because of the fact that it is not known what specific antibiotics or miticides that are used may be the cause of the problem (Watanabe, 2008). The use of such chemicals has not been determined to be a definite cause of CCD because there tends to be a lack of uniformity concerning exactly what particular chemicals are used by beekeepers, hence doubts have been cast about whether only one

How people survive the work place political jungle Essay Example for Free

How people survive the work place political jungle Essay Distinguish between positive and negative corporate politics and explain how these can influence employment engagement. The essay will seek to distinguish between positive and negative corporate politics. The writer will start by defining corporate politics in trying to have an understanding of corporate politics and how it influence employee engagement Kakabadse (1983) cited by Armstrong defines politics as ‘a process, that of influencing individuals and groups of people to your point of view, where you cannot rely on authority’. Organizations consist of individuals who, while they are ostensibly there to achieve a common purpose, are, at the same time, driven by their own needs to achieve their own goals (Armstrong, 2009). There is significant difference between corporate politics and negative corporate politics. This can seen from the effect the two have on employee engagement and the purpose of the individual that is to say positive corporate politics is done as tool mainly by management and supervisors to try and influence other staff so as to meet organisational goals. Positive corporate politics is normal done to the benefit of the organisation as a whole. On the other hand negative corporate politics is self fulfilling it is aimed achieving self interests and in most cases it is against organisational goals Positive corporate politics include the process of influencing individual endeavour and ambition to the common good. Some individuals genuinely believe that using political means to achieve their goals will benefit the organization as well as themselves. Positive corporate politics can thus illustrated in the following case; Mrs Takuta is the Personnel at ZTRD Development Bank and is deputised by Taurai who she went to the same University and the two were in the same class. Taurai was more intelligent than his supervisor and because of the relation between the two, Mrs Takuta always find it difficult to give Taurai orders and in extreme situations taurai will challenge his boss. In the quest to have work done through her junior, Mrs Takuta wi ll use the following statement â€Å"the HR Manager wants the report done by the end of the day†. Mrs Takuta would use the HR Manager’s authority to influence Taurai to perform his duties. To the same effect, Positive corporate politics can increase efficiency, form interpersonal relationships, expedite change, and profit the organization and its members simultaneously. This can be achieved if those in power are able to use their power to influence members of staff to this effect. Thus  positive corporate politics would also include the different powers vested in them to influence positive employee engagement and increase in productivity. Management can give their employees the power to make decisions about their jobs – flexible autonomy, reward for good performance among others. Positive corporate politics involves action by individuals or groups to acquire develop and use power and other resources in order to obtain preferred outcomes (Hellriegel, Slocum and Woodman, 1995) Armstrong (2009) defines power as the capacity to secure the dominance of one’s goa ls or value over others. Individuals and managers can thus influence directly and indirectly using the various types of powers. French and Raven (1959) cited by Armstrong identified the four different types of powers that can be used to influence other employees and the power are; reward power, coercive power, expert power and legitimate power. Reward power is when individuals and managers use the reward power to influence or obtain compliance from subordinates by promising or granting rewards that includes salary increase, bonuses or even promotions. It is the management who normal use this power positively to achieve company goals. Coercive power is used to obtain compliance through threats of punishment and actual punishment. For example promising to fire an employee if they use company vehicles for personal use. The ability to influence others with the power anchored in one’s formal position of authority thus the legitimate power. Individuals can use their legitimate positions of authority to get things done through others. Legitimate power focuses constructively on job performance. Expert power is when individuals have influence because of the valueable information or knowledge they posses. The supervisor’s power is enhanced because they know about work schedules and assignments before their subordinates. Corporate politics involves struggles between social entities for resources, personal conflict and a variety of influence tactics executed by individuals and groups to obtain benefits and goals in different ways (Molm 1997) cited by Vigoda, (2000). Molm’s view of corporate politics would to a greater extent reflect negative corporate politics. Ferris, Russ, and Fundt, (1989) cited by Vigoda (2000) defines negative corporate politics as behaviour strategically designed to maximise self interests. Corporate politics can contradict the collective organisational goals or the interests of other people. Medison etal 1980) cited by Vigoda, (2000) observed that when  individuals were asked to describe work place politics they would list self serving and manipulative activities. It can then be understood that negative corporate benefits individuals at the expense of the entire organisation or a work unit. The behaviour is thus associated with manipulation, defamation, subversiveness and illegitimate use of power to attain one’s objectives. Corporate politics can then lead to job anxiety, decrease job satisfaction, and withdrawal from the organisation. Dorory (1993) cited by Vigoda, (2000) found that corporate politics has a potential demaging effect especially on lower status employees. He speculated that employees who lacked a stable power base and effective means of influencing perceived organisational politics as a source of frastiration and react by showing negative attitude towards the organisation. Employees can feel isolated and unhappy if they are not part of a cohesive team or if they are bedevilled by disruptive power politics. In conclusion, one can therefore generalise that positive corporate politics reinforces employee engagement. Employees tend to put more effort either because they expect a reward or have been promised reward for such performance. That is to say employees can be influenced by the reward power. Employees work hard or do not do unwanted behaviours to avoid punishment. in most cases, employees will also give respect to those in authority thus the legitimate power. However, on the other hand, employee will not perform as expected thats negative engagement which can be caused by negative corporate politics. Using case studies, discuss how people within an organisation can use political tactics to survive the corporate political jungle? Individuals within an organisation which can be likened to a political jungle act out roles in efforts to establish identities they wish to convey, and which can result in personal gain. It should also be noted that people alter the image they choose to present, and the strategy used to present this image, based on the situation they are in and the outcomes they hope to achieve that is how they intend to survive (Chad etal 2003). To this effect, it is important to note that individuals do not necessarily use the same tactic in every situation. Likewise, different individuals may choose different tactics when faced with similar situations. For example, whereas one individual may use self-promotion to obtain a job offer, that same individual may use  ingratiation or rationality in an attempt to obtain a promotion or pay raise. On the other hand, another individual, when faced with the same situation, may use ingratiation to obtain a job offer and assertiveness or self-promotion to win a pay raise. Different individuals may use a number of contextual factors which influence tactics an individual chooses to use, under what circumstances he or she chooses to use them, and how effective the tactic of choice will be. Such factors include the relative power of the parties, the direction of the influence attempt, the objective of the influence attempt, and the political skill of the influencer (Falbe Yukl, 1992; Ferris, Perrewe, Anthony, Gilmore, 2000) cited by Chad etal (2003). Buelens etal (2011) also subscribe to the same tactics as identified by Appelbaum and Brent (1998). He pointed out that individuals would use different tactics to get influence within an organisation or rather to get favours and promotions from their bosses. It is however believed that political behaviour is far less common and less intense among employees in lower-level positions than among employees in higher-level positions. There are a variety of political tactics used by employees at almost every organizational level that include forming coalitions and networks, impression management, information management, pursue line responsibility , ingratiation , rational persuasion, consultation and exchange Appelbaum and Brent (1998) . Forming coalitions and networks best known as networking, is a political tactic which consists of befriending important people. These people may not be in positions of any obvious political value but their jobs may provide them with information that could be useful to have. Some people ï ¬ nd that forming friendships with people in upper-level management can help them gain access to important information (Appelbaum and Brent (1998). The above can be illustrated in the following case: Zikanda was a messenger a t RIT Energy. Despite the fact that Zikanda was just a messenger, other senior employees would always give him respect and at most times conform to his needs and favours. For many years in the same organisation, I never realised why even middle level managers would actually conform to unreasonable demands of a mere messenger. Zikanda would take the pool car home as and when he feel like and no one would question that and worse of other senior employee would commute or even ask for transport from him. I later realised that his power or influence was because of his relationship with the General  Manager. Zikanda was no relative with the boss but has managed to form a network with the General Manager they were friends. Zikanda every lunch time would go to the General Manager’s office ask him what he want for lunch. It was Zikanda’s job to be sent to buy him lunch however it was the way the whole thing was done, he would at times buy him lunch with his own monies. The General Manager and Zikanda were just friends they were just too close. Other employees were not comfortable with this relation there were not sure what information the two buddies share. Zikanda has managed to make a network with the General Manager. Impression management is a simple tactic that most people uses from time to time is the management of their outward appearance and style in the quest of trying to impress those in authority. Generally, most organizations prefer a particular image that consists of being loyal, attentive, honest, neatly groomed and sociable. By deliberately trying to exhibit this preferred image, an individual can make a positive impression on inï ¬â€šuential members of the organization. As illustrated in the case of Transport officer who has turned himself to driver. Nhetuka is a transport officer at ZBM Company. Mr Nhetuka has turned himself into a driver in trying to impress management. Nhetuka is always driving managers when he is supposed to delegate drivers to drive managers around. Not only that he takes the Area Manager’s son to and from school a job which is supposed to be done by company driver. Information management is a tactic consisting of managing the information that is shared with others. The nature, as well as the timing, of information given out can have strong effects on others’ conduct (Appelbaum and Brent (1998). People who play the information management game are not likely to lie or spread misinformation, but they rely on the carefully planned release of valid information to obtain their ends (Vecchio and Appelbaum, 1995, p. 323) cited by Appelbaum and Brent (1998). An example can be given of a personnel Clerk who by virtue of his job has access to very important information to include how people can get access to loans among others. The person having such a position can sort respect and influence to the extent that he is able to make people lower themselves to get that information. In a political jungle despite the fact that this information should be given to all employees, one can choose to with hold the information for his own benefit. Pursuing core business within an organization, some positions are more closely tied to the primary  mission of the organization thus the line positions. They are at the very heart of the organization. While staff people may come to wield great power within their own territories, it is the people who do core business who usually â€Å"call the shots† on major issues. Core staff not only makes the more important decisions within the organization, they are also more likely to be promoted to top-level exe cutive positions. In many organizations, there is a preferred department of origin and career path for top- level managers. Therefore, one way to gain inï ¬â€šuence within an organization is to be assigned to a core position. It will often provide more visibility, inï ¬â€šuence, and upward mobility. A case to support the effect of core position for influence in the in an organisation; Takunda was an administration clerk ZETDC an organisation whose core business is to transmit and distribute electricity. He worked very hard for ten years furthering his qualification hoping that one day he will be promoted and be given a higher grade but nothing cane his way. ZETDC would on get people with 5 ‘O’ Level train them as electricians and give them good grades despite that they only posses a Certificate in Electrical power engineering. Takunda then decided to change the career and started a programme at the Polytechnic were he attained a Certificate in Electrical Power Engineering. And it was only then Takunda was recognised and promoted. ‘Ingratiation tactic involves giving compliments or doing favours for superiors or co-workers. Most people have a difficult time rejecting the positive advances of others. Ingratiation usually works as a tactic insofar as the target often feels positive toward the source even if the ingratiation attempt is fairly blatant and transparent. In the behavioural sciences, the notion of â€Å"social reciprocity† has been offered to help explain the process of ingratiation. In social reciprocity, there is a feeling of a social obligation to repay the positive actions of others with similar actions’ Appelbaum and Brent (1998). Appelbaum and Brent, (1998) defines ingratiation as an attempt by individuals to increase their attractiveness in the eyes of others. Ingratiation tends to be used more as an upward inï ¬â€šuence process than as a downward inï ¬â€šuence process. This tactic can best be observed when especial when one has a female boss how often do we pass complements to our female bosses, â€Å"nice hair style†, â€Å"nice dress† even if we don’t mean it. It is a political game most of us play to survive hash judgement from our bosses. In case of a Human resources clerk who  was left acting as Human Resources Officer. During the absence of his boss, Sipiwe was supposed to employ a Customer Care Clerk on a contract basis. Sipiwe knew that his boss’s daughter was unemployed and Sipiwe took this opportunity to employee the boss’s daughter without even consulting the boss. It was later discovered that Sipiwe did this because she had a boyfriend who was out of employment. Sipiwe calculated and realised that it would be easy for her to convince the boss to employ her boyfriend since she has employed the boss’s daughter. In a game of politics one has to be clever and calculative and be able to use politic al tactics to your best advantage. The case above illustrates a tactic called exchange. REFERENCE LIST Appelbaum, S..H. and Hughes, B. (1998) Ingratiation as a political tactic: Effects within the organisation; Journal of Management Decision Vol 36/2 Armstrong, M. (2009) Armstrong’s handbook of human resources management Practice; London, Kogan Pages. Buelens, M. etal (2011) Organisational Behaviour; Berkshire,McGrall- Hill Chad, A. etal (2003) Influence tactics and work outcomes; Journal of Organisational Behaviour Vol 24 No 1. Hellriegal, D. , Slocum, W. J. Jr. and Woodman, R. W. (1995), Organisational Behaviour;New York, West Publishing Company. Vigoda, E. (2000), Organisational Politics, Job attitudes and work outcomes: Exploration and implications for the Public Sector, Journal of Vocational Behaviour Vol 57. MIDLANDS STATE UNIVERSITY FACULT OF SOCIAL SCIENCES BSC HUMAN RESOURCE MANAGEMENT HONOURS DEGRE ORGANISATIONAL BEHAVIOUR [HRM 202] Assignment Cover Page Surname : NcubeName: Innocent Taurai Reg. Number: R135973GMode of Entry: VISITING Level 2.1 Lecturer: Mrs. Masitara Topic/Question: Distinguish between positive and negative corporate politics and explain how these can influence employment engagement. Using case studies, discuss how people within an organisation can use political tactics to survive the corporate political jungle?

An Introduction To Logic Gates Essay

An Introduction To Logic Gates Essay Logic circuit is one that behaves like a switch, i.e. a two-positive devise with ON or OFF states. This is termed as binary device, in which the ON state is represented by 1 and the OFF state by 0. We require devising a logic statement which can be expressed in only one of two forms. For instance As you may know, computers store information in gigabytes, megabytes, and so on. The fundamental unit of storage is the bit or binary digit, which is similar to a switch. Like a switch, which has two states on or off, the bit has two states 1 and 0 (sometimes represented as true and false. We use this abstraction to represent numbers with the binary number system. In order to perform calculations, the computer manipulates bits by means of logical operations, which use inputs to yield a particular output based on the input bits states. To explicitly define the logic, we use truth tables which express the outputs in terms of all combinations of inputs. Examples of truth tables for logical operations are given below: Logical AND (i.e. A.B=C) Logical OR (i.e. A+B=C) Logical NOT (i.e. A) A useful way of representing these logical operations is by means of logic gates, which are pictorial representations of the logic. The most basic logic gates, which illustrate the Boolean logic of the above truth tables, are AND logic gate C=A.B OR logic gate C=A+B NOT logic gate B=A Using the logic gates above, we can create schematics of more complicated circuits. These combinational logic circuits involve feeding the output of one gate to the input of another gate. This allows us to create useful circuits that function according to our needs. Examples are provided below: F=X.Y.Z F=X+Y+Z F=X+Y.Z We probably know that calculators and computers store decimal (0-9) numbers as long strings of zeros and ones in a form called binary code. Each number is stored using microscopic electronic switches called transistors. Its easy to store binary numbers simply by switching transistors on and off. Switching on a transistor stores a number one; switching it off stores a zero. So storing numbers is easy. But how can you add, subtract, multiply, and divide using nothing but electric currents? Calculators and computers do these using clever electronic circuits called logic gates. Fig:1.1 Photo: A gate can keep we out or let we into a field. In the same way, a microscopic logic gate is a barrier in an electronic circuit that can let electricity through or stop it flowing altogether. Put lots of logic gates together and you make a machine thats capable of basic mathematical reasoning. TYPES OF LOGIC GATES: Logic gates: circuits that compare A logic gate might sound horribly complex, but its simply an electric circuit with two inputs and an output. It receives two incoming electric currents, compares them, and sends on a new, outgoing electric current depending on what it finds. A logic gate is a bit like a doorman or bouncer who is allowed to let people into a nightclub only if they pass certain tests. There are quite a few different types of logic gate, the most common of which are called AND, OR, NOT, XOR (Exclusive Or), NAND (NOT AND), and NOR (NOT OR). Lets look at the three simpler ones, AND, OR, and NOT: AND Suppose we went to a nightclub where the doormans job is to enforce a simple rule: Everyone in our group must wear a tie to come in. We went along with a friend one night. If were both wearing ties, youll get in. If only one of we is wearing a tie, or if neither of us is, neither of you will get in. An AND logic gate works the same way with two electrical inputs. If both inputs are switched on (that is, carry a number 1), the output will be 1 as well. Otherwise the output will be 0. In electronics, we can represent an AND gate with this little symbol. Three ways in which the gate can work are shown below. OR Were not wearing a tie, so you go to another club further down the street. Here, the person on the door is enforcing a different rule: A group of people can come in if any one of them is a member. If either we or our friend is a member, or if you both are members, we can both come in. If neither of we is a member, youre both left out in the cold. An OR logic gate works this way with two electrical inputs. If either input is switched on (that is, carries a number 1), the output will be 1 as well. Otherwise the output will be 0. In electronics, we represent an OR gate with a different symbol. Three ways in which it can work are shown beneath: NOT So far, weve failed to get into either of the clubs. But theres one last hope: you know a friend is having a party a few streets away. The only trouble is, theres a really argumentative and contrary person on the door. He talks to each person in turn as they approach him. If youre nice and polite, he shouts abuse at you and turns you away. But if youre rude to him, he likes that for some reason and lets you in. In other words, he does exactly the opposite of what youd expect! In electronics, theres a logic gate that works in the same, contrary way and its called a NOT gate or invertor. Unlike AND and OR gates, it has only one input and one output. The output is exactly the opposite of the input, so if the input is a 0, the output is a 1 and vice versa. Heres how we represent a NOT in electronics. Two ways it can work are shown beneath. The other three common logic gates are variations on these three. XOR (Exclusive OR) is like an OR, but it switches off if both the inputs are switched on. NAND is just like AND, only the end result is swapped over (so where AND produces an output of 1, NAND produces an output of 0). NOR is like OR with the end result swapped over in the same way. Calculators can do all the things they need to do using different combinations of logic gates. Its logic gates that control how the display works in a calculator and more logic gates that figure out the results of calculations. Lets take a closer look NAND gate This is a NOT-AND gate which is equal to an AND gate followed by a NOT gate. The outputs of all NAND gates are high i any of the inputs are low. The symbol is an AND gate with a small circle on the output. The small circle represents inversion.   NOR gate This is a NOT-OR gate which is equal to an OR gate followed by a NOT gate. The outputs of all NOR gates are low if any of the inputs are high. The symbol is an OR gate with a small circle on the output. The small circle represents inversion.   EXOR gate The Exclusive-OR gate is a circuit which will give a high output if either, but not both, of its two inputs are high. An encircled plus sign () is used to show the EOR operation. EXNOR gate The Exclusive-NOR gate circuit does the opposite to the EOR gate. It will give a low output if either, but not both, of its two inputs are high. The symbol is an EXOR gate with a small circle on the output. The small circle represents inversion. The NAND and NOR gates are called universal functions since with either one the AND and OR functions and NOT can be generated. Note: A function in sum of products form can be implemented using NAND gates by replacing all AND and OR gates by NAND gates. A function in product of sums form can be implemented using NOR gates by replacing all AND and OR gates by NOR gates. IMPLEMENTATION OF LOGIC GATES FIG: 1.2 130 ELECTRONIC CALCULATOR   The Friden 130 uses diode-resistor OR and AND logic gates, with transistor-based inverter, buffer, and flip-flop devices. It performs math operations in bit-serial form, using the magnetostrictive delay line as the medium for storing its working registers. Logic levels are 0 Volts representing logic 1, and -12 Volts (nominally) representing logic 0. The delay line input transducer is driven with a pulse of approximately 20V, and by the time the signal makes it to the other end of the delay line, the voltage induced in the transducer is approximately 35mV, or 35/1000ths of a volt. Digits are stored within the delay line as a series of pulses arranged in groups for each digit. Zero pulses represent a zero, and nine pulses represent a nine, with the numbers in-between represented by a number of pulses matching the number. As the pulses exit the delay line, they are amplified and fed into the counters (the A and/or D counters), which count the number of pulses in the digit to form a uniq ue five-bit identifier that represents the number. The counter registers are not configured as counters in the usual binary sense. They are instead configured as five stage switch-tail shift registers, such that they count in a sequence of shifting 1s. For example; 0 is represented as 00000; 1 as 10000; 2 as 11000; 3 as 11100; 4 as 11110; 5 as 11111; with 6 as 01111, and ending with 9 as 00001. With five flip flops, each counter can represent the numbers zero through nine as unique combinations of bit patterns. In terms of applying logic gates to real world applications, many gates can be used in Figure1`.3CEP-1114 Piezo Buzzer Frequency processing. For example, when dealing with piezo audio transducers such as the CEP-1114, an oscillating frequency signal is require to produce a sound pattern from the buzzer.   Figure 3: AND gate signal output wave generator such as an oscilloscope or a programmed PIC must be logically processed with a second frequency signal to create a combination of high/low outputs which will turn the Buzzer on and off creating a sound pattern. So if you used a Square-wave signal from a PIC as one input into an AND gate and a second varying frequency as the other input, it is proven due to AND gate logic that when both signals are high the buzzer will produce a sound, and any other combination will turn the buzzer off. Furthermore, as you can see from Figure 3 on the left, the output is only high when both Input A and Input B are high. If Input B was changed or altered, this would alter the output signal sent to the buzzer. Imagine that Input B was stretched so that only one period was observed in the time give rather than two periods. This would extent the time that Input B is high and would increase the time that the output is high. Additionally, if variation of the waveform inputs is difficult or impossible, variation of the output can still be accomplished by simply changing the logic gate implemented. If the AND gate currently being used was replaced with a NAND gate, the output would be completely reversed. Every time the output was high using the AND gate will now be low, and every time the output was low will now be high. Conclusion Logic gates come in all shapes and sizes, and whether they are used in combinations or individually, they provide the user with many options and solutions to problems which may appear difficult at first. Furthermore, these seven basic logic gates ease the complexity of Boolean algebra and allow for simple application in electronics and circuit analysis. These gates can be used in almost any situation such as comparison of frequencies when developing filters in communication or in more mechanical settings when using choppers and inverters which compare input and output currents to determine modulating indexes. Figure 2: CEP-1114 Piezo Buzzer FLIP FLOPS Flip flops are actually an application of logic gates. With the help of Boolean logic you can create memory with them. This is the most basic idea of a Random Access Memory [RAM]. If the logic gates are designed correctly, they will be helpful in remembering the input value given to them. A higher application of flip flops is helpful in designing better electronic circuits. The main use of flip flops is the implementation of a feedback circuit. As a memory relies on the feedback concept, flip flops can be used to design it. Given below is a simple feedback circuit using two inverter logic gates. Take a look. Though this circuit is not good for practical electronic circuits, it will help you to get a clear idea on what a feedback circuit is. When the value of the output Q happens to be 0, it always remains 0. If the output happens to be 1, it always remains 1 There are mainly four types of flip flops that are used in electronic circuits. They are The basic flip flop or S-R Flip Flop Delay Flip Flop [D Flip Flop] J-K flip flop T flip flop 1. S-R Flip Flop The SET-RESET flip flop can be designed with the help of two NOR gates and also two NAND gates. These flip flops are also referred to as S-R Latch. S-R Flip Flop using NOR Gate The flip flop has mainly two inputs, called the SET [S] and RESET [R]. There are also two outputs, Q and Q. The diagram and truth table is shown below. S-R Flip Flop using NOR Gate From the diagram it is evident that the flip flop has mainly four states. They are S=1, R=0-Q=1, Q=0 This state is also called the SET state. S=0, R=1-Q=0, Q=1 This state is known as the RESET state. In both the states you can see that the outputs are just compliments of each other and that the value of Q follows the value of S. S=0, R=0-Q Q = Remember If both the values of S and R are switched to 0, then the circuit remembers the value of S and R in their previous state. S=1, R=1-Q=0, Q=0 [Invalid] This is an invalid state because the values of both Q and Q are 0. They are supposed to be compliments of each other. Normally, this state must be avoided. S-R Flip Flop using NAND Gate The circuit of the S-R flip flop using NAND Gate and its truth table is shown below. S-R Flip Flop using NAND Gate Like the NOR Gate S-R flip flop, this one also has four states. They are S=1, R=0-Q=0, Q=1 This state is also called the SET state. S=0, R=1-Q=1, Q=0 This state is known as the RESET state. In both the states you can see that the outputs are just compliments of each other and that the value of Q follows the compliment value of S. S=0, R=0-Q=1, Q =1 [Invalid] If both the values of S and R are switched to 0 it is an invalid state because the values of both Q and Q are 1. They are supposed to be compliments of each other. Normally, this state must be avoided. S=1, R=1-Q Q= Remember If both the values of S and R are switched to 1, then the circuit remembers the value of S and R in their previous state. Clocked S-R Flip Flop It is also called a Gated S-R flip flop. The invalid state can only be removed by using a bistable SR flip-flop that can change outputs when certain invalid states are met regardless of the condition of either the Set or the Reset inputs. For this, a clocked S-R flip flop is designed by adding two AND gates to a basic NOR Gate flip flop. The circuit diagram and truth table is shown below. Clocked S-R Flip Flop A clock pulse [CP] is given to the inputs of the AND Gate. In the beginning the outputs of both the AND Gates remain 0 until the value of CP is 0. When a pulse is given the value of CP turns 1. This makes the values at S and R to pass through the NOR Gate flip flop. But when both the S and R values turn 1, the HIGH value of CP causes both of them to turn to 0 for a short moment. As soon as the pulse is removed, the flip flop state becomes intermediate. Thus either of the two states may be caused, and it depends on whether the set or reset input of the flip-flop remains a 1 longer than the transition to 0 at the end of the pulse. Thus the invalid states can be eliminated. 2. D Flip Flop The circuit diagram and truth table is given below. D Flip Flop D flip flop is actually a slight modification of the above explained clocked SR flip-flop. From the figure you can see that the D input is connected to the S input and the complement of the D input is connected to the R input. The D input is passed on to the flip flop when the value of CP is 1. When CP is HIGH, the flip flop moves to the SET state. If it is 0, the flip flop switches to the CLEAR state. To know more about the triggering of flip flop click on the link below. TAKE A LOOK :  TRIGGERING OF FLIP FLOPS TAKE A LOOK :  MASTER-SLAVE FLIP FLOP CIRCUIT 3. J-K Flip Flop The circuit diagram and truth-table of a J-K flip flop is shown below. J-K Flip Flop A J-K flip flop can also be defined as a modification of the S-R flip flop such that it is a refinement at the indeterminate state of the SR flip flop. The inputs J and K behave just like the S and R inputs of the S-R flip flop. The letter J stands for SET and the letter K stands for CLEAR. When both the inputs J and K have a HIGH state, the flip-flop is designed to switch to its complement state. So if the value of Q was 1, it switches to Q=0 and if the value of Q was 0 it switches to Q=1. Two 3-input AND Gates are used in the circuit. The output Q of the flip flop is given as a feedback to the input of the AND along with other inputs like K and clock pulse [CP]. So, the flip flop gets a CLEAR signal when the value of CP is 1 only if the value of Q was earlier 1. Similarly output Q of the flip flop is given as a feedback to the input of the AND along with other inputs like J and clock pulse [CP]. So the output becomes SET when the value of CP is 1 only if the value of Q was earlier 1. The output may be repeated in transitions once they have been complimented for J=K=1 because of the feedback connection in the JK flip-flop. This can be avoided by setting a time duration lesser than the propagation delay through the flip-flop. The restriction on the pulse width can be eliminated with a master-slave or edge-triggered construction. 4. T Flip Flop This is a much simpler version of the J-K flip flop. Both the J and K inputs are connected together and thus are also called a single input J-K flip flop. When clock pulse is given to the flip flop, the output begins to toggle. Here also the restriction on the pulse width can be eliminated with a master-slave or edge-triggered construction. Take a look at the circuit and truth table below. T Flip Flop Conclusion Logic gates come in all shapes and sizes, and whether they are used in combinations or individually, they provide the user with many options and solutions to problems which may appear difficult at first. Furthermore, these seven basic logic gates ease the complexity of Boolean algebra and allow for simple application in electronics and circuit analysis. These gates can be used in almost any situation such as comparison of frequencies when developing filters in communication or in more mechanical settings when using choppers and inverters which compare input and output currents to determine modulating indexes