Gullwing distortion corrected deflection circuitry for a square-

Details Gullwing distortion corrected deflection circuitry for a square- Gullwing distortion corrected deflection circuitry for a square-

1985-05-10

1987-07-21

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315368, H01J 2956

Patent

active

046820850

ABSTRACT:
Line and field deflection circuits generate line and field deflection currents in respective line and field deflection windings to scan a raster on the phosphor screen of a square-planar picture tube having an aspherical faceplate. The asphericity of the faceplate subjects the scanned raster to gullwing distortion. A gullwing distortion correction circuit is responsive to signals repeating at line and field rates, respectively, for modulating the field deflection current during a line deflection period within the field deflection trace interval in a manner that corrects gullwing distortion of a corresponding raster scan line.

REFERENCES:
patent: 4329671 (1982-05-01), Gross et al.
"RCA Solid State '74 Databook Series-SSD-202B", Application Note ICAN-6668, dated 11/73, entitled Applications of the CA3080 and CA3080A High-Performance Operational Transconductance Amplifiers, pp. 63-78.
"Telefunken Sprecher", No. 68, Feb. 1976, pp. 3-33.

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