Switchable high voltage generator for penetration-type color CRT

Details Switchable high voltage generator for penetration-type color CRT Switchable high voltage generator for penetration-type color CRT

1977-09-26

1979-07-10

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

307 77, 307 75, 315170, 315172, 320 1, H04N 927, G05F 156, H02J 100, H01J 2980

Patent

active

041609964

ABSTRACT:
A very high voltage generator switchable between n levels for supplying a capacitative receiver, such as the screen of a polychrome display tube, and comprising a high voltage DC power source suitable for delivering two extreme levels of voltage straddling the n DC voltage levels. The power source is connected to the receiver via at least one series assembly of transistors for each direction of conduction between the power source and the receiver; each series assembly is associated with a control channel for the transistors elaborating an image signal of the error voltage between the value of voltage at the terminals of the receiver and the required level for the operation of each assembly as a switch, at least one of the control channels also comprising a modulator in which the image signal modulates the voltage of an oscillator for the operation of the corresponding assembly as a switching and regulating circuit connected in series with the receiver.

REFERENCES:
patent: 3161778 (1964-12-01), Harrison et al.
patent: 3659190 (1972-04-01), Galluppi
patent: 3697880 (1972-10-01), Melchior et al.
patent: 3723855 (1973-03-01), Shuleshko
patent: 3892977 (1975-07-01), Bierly
patent: 3914617 (1975-10-01), Corbel
patent: 4104564 (1978-08-01), Cohen et al.

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