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System and method of altering a PWM carrier power spectrum

  • US 7,821,440 B2
  • Filed: 08/19/2009
  • Issued: 10/26/2010
  • Est. Priority Date: 04/01/2008
  • Status: Active Grant
First Claim
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1. A circuit device to produce an output signal with suppressed common mode carrier power, the circuit device comprising:

  • differential inputs to receive differential pulse-width modulated (PWM) signals; and

    a pulse edge control circuit coupled to the differential inputs and configured to phase-shift or chop the differential PWM signals according to a control signal to generate a modulated PWM output signal with suppressed common mode carrier power.

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