Tunable bipolar and biCMOS Gm-C filters for high-frequencies

  • Hans Voorman
  • Hugo Veenstra


We consider known, modified and new transistor circuits for transconductors as well as their application in integrated tunable Gm-C filters for high frequencies, that is for hundreds of MHz until more than 1 GHz. The transconductor circuits use NPN bipolar transistors and in most of the examples also vertical PNP transistors. The low delay and low input capacitance of the new circuits makes them particularly suitable for application at very high frequencies. Their high power efficiency and low noise lead to an unusually low power consumption in combination with a high signal-to-noise ratio. Their circuit simplicity yields low cost.


Stray Capacitance Resonance Circuit Filter Section Load Circuit Transistor Circuit 
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  1. [1]
    Continuous-time analog integrated filters’ by J.O. Voorman in ‘Integrated continuous-time filters’ edited by Y.P. Tsividis and J.O. Voorman, pp. 15–45, 1993.Google Scholar
  2. [2]
    A 3.0 V 40 Mb/s Hard Disk Drive read channel IC’ by G.A. De Veirman, et al.,IEEE Journal of Solid-State Circuits 30, pp. 788–799, 1995.Google Scholar
  3. [3]
    Log domain filtering for RF applications’ by D.R. Frey, IEEE Journal of Solid-State Circuits 31, pp. 1468–1475, 1996.Google Scholar
  4. [4]
    Noise and dissipation of electronic gyrators’ by D. Blom and J.O. Voorman, Philips Research Reports 26, pp. 103–113, 1971.Google Scholar
  5. [5]
    See [1]: page 28, fig. 27.Google Scholar
  6. [6]
    See [1]: pages 32, figures 33 and 34 and 188, figures 4 and 5.Google Scholar
  7. [7]
    Dual-DFE read/write channel IC for hard-disk drives’ by J.W.M. Bergmans, et al., IEEE Transactions on Magnetics 34, pp. 172–177, 1998.Google Scholar
  8. [8]
    See [1]: page 43, fig. 54.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1999

Authors and Affiliations

  • Hans Voorman
    • 1
  • Hugo Veenstra
    • 1
  1. 1.Philips Research LaboratoriesEindhovenThe Netherlands

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