Vertical deflection S-correction with picture height compensatio

Details Vertical deflection S-correction with picture height compensatio Vertical deflection S-correction with picture height compensatio

1993-07-14

1994-09-06

Powell, Mark R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315408, H01J 2956

Patent

active

053451520

ABSTRACT:
A differential amplifier formed by a pair of transistor couples a vertical sawtooth signal to an input side of a vertical deflection amplifier. Nonlinearity of the transistor pair provides linearity or S-correction in the vertical direction. The amplitude of the sawtooth signal is adjusted by way of adjusting a vertical height control signal. To compensate for a change in the S-correction that is introduced by the amplitude adjustment, the vertical height control signal is coupled to the emitters of the transistor pairs for controlling the nonlinearity.

REFERENCES:
patent: 4176300 (1979-11-01), Waehner
patent: 4692670 (1987-09-01), Imaizumi
patent: 5229692 (1993-07-01), Wilber
patent: 5243263 (1993-09-01), Koblitz et al.
patent: 5264762 (1993-11-01), Wilber
An article entitled A New Video Processor For Color TV in the names of Yamamoto et al., dated 1988 and published by IEEE.

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