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Methods and apparatus for detecting the envelope of RF power signals

  • US 20040018821A1
  • Filed: 04/18/2003
  • Published: 01/29/2004
  • Est. Priority Date: 06/03/2002
  • Status: Active Grant
First Claim
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1. A method for detecting an envelope of an RF signal, comprising:

  • (a) providing an RF transistor operating essentially at a nonlinear operating point at the RF frequency range, said RF transistor being fed by a DC power supply through an RF filter and terminated by a dummy load for RF components in an output signal of said RF transistor;

    (b) feeding an RF signal into a input of said RF transistor; and

    (c) obtaining an output signal representing said envelope from a fluctuating current drawn by said RF transistor from said DC power supply during a time period when said RF signal is applied to said input.

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