Title :
A novel automatic tuning scheme for high-frequency high-Q continuous-time filters
Author :
Karsilayan, Aydin Ilker
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
An automatic tuning scheme for high-frequency high-Q continuous time biquadratic filters is proposed. The method is based on tuning the slope of the phase response around the pole frequency. The value of Q is digitally controlled and does not depend on the filter´s bandpass gain, which may be quite different than Q in the presence of dominant parasitics. Therefore, very high-frequency high-Q filters can be tuned accurately. Digital phase locked loops and frequency dividers are employed by the tuning circuit
Keywords :
Q-factor; UHF filters; biquadratic filters; circuit tuning; continuous time filters; digital phase locked loops; frequency dividers; automatic tuning scheme; bandpass gain; biquadratic filters; digital phase locked loops; dominant parasitics; frequency dividers; high-frequency high-Q continuous-time filters; phase response; pole frequency; Active filters; Automatic control; Band pass filters; Digital control; Digital filters; Frequency locked loops; Q factor; Transceivers; Transfer functions; Tuning;
Conference_Titel :
Mixed-Signal Design, 2001. SSMSD. 2001 Southwest Symposium on
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-6742-1
DOI :
10.1109/SSMSD.2001.914951
