DocumentCode :
1271074
Title :
New folded cascode transconductor for bandpass ladder filters
Author :
Greer, N.P.J. ; Denyer, P.B.
Author_Institution :
Wolfson Microelectron. Ltd., Edinburgh, UK
Volume :
138
Issue :
5
fYear :
1991
fDate :
10/1/1991 12:00:00 AM
Firstpage :
551
Lastpage :
556
Abstract :
The problems of designing CMOS transconductors for high frequency bandpass ladder filters are discussed, and an original circuit for overcoming these problems is presented. This circuit features a new grounded-quad input stage, a very high output impedance and the facility of low impedance inputs to avoid the requirement for transconductance ratios in scaled filters. The application of the new transconductor is illustrated by the design of a high frequency sixth-order Chebyshev bandpass filter. The performance of the transconductor and the filter are demonstrated by analysis and simulation results
Keywords :
CMOS integrated circuits; active filters; amplifiers; band-pass filters; ladder networks; CMOS transconductors; HF filters; analysis; bandpass ladder filters; features; folded cascode transconductor; grounded-quad input stage; high output impedance; low impedance inputs; scaled filters; simulation results; sixth-order Chebyshev bandpass filter;
fLanguage :
English
Journal_Title :
Circuits, Devices and Systems, IEE Proceedings G
Publisher :
iet
ISSN :
0956-3768
Type :
jour
Filename :
99500
Link To Document :
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