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Reduction of supply current variations using compensation current control

  • US 9,225,252 B2
  • Filed: 03/11/2014
  • Issued: 12/29/2015
  • Est. Priority Date: 03/11/2013
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a controller to control a switching power converter, wherein the controller includes;

    first circuitry that, during at least one operational time period of the controller, is configured to draw a time varying operational current from an external power source; and

    a compensation current control circuit to generate a compensation current control signal to control a draw of a compensation current from the external power source by second circuitry so that an average sum of the time varying operational current and the compensation current is approximately constant as the operational current varies in time during the operational time period.

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