Protection circuit for improper line voltage

Details Protection circuit for improper line voltage Protection circuit for improper line voltage

1986-08-27

1988-03-15

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358243, 358 74, 363 50, H04N 563

Patent

active

047316551

ABSTRACT:
A video display apparatus includes a protection circuit for preventing damage due to the application of excessively high line voltage. The video display apparatus includes a start-up circuit that provides power to initiate operation of a switching voltage regulator. In response to an improperly high line voltage, the start-up circuit is disabled and the video display apparatus does not become operative.

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Millman, "Micro-Electronics Digital and Analog Circuits and Systems", 1979, p. 680.
Grafham and Hey, "SCR Manual 5th Edition General Electric", 1972, pp. 209-210.

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