Remote control

Details Remote control Remote control

1989-03-23

1991-04-02

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

340310R, 328173, H04L 2706

Patent

active

050051873

ABSTRACT:
In the field of powerline carrier transmission and reception for remote control, a slave receiver counts cycles of carrier in a time window near to a zero-crossing of the power main. The receiver is implemented using discrete components (1,2,3) and a microprocessor. The discrete components form an input filter (1), a limiting preamplifier (2), a demodulator and noise filter (3) and, along with the microprocessor, a system (4) to detect the zero-crossing points. A capacitor is charged and discharged, depending upon the rate of occurrence of carrier cycles to produce a binary signal dependent on the digital value present on the carrier. By measuring the length of time the binary signal is in one of its states in said time window, the microprocessor determines whether the signal resulted from noise or not.

REFERENCES:
patent: 2901541 (1959-08-01), Kenyon
patent: 3376514 (1968-04-01), Womack et al.
patent: 4392233 (1983-07-01), Laughner
patent: 4627078 (1986-12-01), Stoner
patent: 4636771 (1987-01-01), Ochs
patent: 4675579 (1987-06-01), Hardy et al.
patent: 4746897 (1988-05-01), Shuey

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