Title :
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
fDate :
1/20/2000 12:00:00 AM
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;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20000197
