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High frequency signal power detector

  • US 7,113,754 B2
  • Filed: 08/21/2003
  • Issued: 09/26/2006
  • Est. Priority Date: 08/21/2003
  • Status: Expired due to Fees
First Claim
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1. A signal power detector comprises:

  • an input coupling circuit operably coupled to receive a signal and to convert the signal into a first input and a rectifying input;

    a rectifying operational amplifier including;

    first input transistor operably coupled to receive the first input;

    second input transistor;

    rectifying transistor operably coupled to receive the rectifying input;

    current source operably coupled to provide a reference current to the first input transistor, second input transistor, and the rectifying transistor;

    first active input load transistor operably coupled to provide a first active load for the first input transistor and the rectifying transistor;

    second active input load transistor operably coupled to provide a second active load for the second transistor;

    active output load transistor operably coupled to mirror the reference current; and

    output transconductance stage operably coupled to the active load transistor and to the first input transistor and the rectifying transistor, wherein the output transconductance stage provides a rectified output representing a peak value of the signal; and

    a charge pump operably coupled to convert the rectified output into a corresponding current, wherein the corresponding current represents power of the signal.

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