A broad-band tunable CMOS channel-select filter for a low-IF wireless receiver

Author

Behbahani, Farbod ; Tan, Weeguan ; Karimi-Sanjaani, Ali ; Roithmeier, Andreas ; Abidi, Asad A.

Author_Institution

Valence Semicond. Inc., Irvine, CA, USA

Volume

35

Issue

4

fYear

2000

fDate

4/1/2000 12:00:00 AM

Firstpage

476

Lastpage

489

Abstract

This paper presents a broad-band bandpass filter (BPF) designed as a channel-select filter for wireless applications. It is implemented as a low-pass filter (LPF) in series with a high-pass filter (HPF) for lower power consumption compared to true BPF. Semiscaling of the filter nodes is superior in the wireless receiver over traditional full scaling. The HPF is built with low-pass feedback of an amplifier. The bandwidth is selectable from 625 kHz, 2.5 MHz, or 10 MHz. The filter stopband loss is more than 50 dB extending beyond 100 MHz, and passband ripple less than 2.5 dB. Fabricated in a 0.6-/spl mu/m CMOS process, it provides a minimum input noise of 16 nV//spl radic/Hz noise with 22.5-dBm out-of-band IIP3, while draining an average 14 mA from 3.3 V.

Keywords

CMOS analogue integrated circuits; active filters; band-pass filters; channel bank filters; circuit feedback; wireless LAN; 0.6 micron; 14 mA; 3.3 V; 625 kHz to 10 MHz; CMOS channel-select filter; broadband bandpass filter; channel-select filter; filter nodes; filter stopband loss; high-pass filter; low-IF wireless receiver; low-pass feedback; low-pass filter; minimum input noise; out-of-band IIP3; passband ripple; power consumption; wireless applications; Active filters; Band pass filters; Bandwidth; Digital filters; Dynamic range; Energy consumption; Integrated circuit noise; Low pass filters; Passband; Receivers;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.839908

Filename

839908