CMOS digitally programmable filter for multi-standard wireless receivers

Author

Alzaher, Hussain A. ; Elwan, H.O. ; Ismail, Mahamod

Author_Institution

Dept. of Electr. Eng., Ohio State Univ., Columbus, OH

Volume

36

Issue

2

fYear

2000

fDate

1/20/2000 12:00:00 AM

Firstpage

133

Lastpage

135

Abstract

The technique exhibits the wide frequency range of the transconductance amplifier filters while offering improved linearity. It utilises digitally controlled current followers to provide precise frequency characteristics that can be tuned over a wide range. A digitally tuned lowpass filter is designed for implementing the channel-select filter in the baseband chain of a multi-standard CMOS wireless receiver. Simulation and experimental results obtained from a 1.2 μm chip show a programmable frequency response covering the IS-54, GSM, IS-95 and WCDMA wireless standards

Keywords

CMOS digital integrated circuits; channel bank filters; code division multiple access; digital filters; frequency response; low-pass filters; mobile radio; programmable filters; radio receivers; telecommunication standards; 1.2 micron; CMOS digitally programmable filter; GSM; IS-54; IS-95; WCDMA wireless standards; baseband chain; channel-select filter; digitally controlled current followers; linearity; lowpass filter; multi-standard wireless receivers; precise frequency characteristics; programmable frequency response;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:20000197

Filename

833141