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RF power amplifier output power sensor

  • US 6,329,809 B1
  • Filed: 01/27/2000
  • Issued: 12/11/2001
  • Est. Priority Date: 08/27/1999
  • Status: Expired due to Term
First Claim
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1. Amplifier circuitry comprising:

  • a) a radio frequency power amplifier for amplifying a radio frequency input signal and having;

    i) a radio frequency amplifier input for receiving the radio frequency input signal, ii) a bias input for receiving a bias signal for biasing the radio frequency power amplifier, and iii) a power amplifier output providing an amplified radio frequency signal;

    b) a first transistor circuit having;

    i) a first input for receiving the radio frequency input signal, ii) a first bias input for receiving the bias signal, and iii) a first output providing a first output signal having a bias component and a radio frequency component proportionally smaller than the amplified radio frequency signal; and

    c) a second transistor circuit having;

    i) a second bias input for receiving the bias signal, and ii) a second output for providing second output signal corresponding to the bias component.

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