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Programmable Switched Capacitor Finite Impulse Response Filter with Circular Memory Implemented in CMOS 0.18 μm Technology

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Abstract

This paper presents a programmable multi-mode finite impulse response (FIR) filter implemented as switched capacitor (SC) technique in CMOS 0.18 μm technology. Intended application of the described circuit is in analog base-band filtering in GSM/WCDMA systems. The proposed filter features a regular structure that allows for elimination of some parasitic capacitances, thus significantly improving the filtering accuracy. Due to its modularity that allows for dividing the circuit into two separate sections, the circuit can be easily reconfigured to work as either infinite impulse response (IIR) or as finite impulse (FIR) filter. One of the key components that allows for this multi-mode operation is the proposed programmable and ultra low power multiphase clock circuit. The 24-taps filter for the sampling frequency of 30 MHz dissipates power of 4.5 mW from a 1.8 V supply.

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Authors and Affiliations

  1. Institute of Microtechnology, University of Neuchâtel, Rue A.-L. Breguet 2, CH-2000, Neuchâtel, Switzerland

    Rafał Długosz

  2. Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, T6G 2V4, Canada

    Rafał Długosz

  3. CMOS Emerging Technologies Inc., 2865 Stanley Pl, Coquitlam, BC, V3B 7L7, Canada

    Krzysztof Iniewski

Authors
  1. Rafał Długosz
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  2. Krzysztof Iniewski
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Correspondence to Rafał Długosz.

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Fellow of the Marie Curie Outgoing International Fellowship

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Długosz, R., Iniewski, K. Programmable Switched Capacitor Finite Impulse Response Filter with Circular Memory Implemented in CMOS 0.18 μm Technology. J Sign Process Syst Sign Image Video Technol 56, 295–306 (2009). https://doi.org/10.1007/s11265-008-0233-3

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  • DOI: https://doi.org/10.1007/s11265-008-0233-3

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