Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1977-02-18
1978-10-03
Farley, Richard A.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315399, H01J 2970, H01J 2976
Patent
active
041186575
ABSTRACT:
In a circuit arrangement for providing a periodic saw-tooth current in a coil, e.g. a kinescope deflector coil, comprising a one-way conducting device that connects the coil to a voltage source, and a controllable switching device having a control electrode connectable to a periodic pilot-pulse source that makes the switching device conductive during part of the saw-tooth cycle, the switching device being connectable to a current source through an induction coil, including a capacitor that is charged by the current source by means of the induction coil when the switching device is not conductive, the improvement wherein the capacitor is connected to the primary winding of a transformer, the secondary winding of the latter being connected to the one-way conducting device, and wherein the time during which the switching device conducts and the capacitor discharges are longer than the return time of the saw-tooth cycle.
REFERENCES:
patent: 3195009 (1965-06-01), Poorter
patent: 3638067 (1972-01-01), Dietz
patent: 3889156 (1975-06-01), Arya
Blum T. M.
Collard Allison C.
Farley Richard A.
Galgano Thomas M.
Thein Tab T.
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