High voltage vertical dynamic focus amplifier

Details High voltage vertical dynamic focus amplifier High voltage vertical dynamic focus amplifier

1994-05-11

1995-07-04

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2958

Patent

active

054303583

ABSTRACT:
A current transformer has a primary side winding coupled to a source of horizontal rate sawtooth yoke current and a secondary side in which a horizontal rate AC signal is developed. A rectifier has at least one capacitor, the rectifier receiving the horizontal rate AC signal and energizing a DC voltage across the at least one capacitor. A modulator for the DC voltage generates a first deflection rate waveform. A capacitor coupled to the modulator and to the secondary side of the transformer generates a second deflection rate waveform. The first and second deflection rate waveforms are combined to define a vertical dynamic focus voltage signal.

REFERENCES:
patent: 4549216 (1985-10-01), Yuki

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