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Amplifier circuit having an output transistor for driving a complex load

  • US 7,642,854 B2
  • Filed: 06/06/2007
  • Issued: 01/05/2010
  • Est. Priority Date: 06/06/2007
  • Status: Active Grant
First Claim
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1. An amplifier circuit, comprising:

  • an output transistor configured to drive a complex load over a drive frequency range, wherein in a lower part of the range an inductive component of the load dominates, and in an upper part of the range the inductive component does not dominate;

    a current mirror circuit portion upstream of the output transistor; and

    a shunt path configured to reduce a DC current flowing through the output transistor without substantially affecting an AC current flowing through the output transistor.

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