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

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

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.

Aydin Ilker Karsilayan

[1] R. Schaumann,et al. Design of a 4-MHz analog integrated CMOS transconductance-C bandpass filter , 1988 .

[2] Aydin Ilker Karsilayan,et al. Mixed-mode automatic tuning scheme for high-Q continuous-time filters , 2000 .

[3] Edgar Sánchez-Sinencio,et al. An Accurate Quality Factor Tuning Scheme for IF and High-Q Continuous-Time Filters , 1999 .

[4] M. A. Tan,et al. The problem of on-chip automatic tuning in continuous-time integrated filters , 1989, IEEE International Symposium on Circuits and Systems,.

[5] Mohammed Ismail,et al. A wide range differential difference amplifier: a basic block for analog signal processing in MOS technology , 1993 .

[6] E. Sanchez-Sinencio,et al. A practical quality factor tuning scheme for IF and high-Q continuous-time filters , 1998, 1998 IEEE International Solid-State Circuits Conference. Digest of Technical Papers, ISSCC. First Edition (Cat. No.98CH36156).

[7] Mohammed S. Ghausi,et al. Design of analog filters : passive, active RC, and switched capacitor , 1990 .

[8] Siew Kuok Hoon,et al. An accurate self-bias threshold voltage extractor using differential difference feedback amplifier , 2000, 2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353).