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Remote monitoring system transmitter and power supply therefor

  • US 4,583,073 A
  • Filed: 01/31/1983
  • Issued: 04/15/1986
  • Est. Priority Date: 01/31/1983
  • Status: Expired due to Term
First Claim
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1. A transmitter for transmitting digital information comprising:

  • (a) means for providing the digital information;

    (b) power means associated with a secondary of a power distribution transformer for providing power to the transmitter;

    (c) DPSK means, synchronized to the zero crossings of the power means, for converting the digital information into differentially phase shift keyed (DPSK) information;

    (d) modulator means for modulating a carrier signal with the DPSK information;

    (e) amplifier means, powered by said power means, for amplifying the modulated carrier signal;

    (f) transmitter means for transmitting the amplified, modulated carrier signal along the secondary of the power distribution transformer; and

    (g) said power means providing substantially no power to said amplifier means during phase transitions occurring during the conversion by the DPSK means.

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