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Precision bipolar current-mode digital-to-analog converter

  • US 9,735,798 B2
  • Filed: 08/07/2014
  • Issued: 08/15/2017
  • Est. Priority Date: 08/07/2013
  • Status: Expired due to Fees
First Claim
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1. A precision digital-to-analog converter (DAC) for converting digital data to a bipolar analog signal, comprising:

  • digital-to-analog converter circuitry configured to provide, responsive to digital input data, a first analog current signal having a first potential set by a voltage source external to the DAC, and a second analog current signal having a second potential;

    subtractor circuitry configured to provide a bipolar current signal by subtracting the second analog current signal from the first analog current signal, the bipolar current signal having a zero center point; and

    first control circuitry electrically coupled to the subtractor circuitry and to the digital-to-analog converter circuitry, and configured to modify the second potential so that the second potential equals the first potential.

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