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Reducing noise during a gain change

  • US 7,729,675 B2
  • Filed: 12/08/2006
  • Issued: 06/01/2010
  • Est. Priority Date: 12/08/2006
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a front end amplifier to adjust a level of an incoming radio signal;

    an analog-to-digital converter (ADC) coupled to the front end amplifier to digitize the incoming radio signal and provide the digitized incoming radio signal to a signal path; and

    a gain compensation input coupled to the signal path to provide a gain change compensation signal received from a gain change compensation circuit to remove a level change present in the incoming radio signal after a change to a control value for the front end amplifier received from a controller, wherein the gain change compensation circuit includes a gain compensation path coupled to the gain compensation input, the gain compensation path including a first summer to sum a compensation signal with a feedback signal, a delay element coupled to an output of the first summer, and a second summer coupled between an output of the delay element and the gain compensation input.

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