Deflection circuit for a television receiver using symmetrical d

Details Deflection circuit for a television receiver using symmetrical d Deflection circuit for a television receiver using symmetrical d

1993-02-22

1997-02-04

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315393, 315371, G09G 104, H01J 2970

Patent

active

056002122

ABSTRACT:
A deflection method and circuit for symmetrical horizontal scanning in a television tube utilizes a vertical deflection coil and an auxiliary vertical deflection coil. The vertical deflection coil is energized with a sawtooth vertical scanning current having a first slope during vertical trace to generate a first vertical deflection field. The auxiliary vertical deflection coil is energized with a sawtooth vertical auxiliary current having a line frequency and a second slope during horizontal trace equal but opposite to the first slope of the vertical scanning current to generate a second vertical deflection field. The first and second vertical deflection fields are superimposed in the tube to produce a stepped vertical deflection field.

REFERENCES:
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patent: 2728027 (1955-12-01), Scull, Jr.
patent: 3449620 (1969-06-01), Caron et al.
patent: 3749964 (1973-07-01), Hirata
patent: 3757162 (1973-09-01), Johnson
patent: 3882360 (1975-05-01), Williams, Jr.
patent: 4988927 (1991-01-01), Spruck
patent: 5119056 (1991-06-01), Itoh et al.

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