Session 18-4

A 381 fs/bit, 51.7 nW/bit Nearest Hamming-Distance Search Circuit
in 65 nm CMOS

 

Abstract

The developed fully-parallel associative memory in 65nm CMOS for nearest Hamming-distance search is based on distance-frequency mapping with ring oscillators. The largest reference-data capacity of 128 pattern with 512 bit each, the shortest minimum search time of 3.81•10-13 s/bit and the lowest power dissipation of 5.17•10-8 W/bit in comparison to previous designs are reported. In particular, the power-delay product of 1.97•10-20 J/bit is improved by a factor 140.