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Automatic tuning of linearly tunable high-Q filters

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3 Author(s)
Karsilayan, A.I. ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA ; Sung-Ling Huang ; De Lima, J.A.

A new tuning scheme for linearly tunable high-Q filters is proposed. The tuning scheme uses the phase information for both frequency and Q factor tuning, therefore no relationship between filter's passband magnitude and Q is required. To reduce the simulation overhead, operation of the tuning circuit is verified on a symbolic filter whose parameters were derived from the transistor level circuit. At 10 MHz, for a desired Q of 20, simulated frequency and Q tuning errors are 0.3% and 1.7%, respectively.

Published in:

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

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