Alternative Logic Gates - SS2 ICT Lesson Note

While the basic logic gates (AND, OR, NOT) are the foundation, there are alternative logic gates that offer different functionality and are used in specific situations. 

Each of these gates serves specific purposes and allows engineers to design complex digital systems tailored to their requirements. Some of these alternative gates include:

NAND Gate: This gate acts as an AND gate followed by a NOT gate. It is considered universal because any other gate can be constructed using only NAND gates.

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NOR Gate: This gate acts as an OR gate followed by a NOT gate. Like the NAND gate, it is also universal and can be used to create any other gate.

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XOR Gate: The Exclusive OR gate produces an output of 1 if the number of input 1s is odd. It is used in binary addition and error detection.

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XNOR Gate: The Exclusive NOR gate produces an output of 1 if the number of input 1s is even. It is used in parity check and binary subtraction.

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Buffer/Gate: The buffer simply passes its input to the output. It can be useful for signal conditioning and impedance matching.

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Schmitt Trigger/Gate: This gate has hysteresis and is used for signal conditioning and noise filtering.

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Mux (Multiplexer) and Demux (Demultiplexer): These are not basic gates, but they are widely used to select and route signals in digital systems.

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