DocumentCode
1521629
Title
Digital frequency and Q tuning technique for low-voltage active filters
Author
Huang, H. ; Lee, E.K.F.
Author_Institution
Dept. of Electr. Eng. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Volume
35
Issue
8
fYear
1999
fDate
4/15/1999 12:00:00 AM
Firstpage
635
Lastpage
636
Abstract
A digital frequency and Q tuning technique is proposed for low-voltage (1 V) active RC biquad filters that uses programmable capacitor arrays (PCAs). The proposed technique does not require any peak detectors, which are difficult to implement at low voltages. Instead, it uses a small number of analogue comparators, a digital comparator and binary counters to adjust the PCAs
Keywords
Q-factor; RC circuits; biquadratic filters; circuit tuning; low-power electronics; programmable filters; 1 V; Q tuning; analogue comparator; binary counter; digital comparator; digital tuning; frequency tuning; low-voltage active RC biquad filter; programmable capacitor array;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19990441
Filename
771001
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