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AMPLIFIER HAVING A VIRTUAL GROUND AND METHOD THEREOF

  • US 20090179697A1
  • Filed: 01/11/2008
  • Published: 07/16/2009
  • Est. Priority Date: 01/11/2008
  • Status: Active Grant
First Claim
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1. An amplifier comprising:

  • a first modulation circuit having an input for receiving a first input signal, and an output for providing a first modulated output signal, the first modulated output signal corresponding to the first input signal;

    a second modulation circuit having an input for receiving a second input signal, and an output for providing a second modulated output signal, the second modulated output signal corresponding to the second input signal;

    a third modulation circuit having an input for receiving a third input signal, and an output for providing a third modulated output signal, the third modulated output signal corresponding to the third input signal and for providing a virtual ground;

    a first amplifier circuit coupled to the outputs of the first and third modulation circuits, the first amplifier circuit for driving a first load; and

    a second amplifier circuit coupled to the outputs of the second and third modulation circuits, the second amplifier circuit for driving a second load.

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