1-V CMOS comparator for programmable analog rank-order extractor

Abstract

A CMOS rail-to-rail comparator operating at low-voltage supply and obtained by using a conventional fabrication process is proposed. Based on the comparator, an analog rank-order extractor with k winner-take-all capability is presented. An experimental chip was fabricated using 0.5 /spl mu/m CMOS technology. Measured results at 1-V supply voltage show a comparator response time of 4 /spl mu/s for 10-mV precision and that, within 4 /spl mu/s, the extractor successfully identifies a 100-mV differential voltage among inputs to find a rank order of the input set.