S-correction circuit for a video display

Details S-correction circuit for a video display S-correction circuit for a video display

1986-02-26

1987-02-24

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2956

Patent

active

046459855

ABSTRACT:
An automatic S-correction circuit for a deflection circuit includes an active source of generally sawtooth current having an amplitude that is proportional to the deflection frequency. The sawtooth current and a deflection current that flows in a deflection winding are combined as a current flowing in an S-capacitor that develops a parabolic voltage. The amplitude of the parabolic voltage is automatically adjusted to be at a level that is required for maintaining proper S-correction for any deflection frequency within a continuous, wide range of frequencies.

REFERENCES:
patent: 3428853 (1969-02-01), Akatsu
patent: 4423358 (1983-12-01), den Hollander
patent: 4468593 (1984-08-01), Haferl
patent: 4501995 (1985-02-01), Olmstead et al.
patent: 4516058 (1985-05-01), Haferl
patent: 4533855 (1985-08-01), Willis et al.

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