A 2.6mW 370MHz-to-2.5GHz open-loop quadrature clock generator

Abstract

An open-loop multi-octave quadrature clock generator that consists of cascaded quadrature correction stages is reported. It uses CMOS inverters. Fabricated in a 65nm CMOS process, the chip achieves frequency ranges of 1.2 octaves and 2.7 octaves for phase accuracies of ±2° and ±5°, respectively, and consumes 2.6mW from a 1V supply at 2.5GHz. ©2008 IEEE.