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Digital tuning of analog bandpass filters based on envelope detection

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

A digital automatic tuning technique for analog high-Q bandpass filters is proposed. The technique is based on envelope detection and magnitude comparison at three reference frequencies. The digital approach provides reliability with more robust control of frequency and Q tuning by enabling only one loop at a time. Accurate tuning is achieved since the scheme does not assume a direct relation between the passband gain and Q factor of filter.

Published in:

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on  (Volume:1 )

Date of Conference:

23-26 May 2004