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A novel automatic tuning scheme for high-frequency high-Q continuous-time filters

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1 Author(s)
Karsilayan, A.I. ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

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

Published in:

Mixed-Signal Design, 2001. SSMSD. 2001 Southwest Symposium on

Date of Conference:

2001