Integrated selectivity for narrow-band FM IF systems

Author

Krummenacher, F. ; Van Ruymbeke, G.

Author_Institution

Electron. Lab., Swiss Federal Inst. of Technol., Lausanne, Switzerland

Volume

25

Issue

3

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

757

Lastpage

760

Abstract

An 18th-order all-pole continuous-time bandpass filter for IF (intermediate frequency) filtering purposes has been designed and integrated in a 3-μm CMOS process. Implemented using nine fully balanced, transconductor-capacitor coupled resonators, the filter features a 20-kHz bandwidth at 200-kHz center frequency and 54-dB dynamic range (IM3<-40 dB) and consumes 300 μA from a single 4-V supply. With the use of conventional phase-locked loop techniques for automatic tuning, the accuracy of the filter response is comparable to that of ceramic filters. As expected, the fundamental limitations of such an active implementation compared to a passive realization are noise and distortion

Keywords

CMOS integrated circuits; active filters; band-pass filters; phase-locked loops; radiofrequency filters; tuning; 20 kHz; 200 kHz; 3 micron; CMOS process; active implementation; all-pole continuous-time bandpass filter; automatic tuning; center frequency; distortion; dynamic range; filter response; narrow-band FM IF systems; noise; phase-locked loop techniques; transconductor-capacitor coupled resonators; Band pass filters; Bandwidth; CMOS process; Dynamic range; Filtering; Frequency; Narrowband; Phase locked loops; Resonator filters; Tuning;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.102671

Filename

102671