🗜️ 4:2 Approximate Compressor Playground
A 4:2 compressor reduces 4 partial product rows down to 2. Click the 4 input bits below to compare exact vs. inexact truth-table logic and transistor reduction!
Exact 4:2 Compressor (26 Transistors)
Sum=0, Carry=1, Cout=0
Total Value = 2
Approximate 4:2 Compressor (14 Transistors)
Sum=0, Carry=1, Cout=0
Total Value = 2
Logic Match
Exact Match (100%)
Transistor Reduction
46.2% Saved
Truth Table Accuracy
28/32 (87.5%)
Critical Path Delay
1.5× Faster