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

  • Hans Voorman
  • Hugo Veenstra

Abstract

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.

Keywords

Stray Capacitance Resonance Circuit Filter Section Load Circuit Transistor Circuit 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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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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