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Page 1 Basic Logic Gates Page 2 Basic Logic Gates Logic Gates Goal: n To understand how digital a computer can work, at the lowest level. n To understand what is possible and the limitations of what is possible for a digital computer. Page 3 Basic Logic Gates Logic Gates Goal: n To understand how digital a computer can work, at the lowest level. n To understand what is possible and the limitations of what is possible for a digital computer. Logic Gates All digital computers for the past 50 years have been constructed using the same type of components. These components are called logic gates. Logic gates have been implemented in many different ways. Currently, logic gates are most commonly implemented using electronic VLSI transistor logic. Page 4 Basic Logic Gates Logic Gates Goal: n To understand how digital a computer can work, at the lowest level. n To understand what is possible and the limitations of what is possible for a digital computer. Logic Gates All digital computers for the past 50 years have been constructed using the same type of components. These components are called logic gates. Logic gates have been implemented in many different ways. Currently, logic gates are most commonly implemented using electronic VLSI transistor logic. Logic Gates All basic logic gates have the ability to accept either one or two input signals (depending upon the type of gate) and generate one output signal. Page 5 Basic Logic Gates Logic Gates Goal: n To understand how digital a computer can work, at the lowest level. n To understand what is possible and the limitations of what is possible for a digital computer. Logic Gates All digital computers for the past 50 years have been constructed using the same type of components. These components are called logic gates. Logic gates have been implemented in many different ways. Currently, logic gates are most commonly implemented using electronic VLSI transistor logic. Logic Gates All basic logic gates have the ability to accept either one or two input signals (depending upon the type of gate) and generate one output signal. Logic Gates Input and Output signals are binary. n binary: n always in one of two possible states; n typically treated as: On / Off (electrically) 1 / 0 True / False There is a delay between when a change happens at a logic gates inputs and when the output changes, called gate switching time. The True or False view is most useful for thinking about the meaning of the basic logic gates.Read More
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