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Analog Circuit Design pp 33–67Cite as

1-V Log-Domain Filters

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Abstract

The basic principle of log-domain circuits is introduced and its suitability for the realization of low-voltage (LV) and low-power (LP) continuous-time filters is established. The main limitations of practical implementations including noise are discussed and the advantage of the combination of companding and class AB operation is highlighted. Examples of BiCMOS and standard digital CMOS realizations operating at supply voltages as low as 1 V are presented. A comparison between classical gm-C and log-domain continuous-time filters is drawn on the basis of the power consumption per pole and edge frequency normalized to the dynamic range. This comparison shows that log-domain filters are more power saving than more traditional filters.

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Author information

Authors and Affiliations

  1. Rockwell Semiconductor Systems, Newport Beach, CA, 92660, USA

    Christian Enz

  2. Electronics Laboratory, Swiss Federal Institute of Technology (EPFL), CH-1015, Lausanne, Switzerland

    Manfred Punzenberger

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  1. Christian Enz
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  2. Manfred Punzenberger
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Editors and Affiliations

  1. Delft University of Technology, Delft, The Netherlands

    Johan Huijsing

  2. Eindhoven University of Technology, Eindhoven, The Netherlands

    Rudy van de Plassche

  3. Katholieke Universiteit Leuven, Belgium

    Willy Sansen

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© 1999 Springer Science+Business Media Dordrecht

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Enz, C., Punzenberger, M. (1999). 1-V Log-Domain Filters. In: Huijsing, J., van de Plassche, R., Sansen, W. (eds) Analog Circuit Design. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-2983-2_2

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  • DOI: https://doi.org/10.1007/978-1-4757-2983-2_2

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4419-5071-0

  • Online ISBN: 978-1-4757-2983-2

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