Circuit for correcting deflection distortion

Details Circuit for correcting deflection distortion Circuit for correcting deflection distortion

1974-06-17

1976-07-06

Wilbur, Maynard R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2956

Patent

active

039684032

ABSTRACT:
A circuit for correcting vertical deflection distortion of an image displayed by a cathode ray tube is composed of first, second, third, fourth, fifth and sixth transistors, a common load connected to output electrodes or collectors of the first and fourth transistors and a variable DC source connected to a control electrode or base of the sixth transistor. A saw-tooth signal having the vertical deflection frequency is applied to a control electrode or base of the third transistor, and the first and firth transistors and the second and fourth transistors are differentially switched at a rate corresponding to the horizontal deflection frequency so as to obtain from the load a signal for correcting vertical pincushion distortion.

REFERENCES:
patent: 3712999 (1973-01-01), Smeulers et al.
patent: 3740611 (1973-06-01), Slavik

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