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Digital automatic gain controller for satellite transponder

  • US 5,687,195 A
  • Filed: 06/01/1995
  • Issued: 11/11/1997
  • Est. Priority Date: 12/16/1994
  • Status: Expired due to Term
First Claim
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1. A digital automatic gain controller for a satellite transponder, comprising:

  • amplification means for amplifying a radio frequency signal detected by a detector diode of an output level controller by a difference between the detected radio frequency signal and a temperature compensation signal;

    control means for inputting an output signal from said amplification means and outputting the inputted signal as a telemetry signal to an earth control station, said control means adjusting an output level of a radio frequency channel in response to a telecommand signal from said earth control station based on the telemetry signal; and

    conversion means for converting the adjusted output level of the radio frequency channel from said control means into a drive current for driving a PIN diode attenuator of the output level controller, wherein an output of the PIN diode attenuator is amplified and inputted into the detector diode through a filter.

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