Title :
Switched-capacitor bandpass filter with quasi-continuous digital Q-factor tunability
Author :
Ausín, J.L. ; Duque-Carrillo, J.F. ; Torelli, G. ; Maloberti, E.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. de Extremadura, Badajoz, Spain
fDate :
1/3/2002 12:00:00 AM
Abstract :
A second-order switched-capacitor (SC) bandpass filter with very wide Q-factor programmability range, is presented. Although the Q-factor is controlled by digitally varying the effective sampling frequency of an SC branch, quasi-continuous programmability is provided. Experimental results from a 0.8 μm CMOS integrated prototype demonstrate the versatility of the proposed technique
Keywords :
CMOS analogue integrated circuits; Q-factor; band-pass filters; circuit tuning; programmable filters; switched capacitor filters; CMOS integrated prototype; digital control; effective sampling frequency; equivalent resistance; positive feedback; quasi-continuous digital Q-factor tunability; second-order filter; single-stage cascode mirrored topology; switched-capacitor bandpass filter; very wide Q-factor programmability;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20020014
