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Telephone hybrid circuit

  • US 5,602,912 A
  • Filed: 01/17/1996
  • Issued: 02/11/1997
  • Est. Priority Date: 05/16/1994
  • Status: Expired due to Term
First Claim
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1. A method for providing a telephone hybrid function comprising the steps of:

  • connecting a first input of a telephone hybrid function means for providing a telephone hybrid function to a first telephone line conductor;

    connecting ground of said telephone hybrid function means to a second telephone line conductor, isolating ground of said telephone hybrid function means from earth ground;

    receiving a telephone line signal at said first input of said telephone hybrid function means, said telephone line signal comprising a first transmit signal and a receive signal;

    receiving a second transmit signal at a second input of said telephone hybrid function means;

    highpass filtering said telephone line signal;

    highpass filtering said second transmit signal;

    converting said receive signal to a differential receive signal, using a converting means;

    canceling said first and second transmit signals using a canceling means, to prevent said first and second transmit signals from being outputted;

    outputting said differential receive signal, without outputting said first and second transmit signals.

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