Electric lamp and discharge devices: systems – Cathode ray tube circuits – Power supply from deflection circuit source
Patent
1978-08-14
1980-02-12
Hubler, Malcolm F.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Power supply from deflection circuit source
358190, H01J 3100
Patent
active
041885686
ABSTRACT:
A circuit for selectively supplying current to the horizontal oscillator from one of two voltage sources. The first voltage source is primarily used to supply current to the horizontal output stage and supplies the oscillator only during startup of the horizontal deflection system. The second source is derived from a winding on the flyback transformer and supplies current to the oscillator after the startup period, that is, after its voltage or another or other voltages developed by sources derived from flyback windings have reached values sufficient to assure sustained operation of the horizontal deflection system. A startup detector responsive to a flyback-derived voltage determines which of the two voltage sources provides current at the output of the starting network, that is, at the power supply terminal of the horizontal oscillator.
REFERENCES:
patent: 3621134 (1971-11-01), Waring
patent: 3814851 (1974-06-01), Nakagawa et al.
patent: 3947632 (1976-03-01), Giger et al.
patent: 4112465 (1978-09-01), Willis
patent: 4127875 (1978-11-01), Fernsler et al.
GTE Sylvania Incorporated
Hubler Malcolm F.
Odozynski John A.
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