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High-Q CMOS LC pseudo switched-capacitor bandpass filter with center frequency tuning

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3 Author(s)
El Oualkadi, A. ; Dept. of Electr. Eng., Univ. Catholique de Louvain, Louvain-la-Neuve ; Cordeau, D. ; Paillot, J.-M.

The design of a new high-Q LC pseudo switched-capacitor bandpass filter is presented. The proposed filter is tuned by using a command circuit made up by a ring voltage controlled oscillator (VCO) with 'XOR' gates. Fabricated in a standard 0.35 mum CMOS, this circuit is intended to replace the SAW filters in wireless broadband applications. Measured results demonstrate interesting performances; a tunable center frequency range of 285 MHz [240-525 MHz] and a quality factor that can be as high as 300 within the tunable frequency range

Published in:

Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on

Date of Conference:

21-24 May 2006