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Power amplifying circuit and automatic power control method

  • US 6,169,455 B1
  • Filed: 06/01/1999
  • Issued: 01/02/2001
  • Est. Priority Date: 06/02/1998
  • Status: Expired due to Fees
First Claim
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1. A power amplifying circuit comprising:

  • an APC (automatic power control circuit) loop for causing an output power level to comply with a set output power level automatically, and an efficiency control loop for detecting power efficiency by calculating the power efficiency based on an input voltage, an input current and the output power level and controlling the bias value of an amplifier arranged in the power amplifying circuit.

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