A CMOS Channel-Select Filter for a Direct-Conversion WirelesThis paper was presented at the Symposium on VLSI Circuits, Honolulu, June 13-15, 1996. It appears on pages 62-63 of the conference proceedings. A CMOS Channel-Select Filter for a Direct-Conversion Wireless Receiver P. J. Chang, A. Rofougaran, and A. A. Abidi Electrical Engineering Department University of California Los Angeles, CA 90095-1594 Introduction & Specifications Whereas noise and nonlinearity in the RF front-end determine the sensitivity of a wireless receiver, the filters wholly govern its selectivity―that is, its ability to pick out a signal of interest in a frequency band, while rejecting all the other nearby signals populating that band. Filtering, like amplification, builds progressively in the receiver. The RF preselect filter attenuates the image to the desired channel, ……