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Programmable monolithic Gm-C band-pass filter: design and experimental results

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Abstract

We propose in this paper a programmable band-pass filter based on an array of fully differential transconductance circuits that controls the filter parameters. The signal path does not contain any switch, and fine-tuning of the filter parameters is implemented using programmable capacitors. A digital building block is implemented in the proposed band-pass filter to tune its central frequency as well as its bandwidth. The filter circuit is based on a biquad topology, which is designed and implemented with CMOS 0.18 μm technology. Experimental results show a programming ability of the center frequency between 5.9 and 58 MHz, and the quality factor can be tuned from 0.36 to 10. These features are obtained for a total power consumption of less than 10.5 mW from a single 1.8 V power supply.

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Acknowledgments

The authors would like to thank the Natural Sciences and Engineering Research Council of Canada (NSERC) for the financial support and the Canadian Microelectronics Corporation (CMC Microsystems) for providing the design tools.

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Authors and Affiliations

  1. Polystim Neurotechnologies Laboratory, Department of Electrical Engineering, Ecole Polytechnique de Montréal, Quebec, Canada

    Eric Lebel, Ali Assi & Mohamad Sawan

  2. Department of Electrical Engineering, United Arab Emirates University, Al Ain, UAE

    Ali Assi

Authors
  1. Eric Lebel
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  2. Ali Assi
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  3. Mohamad Sawan
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Correspondence to Eric Lebel.

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Lebel, E., Assi, A. & Sawan, M. Programmable monolithic Gm-C band-pass filter: design and experimental results. Analog Integr Circ Sig Process 54, 21–29 (2008). https://doi.org/10.1007/s10470-007-9117-x

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  • DOI: https://doi.org/10.1007/s10470-007-9117-x

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