CMOS Front-End Circuits of Dual-Band GPS Receiver

Abstract

A RF front-end chip for a dual-band Global Positioning System (GPS) receiver for L1 and L2 bands is designed using 0.25 µm CMOS technology.All function blocks of the GPS front-end are integrated onto one chip.The low noise amplifier has input matching over a wide frequency range to handle the L1 and L2 bands.This receiver uses a dualband image-reject mixer with the quadrature mixer sharing a transconductor stage.This configuration enables the RF blocks to be shared with the L1 and L2 bands.The receiver has a chip area of 3.16 mm × 3.16 mm, and consumes 35 mA at 2.5 V.