1.8V CMOS analog compander and 80 dB dynamic range

A novel analog compander for telecommunication application has been developed which has a wide dynamic range at low supply voltage. By adopting a new circuit architecture based on a MOS resistive circuit concept, a fully differential circuit configuration, and a triple threshold voltage process, a wide dynamic range of 80 dB and a low distortion of less than -70 dB have been realized at a 1.8-V supply voltage. The compander has other merits, i.e., a wide supply voltage range from 1.8 V to 5.5 V, a high tone quality due to zero delay time, and a low power consumption of 3.6 mW. This LSI has been fabricated using a 1.0-/spl mu/m CMOS process. The core size of the compander is 1.68 mm/sup 2/.