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Transmission-reception circuit

  • US 5,499,269 A
  • Filed: 07/15/1994
  • Issued: 03/12/1996
  • Est. Priority Date: 07/20/1993
  • Status: Expired due to Fees
First Claim
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1. A transmission-reception apparatus, including a first transmission-reception circuit connected to one end of a single transmission line, and a second transmission-reception circuit connected to the other end of the transmission line, for transmitting and receiving a signal over said transmission line between said first transmission-reception circuit and said second transmission-reception circuit, whereinsaid first transmission-reception circuit includes a first transmitter circuit connected to said transmission line for transmitting a signal to, said second transmission-reception circuit, and a first receiver circuit connected to said transmission line for receiving a signal from said second transmission-reception circuit;

  • said second transmission-reception circuit includes a second transmitter circuit connected to said transmission line for transmitting the signal to said first transmission-reception circuit, and a second receiver circuit connected to said transmission line for receiving the signal from said first transmission-reception circuit;

    a first power unit is disposed in the vicinity of said first transmission;

    reception circuit to supply electric power required for said first transmission-reception circuit;

    a second power unit is disposed in the vicinity of said second transmission-reception circuit to supply electric power required for said second transmission-reception circuit;

    a power supply line includes a first power supply wire connected between said first power unit and said second receiver circuit, and a second power supply wire connected between said second power unit and said first receiver circuit;

    a threshold voltage for logical decision on a receiving signal of said first receiver circuit is supplied from said second power unit through said power supply line; and

    a threshold voltage for logical decision on a receiving signal of said second receiver circuit is supplied from said first power unit through said power supply line.

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