A 3.3 V 0.8 μm CMOS single chip IF IC for CDMA/FM cellular phone

Abstract

A 3.3 v 150 mW IF IC is implemented using 0.8 /spl mu/m CMOS process. This IC integrates both CDMA and FM IF signal processing units and interfaces between IF signals and baseband modem. Rx mixer down-converts 85.38 MHz IF signals into baseband signal, and Tx mixer based on a replica transconductor up-converts baseband signal into a 130.38 MHz IF signal. The chip size is 5.5/spl times/6.3 mm/sup 2/.