Isolated B+ voltage sensing, high-voltage shutdown

Details Isolated B+ voltage sensing, high-voltage shutdown Isolated B+ voltage sensing, high-voltage shutdown

1978-07-28

1980-01-22

Hubler, Malcolm F.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

358190, H01J 3100

Patent

active

041852346

ABSTRACT:
A shutdown circuit both electrically and magnetically isolated from the horizontal deflection circuit and the flyback transformer. The voltage across a winding magnetically coupled to an inductive element carrying the current required by the deflection circuit and the flyback transformer is detected. The horizontal deflection circuit is disabled in response to voltages above a predetermined value. In an Iso-Hot type receiver having an oscillator coupled to the deflection circuit by an optically operating drive circuit, the drive circuit is rendered optically non-transmitting.

REFERENCES:
patent: 4047078 (1977-09-01), Meehan
patent: 4074323 (1978-02-01), Griffey
patent: 4090111 (1978-05-01), Suzuki
patent: 4101815 (1978-07-01), Willis

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