Centering circuits employed for beam deflection circuits

Details Centering circuits employed for beam deflection circuits Centering circuits employed for beam deflection circuits

1974-10-07

1976-03-16

Hubler, Malcolm F.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2970

Patent

active

039448827

ABSTRACT:
A centering circuit employed for a deflection circuit having a series connection of a deflection coil and a capacitor for deflecting an electron beam in a cathode ray tube, which comprises a coil connected at one end thereof to a connecting point between the deflection coil and the capacitor, a pair of diodes connected at their respective one ends in parallel with opposite polarity to the other end of the coil and a potentiometer connected between the respective other ends of the pair of diodes and having a movable tap connected to a reference potential terminal. The potentiometer controls respective currents flowing through the pair of diodes with the movement of the movable tap to vary the average value of current flowing through the coil. The deflection coil is supplied with a centering current varying in accordance with the average value of the current flowing through the coil.

REFERENCES:
patent: 2637832 (1953-05-01), Rogers
patent: 2646527 (1953-07-01), Mathes
patent: 2953679 (1960-09-01), Rush et al.
patent: 3489948 (1970-01-01), Buechel

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