System for applying a high voltage source to a CRT through a cap

Details System for applying a high voltage source to a CRT through a cap System for applying a high voltage source to a CRT through a cap

1982-03-18

1984-08-21

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307595, 307265, 307311, H03K 17687, H03K 326

Patent

active

044672241

ABSTRACT:
A system for applying a high test voltage to a CRT through a high capacitance load includes two serially connected MOSFETs which have opposite polarities. A video input pulse triggers one MOSFET through an opto-isolation network. The video pulse is delayed and triggers the other MOSFET. The trigger pulses are the same polarity and only one of the MOSFETs can conduct at a given time. The capacitive load is coupled between the MOSFETs and received a high voltage short time pulse when one of the MOSFETs is conductive. The use of two MOSFETs permits the testing of both cathode driven and grid driven CRTs.

REFERENCES:
patent: 2122499 (1938-07-01), Stocker
patent: 3649851 (1972-03-01), Cohen
patent: 3656004 (1972-04-01), Kemerer et al.
patent: 4283639 (1981-08-01), Roesler
patent: 4293875 (1981-10-01), Katz
patent: 4311922 (1982-01-01), Puckette
patent: 4329600 (1982-05-01), Stewart
patent: 4359650 (1982-11-01), Newcomb
patent: 4363978 (1982-12-01), Heimbigner
patent: 4409639 (1983-10-01), Wesner

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