Corner raster distortion correction circuit

Details Corner raster distortion correction circuit Corner raster distortion correction circuit

1989-06-26

1990-05-22

Tarcza, Thomas H.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315389, H01J 2956, H01J 2970

Patent

active

049272195

ABSTRACT:
When a diode modulator is used in a television receiver for correcting pin-cushion distortion, circuitry is included in a diode modulator driver circuit, having an operational amplifier for summing various input voltages, for providing additional correction for distortions in the corners of the raster display. This additional circuitry removes any DC component in the output signal of the driver circuit, passes only that portion of the output signal exceeding a predetermined threshold level, and negatively feeds back this signal as an input to the operational amplifier.

REFERENCES:
patent: 4827194 (1989-05-01), Fernsler

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