Sequential color switch for beam penetration CRT

Details Sequential color switch for beam penetration CRT Sequential color switch for beam penetration CRT

1981-05-01

1982-06-29

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

358 73, H01J 2980

Patent

active

043374212

ABSTRACT:
An improved sequential color switch for a beam penetration CRT includes a high voltage power supply and a high voltage transformer. A feedback circuit senses the DC level in the signal waveform applied to the transformer and feeds it back to the input of a driver. A low-pass filter connected to the input of the driver also senses the DC level in the signal waveform applied to the driver and adjusts the reference input of the high voltage power supply to correspondingly change its DC high voltage output level. Essentially, this removes any DC level from the primary winding of the high voltage transformer while at the same time adjusting the output level of the high voltage power supply connected to the secondary winding of the transformer by an amount which is proportional to the average DC level of the input signal waveform.

REFERENCES:
patent: 3492416 (1970-01-01), Weber
patent: 3863097 (1975-01-01), Labudda
patent: 3887838 (1975-06-01), Thurston
patent: 3906333 (1975-09-01), Kalmanash
patent: 3914617 (1975-10-01), Corbel
patent: 4092566 (1978-05-01), Chambers et al.
patent: 4104564 (1978-08-01), Cohen et al.
patent: 4151444 (1979-04-01), Jenness
patent: 4281272 (1981-07-01), Spilsbury

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