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Endpoint transmitter and power generation system

  • US 7,102,490 B2
  • Filed: 07/24/2003
  • Issued: 09/05/2006
  • Est. Priority Date: 07/24/2003
  • Status: Expired due to Term
First Claim
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1. An apparatus for transmitting data to a distribution substation, wherein the distribution substation is configured to receive encoded data in a power signal on a distribution line in a power distribution network, the apparatus comprising:

  • a transformer that includes a primary winding that is coupled to the distribution line and a secondary winding that is coupled between a first node and a second node;

    a half-bridge drive circuit that is configured to selectively assert a first drive signal and second drive signal in response to a control signal;

    a first driver that is coupled between a first power-supply node and a common node, wherein the first driver is arranged to couple the first power-supply node to the common node when the first drive signal is asserted;

    a second driver that is coupled between the common node and a second power-supply node, wherein the second driver is arranged to couple the common node to the second power-supply node when the second drive signal is asserted; and

    a resonant circuit that is coupled between the first node and the common node, wherein the resonant circuit has a natural resonant frequency in an audio frequency range, and wherein the half-bridge driver is arranged to selectively activate the first and second drivers such that the distribution line is modulated with a square-wave signal at a frequency that is associated with the encoded data.

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