Horizontal deflection circuit with high voltage selection capabi

Details Horizontal deflection circuit with high voltage selection capabi Horizontal deflection circuit with high voltage selection capabi

1977-05-13

1978-07-18

Hubler, Malcolm F.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

358243, H01J 2980

Patent

active

041018150

ABSTRACT:
A television receiver circuit includes a voltage regulator with a feedback circuit for providing a regulated B+ operating voltage, a horizontal deflection circuit including a resonant retrace circuit for generating a scanning current in a deflection winding for producing a raster, a high voltage circuit for providing an ultor voltage for beam current, and a high voltage protection circuit for disabling normal operation of the horizontal deflection circuit when the ultor voltage exceeds a predetermined magnitude. An impedance is included and is capable of being selectively coupled to the feedback circuit. A capacitance is also included and is capable of being selectively coupled to the resonant retrace circuit. Both means combined are selectively capable of decreasing the ultor voltage for preventing unnecessary disabling of the horizontal deflection circuit while maintaining a constant raster width.

REFERENCES:
patent: 3649901 (1972-03-01), Waltner
patent: 3706023 (1972-12-01), Yamada et al.
patent: 3840784 (1974-10-01), Schauffele
patent: 3881135 (1975-04-01), Dietz
patent: 3885198 (1975-05-01), Pritchard et al.
patent: 4013923 (1977-03-01), Hollander

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