Vertical deflection circuit

Details Vertical deflection circuit Vertical deflection circuit

1994-02-18

1995-11-07

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315387, 315384, 315397, H01J 2970, H01J 2976

Patent

active

054650321

ABSTRACT:
A vertical deflection circuit includes a first pin which receives a forward scanning voltage having a first level and a first frequency. During a flyback period a second pin receives a flyback voltage having a second level higher that the first level and a second frequency higher than the first frequency. A third voltage source provides a first pulse. A switch means selectively couples the first pin and the third voltage source in response to a vertical blanking signal. The vertical blanking signal is differentiated to provide a differentiated signal and a voltage divider applies the differentiated signal to the switch to apply the first pulse to the first pin.

REFERENCES:
patent: 5089755 (1992-02-01), Wilber
Abstract of German 34 36 304 A1, pub. date Apr. 10, 1986.
IBM Technical Disclosure Bulletin vol. 31, No. 5 Oct. 1988 pp. 434-435 "Low Power Dissipation Vertical Deflection Circuit Using A Commercial Monolithic Integrated Circuit".
IBM Technical Disclosure Bulletin vol. 27 No. 3 Aug. 1984 pp. 1797-1798 "Active Frame Flyback Circuit For CRT".

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