Power Line Data Communication Using Current Modulation
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United States of America Patent
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Issued Date -
Dec 20, 2012
app pub date -
Jun 14, 2011
filing date -
Jun 14, 2011
priority date (Note) -
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Abstract
A system and a method effective to transmit information about a load that draws a load current to a recipient. The system includes a sensor effective to generate a first signal containing information about the load and a reference second signal. A first device calculates a ratio of the first signal to the second signal and converts that ratio into a binary number. A second device converts 0 members of the binary number to a first data current and 1 members of the binary number into a second data current that is different from the first data current. A common electrical line transmits a total current that is a sum of the load current plus the first data current or a sum of the load current plus the second data current. The recipient communicates with the common electrical line and converts current modulations to the binary number and the binary number to the information.
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