Gullwing distortion correction circuit

Details Gullwing distortion correction circuit Gullwing distortion correction circuit

1987-09-29

1988-10-11

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315370, H01J 2956

Patent

active

047774126

ABSTRACT:
A gullwing distortion correction signal and a north-south pincushion distortion correction signal are generated and then summed to form a sum signal. The sum signal is coupled to a primary winding of a transformer. A secondary winding of the transformer is coupled in a current path of a vertical rate deflection current for modulating the deflection current in a manner that reduces the gullwing and north-south pincushion distortions. The secondary winding is included in a resonant circuit that is tuned to resonate at the horizontal frequency.

REFERENCES:
patent: 4642530 (1987-02-01), Rodriguez-Cavazos
patent: 4668897 (1987-05-01), Haferl
patent: 4682085 (1987-07-01), Haferl et al.
patent: 4687972 (1987-08-01), Haferl
Telefunken Sprecher, No. 68, Feb. 1976, pp. 3-33.

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