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Method and circuit for controlling power amplifiers

  • US 20030137355A1
  • Filed: 01/18/2002
  • Published: 07/24/2003
  • Est. Priority Date: 01/18/2002
  • Status: Active Grant
First Claim
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1. A bias controller comprising:

  • a bias detector operable to detect a bias current associated with a device controlled by the bias controller and produce a proportional sensed bias voltage;

    a reference comparator operable to compare the bias voltage to a reference voltage and produce a first control signal operable to adjust a bias output of the bias controller;

    a memory component storing a plurality of reference voltage settings, one for each mode of operation of the device, the memory component including a mode setting input and a reference voltage output signal; and

    a reference voltage adjustment circuit adjusting the reference voltage applied to the reference comparator in accordance with the mode of the device as controlled by the reference voltage output signal.

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