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

被引：32
|
作者：
Chang, PJ
Rofougaran, A
Abidi, AA
机构：
[1] Intgd. Circt. and Systems Laboratory, Electrical Engineering Department, University of California, Los Angeles
[2] Carnegie Mellon University, Pittsburgh, PA
[3] University of California, Los Angeles, CA
[4] Gigabit Logic, Inc., Newbury Park, CA
来源：
IEEE JOURNAL OF SOLID-STATE CIRCUITS | 1997年 / 32卷 / 05期
关键词：
biquadratic filters; CMOS analog integrated circuits; elliptic filters; frequency shift keying; low-pass filters; surface acoustic wave filters; switched capacitor circuits; switched capacitor filters; UHF radio communication; UHF receiver;
D O I：
10.1109/4.568841
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A highly selective and linear switched-capacitor channel-select Alter is fabricated in 1-mu m CMOS for a direct-conversion wireless receiver operating in the 902-928 Mhz ISM band. The Alter 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/root Hz, and the circuit takes 1.6 mA from a 3.3 V supply. Direct subsampling of the 915 MHz RF input signal by the Alter front-end is also demonstrated with only a small degradation ire linearity, The input noise voltage is halved in a redesign while keeping the current drain unchanged.
引用
收藏
页码：722 / 729
页数：8
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