error-detection
Parity Bit Tutorial: Single-Bit Error Detection
TL;DR: A parity bit is one extra bit appended to a binary word so that the total number of 1s is even (even parity) or odd (odd parity). A chain...
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error-detection
A collection of 4 posts
xnor-gate
The XNOR Gate: Champion of Equality in Digital Logic
TL;DR: The XNOR gate (Exclusive-NOR) outputs 1 only when its inputs are equal — both 0 or both 1. Boolean expression . Multi-input XNOR chains act as even-parity detectors, and...
xor-gate
The XOR Gate: Mastering the Logic of Difference
TL;DR: The XOR (Exclusive OR) gate outputs 1 only when its inputs differ. Boolean expression . XOR is binary addition modulo 2, the sum bit of a half adder, the...
xor-gate
XOR vs. XNOR: The Critical Difference in Error Detection
TL;DR: XOR outputs 1 when inputs differ; XNOR outputs 1 when they match. Multi-input XOR chains detect odd parity; multi-input XNOR chains detect even parity. The choice between them depends...