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
fDate :
4/15/1999 12:00:00 AM
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;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19990441
