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Digital tuning of continuous-time high-Q filters

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

A digital tuning scheme for automatic tuning of continuous-time high-Q filters is proposed. The tuning scheme uses the phase information for both frequency and Q factor tuning; therefore the relationship between the filter's passband magnitude and Q is immaterial. Due to the digital control of tuning loops, only one loop is active at a given time interval, which eliminates the need for slow Q tuning loop, improves stability and reduces tuning time. Experimental tests on the breadboard verify the operation where approximately 1% tuning error is accomplished.

Published in:

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on  (Volume:5 )

Date of Conference: