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Wireless remote speaker system

  • US 4,847,903 A
  • Filed: 12/02/1987
  • Issued: 07/11/1989
  • Est. Priority Date: 05/22/1987
  • Status: Expired due to Term
First Claim
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1. A device for receiving stereophonic FM signals, including at least two different carrier frequencies modulated with stereophonic audio information, from AC power lines and for converting the frequency modulated carrier frequency signals to stereophonic audio signals comprisinginput means coupled to said AC power lines for receiving FM signals;

  • first and second stereophonic demodulating channels, each channel including;

    band-pass notch filter means coupled to said input means for passing one of said carrier frequencies, rejecting the other carrier frequency and filtering out noise on said AC power lines;

    amplifier means coupled to said band-pass/notch filter means for amplifying the passed frequency modulated carrier signal; and

    demodulating means coupled to said amplifier means for demodulating the passed frequency modulated carrier signal to produce a respective one of said stereophonic audio signals therefrom; and

    output means coupled to the demodulating means of both channels for outputting said stereophonic audio signals.

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