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Digital-to-analog converter with improved performance and method therefor

  • US 5,220,326 A
  • Filed: 03/30/1992
  • Issued: 06/15/1993
  • Est. Priority Date: 03/30/1992
  • Status: Expired due to Term
First Claim
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1. A digital-to-analog converter with improved performance comprising:

  • a scaler having an input coupled for receiving a first digital signal, and an output for providing said first digital signal scaled by a predetermined amount;

    a sigma-delta modulator having an input coupled to said scaler, and an output for providing a second digital signal; and

    an analog summing network having inputs for receiving respective bits of said second digital signal, and an output for providing an analog signal of the digital-to-analog converter;

    said predetermined amount greater than or equal to a loss of dynamic range of said sigma-delta modulator.

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