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Combined data and power transmission

  • US 5,859,584 A
  • Filed: 11/14/1996
  • Issued: 01/12/1999
  • Est. Priority Date: 12/06/1995
  • Status: Expired due to Term
First Claim
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1. A combined data and power transmission arrangement comprising one or more power supplies and loads interconnected by a power transmission line, and transmitters and receivers for transmitting a digital data signal over the transmission line,wherein the transmitter and receiver each include an inductor for providing a high impedance barrier to a data signal on the line, so as to isolate the data signal from the power supply and load,and wherein the receiver includes means for averaging the data signal to produce a threshold value, and a comparator having a first input which receives the data signal from the line, a second input which receives said threshold value, and an output which provides an output signal, said threshold value comprising a controlled positive feedback signal derived from said output of the comparator.

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