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Pulse and Digital Circuits by Manmadha Rao G., Rama Sudha K., Venkata Rao K.

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10.2 LOGIC GATES

A logic gate is a circuit that gives either ‘0’ (LOW) level or ‘1’ (HIGH) level at the output, depending on the input conditions. The basic logic gates can be wired using discrete components such as resistors, diodes, transistors and FETs. The wiring of a complex gate circuit is unthinkable using discrete components. When the complexity of the gate circuit increases, it is preferable to wire the logic gate in an integrated circuit form. In this section, we basically describe the different types of logic gates using discrete components only, in order to understand the principle of operation of logic circuits of different logic families.

10.2.1 Simple Diode Gates

AND and OR are the two basic gates from which NAND and NOR gates ...

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