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Ground partitioned power amplifier for stable operation

  • US 8,604,873 B2
  • Filed: 12/02/2011
  • Issued: 12/10/2013
  • Est. Priority Date: 12/05/2010
  • Status: Active Grant
First Claim
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1. A power amplifier system comprising:

  • a signal path comprising a plurality of cascaded gain stages and an output stage the input of which is coupled to the output of the last gain stage of the plurality of cascaded gain stages, wherein at least one local positive feedback loop is created in the signal path by one or more shared ground connections between one or more of the plurality of cascaded gain stages and the output stage; and

    a neutralizing feedback loop configured to control at least one negative feedback loop to balance the at least one local positive feedback loop.

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