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A high frequency bandpass continuous-time filter with automatic frequency and Q-factor tuning

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2 Author(s)

A second order high frequency CMOS bandpass filter with automatic frequency and Q-factor tuning is presented. The frequency tuning is based on the phase-locked-loop technique. A new charge pump circuit and a new quality factor tuning scheme are proposed. The circuit was designed using AMI 0.5 u CMOS process. Simulation results of a bandpass filter working at 100 MHz with expected Q of 20 and 50 are presented

Published in:

Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on  (Volume:1 )

Date of Conference:

6-9 May 2001