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Power line communication transmitter with amplifier circuit

  • US 8,958,487 B2
  • Filed: 12/22/2011
  • Issued: 02/17/2015
  • Est. Priority Date: 12/22/2011
  • Status: Active Grant
First Claim
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1. A transmitter circuit configured and arranged to communicate over power distribution lines that carry power using alternating current (AC) that operates at a power-line frequency, the transmitter circuit comprising:

  • an amplifier circuit configured and arranged to;

    receive a first data signal in the form of a carrier wave that is modulated to represent data bits; and

    convert the first data signal to a pulse density modulation (PDM) encoded signal using high frequency pulses that introduce high frequency components;

    a low-pass filter configured and arranged to filter the high frequency components of the PDM encoded signal to produce a second data signal, such that the second data signal is an amplification of the first data signal; and

    a coupling circuit configured and arranged to communicatively couple the second data signal from the low-pass filter to the power distribution lines and to filter the power-line frequency.

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