Load control circuit

Details Load control circuit Load control circuit

1986-05-09

1987-07-14

Dixon, Harold

Electric lamp and discharge devices: systems

Plural power supplies

Plural load devices

315243, 315244, 315DIG4, 315DIG7, H05B 3700

Patent

active

046805087

ABSTRACT:
An electrical load controller includes a combination of switches for selecting a desired load output level, an electronic custom gate array for converting the switch signals to a parallel binary number, a parallel to serial data encoder for converting the multi-bit parallel data signal into a multi-bit serial data signal, a frequency shift key connected to a resonant circuit generating a controllable high frequency signal and for shifting the high frequency either up or down from the center frequency coupled to a power line to transmit the binary serial data onto the power line. The system also includes a fail-safe construction so that, should the control system fail, the load will be operable. The system provides continuous communication from the controller to the power line, so that should noise interfere with one data transmission, subsequent data transmission will provide correct data to the load, thereby making load control nearly immune to extraneous noise on the power line.

REFERENCES:
patent: 4359670 (1982-11-01), Hosaka et al.
patent: 4392086 (1983-07-01), Ide et al.
patent: 4479215 (1984-10-01), Baker
patent: 4604552 (1986-08-01), Alley et al.
patent: 4612479 (1986-09-01), Zansky

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