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System and method for RF signal amplification

  • US 6,738,432 B2
  • Filed: 03/21/2001
  • Issued: 05/18/2004
  • Est. Priority Date: 03/21/2001
  • Status: Expired due to Term
First Claim
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1. An amplifier circuit comprising:

  • an amplifier input to receive a RF input signal;

    at least two power amplifier branches coupled to said amplifier input, each said power amplifier branch selectively enabled to generate a branch output signal by amplifying said RF input signal while operating in a saturated mode;

    an amplifier output to combine said branch output signals into a RF output signal; and

    an amplitude modulation circuit to selectively provide power to said power amplifier branches, and to impart a desired amplitude modulation to said RF output signal by modulating said power provided to said power amplifier branches responsive to an amplitude information signal.

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