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Noise suppression apparatus for FM receiver

  • US 5,036,543 A
  • Filed: 06/26/1990
  • Issued: 07/30/1991
  • Est. Priority Date: 06/30/1989
  • Status: Expired due to Fees
First Claim
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1. A noise suppression apparatus for an FM receiver comprising:

  • amplifying means (6,7) for extracting a noise component from an FM detected signal;

    noise detecting means (8,9) for outputting a control signal when a level of said noise component exceeds a predetermined level;

    gate means (3) through which said FM-detected signal passes, said gate means being closed by said control signal to inhibit the passage of said FM-detected signal;

    d-c signal producing means for producing a d-c signal in accordance with an output level of said amplifying means (6,7) to control a gain of said amplifying means (6,7);

    stereo separation control means (22) for continuously varying a stereo separation between a left channel and a right channel of a speaker output of the FM receiver in accordance with said level of the noise component when said noise component decreases below a predetermined level; and

    high frequency response control means (23) for continuously varying frequency responses of said left and right channels in accordance with said level of the noise component when said noise component decreases below a predetermined level.

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