The Half Adder vs. The Full Adder: How Computers Do Math
TL;DR: A half adder sums two single bits to produce Sum (XOR) and Carry (AND). A full adder sums three bits — A, B, and a carry-in — and is...
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Binary addition
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The Half Adder: Your First Step into Digital Logic Design
TL;DR: A half adder is the simplest binary-addition circuit. Two inputs (A, B) produce two outputs: Sum = (XOR) and Carry = (AND). It's only "half" an adder because it...
Mastering Binary Addition: Building a 4-Bit Ripple Carry Adder
TL;DR: A 4-bit ripple carry adder chains four full adders so each stage's carry-out feeds the next stage's carry-in. The architecture is simple but slow: total...