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System and method for current-mode amplitude modulation

  • US 6,785,521 B2
  • Filed: 03/21/2001
  • Issued: 08/31/2004
  • Est. Priority Date: 03/21/2001
  • Status: Expired due to Term
First Claim
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1. A power amplifier circuit comprising:

  • a power amplifier biased for saturated mode operation to generate an RF output signal by amplifying a constant-envelope RF input signal; and

    a current source responsive to an amplitude information signal to modulate a supply current of said power amplifier to impart desired amplitude modulation to said RF output signal.

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