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Gain control circuit, communication device, electronic appliance, and gain control method

  • US 9,184,718 B2
  • Filed: 03/07/2012
  • Issued: 11/10/2015
  • Est. Priority Date: 03/16/2011
  • Status: Active Grant
First Claim
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1. A gain control circuit comprising:

  • a first amplifier for amplifying an input signal; and

    a signal determination unit for determining the input signal to be input to the first amplifier, and controlling an amplification factor of the first amplifier based on a determination result,wherein a control loop is provided at a following stage of the first amplifier, for detecting a level of an output signal of the first amplifier and controlling the amplification factor of the first amplifier based on the detected level of the output signal.

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