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Variable gain amplifier

  • US 7,397,302 B2
  • Filed: 04/13/2007
  • Issued: 07/08/2008
  • Est. Priority Date: 04/03/2004
  • Status: Active Grant
First Claim
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1. A method for varying gain of an amplifier array comprising:

  • enabling a first amplifier stage having an input signal with a first amplitude;

    controlling gain of said first amplifier stage to increase said gain up to a maximum for said first amplifier stage;

    enabling a second amplifier stage in parallel with said first amplifier stage, said second amplifier stage having an input signal with a second amplitude different from said first amplitude;

    controlling gain of said second amplifier stage to increase gain up to a maximum for said second amplifier stage;

    wherein the step of controlling gain of said amplified stage includes implementing a control law for amplitude gain versus a control setting characteristic of a gain control; and

    summing outputs of said enabled amplifier stages.

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