Pulse or digital communications – Pulse position – frequency – or spacing modulation
Patent
1992-05-18
1995-05-30
Chin, Stephen
Pulse or digital communications
Pulse position, frequency, or spacing modulation
370 8, H03K 704, H03K 706, H03K 904, H04J 1500
Patent
active
054208858
ABSTRACT:
A communication device is arranged to send a communication signal in the form of code pulses down an electric fence line which is energized by electric pulses from a fence energizer. The code pulses are generated to be distinct and separate from the electric pulses generated to energize the fence. A controller is included to control the charge and discharge of an energy storage device to generate at least the code pulses to be transmitted along the electric fence line. A coupling device is also included to couple both the code pulses and the electric fence energizing signal to the fence.
REFERENCES:
patent: 2981854 (1961-04-01), Grace et al.
patent: 3378694 (1968-04-01), Griffith
patent: 3736509 (1973-05-01), Munn
patent: 4297633 (1981-10-01), McCutchan et al.
patent: 4380746 (1983-04-01), Sun et al.
patent: 4859868 (1989-08-01), McKissack
Chin Stephen
Gallagher Electronics Limited
Kobayashi Duane
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