Logic Gates:
Logic gates are the electronic circuits that perform logical operations on one or more inputs to produce one output.Logical Operation:
Operation performed using the rules of logic, such as the boolean algebra.
• NOT (INVERTER) GATE:
This inverts the input.
Output is true (1), if input is false (0) and vice-versa.
• OR GATE:
Output is true (1), if any of input(s) are true.
Output is false (0), if and only if all the inputs are false.
• AND GATE:
Output is true (1), if and only if all inputs are true.
Output is false (0), if any of the input(s) are false.
• BUFFER (NOT-NOT) GATE:
A NOT gate connected to a NOT gate.
The second NOT gate inverses the output (inverse of the input) of the first NOT gate.
The purpose of a buffer gate is to amplify a signal if its current is too weak.
• NOR (NOT-OR) GATE:
An OR gate followed by a NOT gate.
This inverts the output of OR gate.
• NAND (NOT-AND) GATE:
An AND gate followed by NOT gate.
This inverts the output of AND gate.
Equivalent gate circuit
• Exclusive-OR (XOR) GATE:
Output is true (1), if inputs are different (1 and 0, 0 and 1).
Output is false (0), if all inputs are same (1 and 1, 0 and 0).
• Exclusive-NOR (XNOR) GATE:
A XOR gate followed by NOT gate.
This inverts the output of XOR gate.
