Vertical deflection circuit

Details Vertical deflection circuit Vertical deflection circuit

1985-11-04

1987-09-08

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315387, 315408, H01J 2970

Patent

active

046926704

ABSTRACT:
A vertical deflection circuit for a CRT tube, with a so-called Mirror integration circuit, has an integration arrangement with a resistor and a capacitor, and a first amplifier for amplifying saw-tooth wave by the integration arrangement with a deflection coil coupled with output of the amplifier. A first feedback path is located between the deflection coil and the capacitor has been improved by a second feedback path between the deflection coil and input of the first amplifier. The second feedback path provides the sum of the parabolic voltage at the end of the deflection coil which is grounded through a second capacitor and a second resistor, and the saw-tooth wave voltage responsive to the current in the deflection coil to the first amplifier. The second feedback path provides the so-called S-shaped compensation on a screen so that a picture distortion, due to a non-arc face of a screen at peripheral portions, is compensated.

REFERENCES:
patent: 4176300 (1979-11-01), Waeher
patent: 4414494 (1983-11-01), Schmidt

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