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Satellite receiver

  • US 5,134,707 A
  • Filed: 10/23/1990
  • Issued: 07/28/1992
  • Est. Priority Date: 10/26/1989
  • Status: Expired due to Term
First Claim
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1. A satellite broadcasting receiver for converting an FM signal into a fixed intermediate frequency by a mixing circuit also having an oscillation circuit connected thereto, demodulating the fixed intermediate frequency in a demodulation circuit after passing it through one filter, and delivering a signal from a demodulation signal processing circuit operatively connected to an output of the demodulation circuit, comprising:

  • an output level setting means for setting a predetermined amplitude of the demodulation signal;

    a comparing means for comparing the amplitude of the demodulation signal with the predetermined amplitude;

    a modulation driving means for supplying the demodulation signal to the oscillation circuit while continuously changing the amplitude and polarity of the demodulation signal in response to an output of the comparing means; and

    an AGC voltage generating means for generating an AGC voltage for controlling the input level to the demodulator according to the polarity of the demodulation signal supplied to the oscillation circuit.

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