A CMOS channel-select filter for a direct-conversion wireless receiver

A highly selective and linear switched-capacitor channel-select filter is fabricated in 1-/spl mu/m CMOS for a direct-conversion wireless receiver operating in the 902-928 MHz ISM band. The filter selects a 230-kHz wide channel and attenuates by at least 50 dB from 320 kHz to 57 MHz. The input IP3 i...

Full description

Saved in:
Bibliographic Details
Published in:IEEE journal of solid-state circuits 1997-05, Vol.32 (5), p.722-729
Main Authors: Chang, P.J., Rofougaran, A., Abidi, A.A.
Format: Article
Language:English
Subjects:
Active filters
Band pass filters
Degradation
Frequency shift keying
Low pass filters
Passband
Radio frequency
Receivers
Semiconductor device noise
Surface acoustic waves
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A highly selective and linear switched-capacitor channel-select filter is fabricated in 1-/spl mu/m CMOS for a direct-conversion wireless receiver operating in the 902-928 MHz ISM band. The filter selects a 230-kHz wide channel and attenuates by at least 50 dB from 320 kHz to 57 MHz. The input IP3 is +30 dBm, the input-referred noise in the passband is 70 nV//spl radic/Hz, and the circuit takes 4.6 mA from a 3.3 V supply. Direct subsampling of the 915 MHz RF input signal by the filter front-end is also demonstrated with only a small degradation in linearity. The input noise voltage is halved in a redesign while keeping the current drain unchanged.
ISSN:0018-9200
1558-173X
DOI:10.1109/4.568841