Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1979-09-20
1981-09-15
Hubler, Malcolm F.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315389, 315397, H01J 2970
Patent
active
042899940
ABSTRACT:
Disclosed is a vertical drive circuit for a cathode ray tube in a video display in which sawtooth current waveform corrections for the deflection yoke are made by means of an S-correction feedback loop featuring DC-coupling and low frequency filtering. The amplified correction signal is transmitted to a push-pull type output stage for driving the deflection yoke. Power consumption is reduced and operation made more efficient by an approximate doubling of the retrace voltage applied to the push-pull output stage during retrace by means of a discharging capacitor network.
REFERENCES:
patent: 3426245 (1969-02-01), Yurasek et al.
patent: 3842311 (1974-10-01), Knox
patent: 3965390 (1976-06-01), Spencer, Jr.
patent: 3983452 (1976-09-01), Bazin
patent: 3991345 (1976-11-01), Jaspers
patent: 4052645 (1977-10-01), Fujita
patent: 4184105 (1980-01-01), Skelton
patent: 4203056 (1980-05-01), Itoh
Beaumont Gregory J.
Matthews Lloyd E.
Hill Thomas E.
Hubler Malcolm F.
Zenith Radio Corporation
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