Method of and apparatus for biasing switches

  • US 9,667,244 B1
  • Filed: 11/16/2015
  • Issued: 05/30/2017
  • Est. Priority Date: 11/16/2015
  • Status: Active Grant
First Claim
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1. A switch responsive to a switch control signal, the switch comprising one or more stages, at least a first one of the stages comprises:

  • a first signal terminal;

    a second signal terminal;

    an electrically controllable impedance connected between the first and second signal terminals, the electrically controllable impedance arranged to vary its impedance in response to a stage control signal; and

    a stage control circuit having a first control circuit input configured to receive a switch control signal;

    where the stage control circuit has a second control circuit input responsive to a signal voltage at either the first signal terminal or the second signal terminal, a low pass filter is provided in a path of the signal voltage, and the stage control circuit is adapted to generate the stage control signal as function of voltage at the first and second control circuit inputs.

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