A CMOS 435-mW 22-dBm IIP3 Continuously Tunable Channel Select Filter for WLANWiM

Abstract

A low-power high linearity CMOS G -C channel select filter for WLAN/WiMAX receivers in 90-nm CMOS tech- nology is presented. To reduce power consumption a biquad cell with simple architecture is used. A simple but ef ficient technique is also proposed to improve the linearity of the filter without increasing its power consumption. Coarse and fine tuning tech- niques are used to tune the cutoff frequency of the sixth-order Butterworth low-pass filter from 8.1 MHz to 13.5 MHz suitable f o rW L A Na n d