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An automatic tuning scheme for high frequency bandpass filters

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

An automatic tuning scheme for continuous-time bandpass filters based on a frequency synthesizer and a peak detector is proposed. A gm-C second-order filter is designed to demonstrate the proposed tuning scheme. The circuit is designed in AMI 0.5μm process. The measured frequency tuning error is 0.25%, and the Q tuning error is 3% for a 200 MHz filter with desired Q of 28.6.

Published in:

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on  (Volume:3 )

Date of Conference: