High voltage shutdown circuit for a television receiver

Details High voltage shutdown circuit for a television receiver High voltage shutdown circuit for a television receiver

1976-02-27

1978-04-04

Birmiel, Howard A.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

358243, H01J 2970

Patent

active

040829863

ABSTRACT:
The television receiver horizontal deflection transformer develops retrace pulses from which the high voltage is generated. A shutdown safety circuit arrangement monitors a predetermined minimum width of retrace pulse by comparing it with the duration of a locally produced standard pulse to determine an excess high voltage condition. When such a condition occurs, voltage is applied to the horizontal driver for disabling the deflection system.

REFERENCES:
patent: 3970780 (1976-07-01), Minoura
patent: 4013923 (1977-03-01), DEN Hollander

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