XNOR gate

An XNOR gate outputs 1 when its inputs have the same value and 0 when they differ. It is the complement of the XOR gate.

XNOR truth table: A table listing an XNOR gate’s output for every possible input combination. It makes the gate’s same-inputs rule explicit for two or more inputs.
Digital comparator: A circuit that compares binary values and indicates whether they are equal or which is larger. XNOR gates compare corresponding bits; combining their outputs detects whole-word equality.
XOR gate: A logic gate that outputs 1 when its inputs differ and 0 when they are the same. XOR reverses every output of XNOR, making it the direct logical complement.
Binary number: A number represented using the two digits 0 and 1. XNOR inputs and outputs are binary values.
Boolean algebra: An algebraic system using binary values and operations such as AND, OR, and NOT. XNOR behavior can be expressed and simplified with Boolean identities.
Parity bit: An extra binary digit used to make the number of 1s in a data unit even or odd. XNOR operations can compute or check parity across a group of bits.
AND gate: A logic gate that outputs 1 only when all its inputs are 1. AND tests for all-high inputs, while XNOR tests whether inputs match.
Logic gate: An electronic or abstract device that performs a Boolean operation on binary inputs. XNOR is one specific kind of logic gate.
Transistor–transistor logic: A digital logic family that uses bipolar junction transistors for switching and amplification. TTL integrated circuits implement XNOR behavior using transistor networks.
Error detection and correction: Methods for detecting or correcting changes to data during storage or transmission. XNOR-based parity checks reveal certain bit errors in transmitted data.

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