Title :
Digital tuning of high-order high-Q continuous-time filters
Author :
Sumesaglam, T. ; Karsilayan, A.I.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
9/12/2002 12:00:00 AM
Abstract :
A digital tuning scheme for automatic tuning of high-order high-Q continuous-time filters is proposed. The scheme uses phase information for both centre frequency and Q tuning, and does not rely on the relation between the passband gain and Q factor. Digital control of frequency and Q tuning loops improves the stability by enabling only one loop at a given tuning cycle. High-order filter tuning is performed without separating individual sections, eliminating switches and their parasitics
Keywords :
Q-factor; band-pass filters; circuit stability; circuit tuning; continuous time filters; digital circuits; digital control; Q tuning loops; active filters; automatic tuning; centre frequency; continuous-time filters; digital control; digital tuning scheme; frequency tuning loops; high-Q filters; high-order filters; phase information; stability;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20020720
