Fully integrated high-Q switched capacitor bandpass filter with center frequency and bandwidth tuning

El Oualkadi, A.;El Kaamouchi, Majid;Paillot, J.-M.;Vanhoenacker-Janvier, Danielle;Flandre, Denis
(2007) 2007 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium — Location: Honolulu, HI, USA (3.June.2007)

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Authors
  • El Oualkadi, A.
    Author
  • El Kaamouchi, MajidUCLouvain
    Author
  • Paillot, J.-M.
    Author
  • Vanhoenacker-Janvier, DanielleUCLouvain
    Author
  • Flandre, DenisUCLouvain
    Author
Abstract
This paper proposes to study the design of a novel high-Q fully integrated switched capacitor bandpass filter. This circuit, implemented in CMOS technology, allows a tunable high selectivity over a broad frequency band. The proposed architecture is intended to replace passive surface acoustic wave (SAW) filters in low-cost wireless radio-communication applications. To show the feasibility of the proposed filter a prototype has been fabricated and tested. Measurements show quality factors up to 300, and a tunable center frequency range of 290 MHz [240-530 MHz] with a bandwidth tuning.
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