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Reduction of audible artifacts in an audio system

  • US 7,279,965 B2
  • Filed: 06/13/2005
  • Issued: 10/09/2007
  • Est. Priority Date: 06/13/2005
  • Status: Active Grant
First Claim
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1. An audio system comprising:

  • a switch mode amplifier that provides an output signal at an output for driving a load based on at least one control signal; and

    a control system that provides the at least one control signal to control the amplifier according to an operating mode of the audio system, in a first mode, the control system providing the at least one control signal to actively control an equivalent output impedance at the output of the amplifier, gradually adjusting the equivalent output impedance from a high-impedance state to a low impedance state, so as to mitigate a voltage drop across the load when the amplifier is activated to a second mode corresponding to the low impedance state.

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