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DC compensation system for a wireless communication device configured in a zero intermediate frequency architecture

  • US 6,560,448 B1
  • Filed: 10/02/2000
  • Issued: 05/06/2003
  • Est. Priority Date: 10/02/2000
  • Status: Expired due to Term
First Claim
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1. A DC compensation system for a wireless communication device configured in a zero intermediate frequency (ZIF) architecture, comprising:

  • a combiner that combines a DC offset signal with an input signal and that provides an adjusted input signal;

    a gain amplifier that receives the adjusted input signal and that provides an amplified input signal based on a gain adjust signal;

    a gain feedback circuit that receives the amplified input signal, that estimates input signal power and that provides the gain adjust signal in an attempt to maintain the input signal power at a target power level;

    a DC estimator that estimates a DC level in the amplified input signal and that provides a DC estimate signal;

    a DC amplifier that receives the DC estimate signal and that provides the DC offset signal based on a gain conversion signal; and

    a gain converter that receives the gain adjust signal and that provides the gain conversion signal to the DC amplifier.

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