Drive circuit for a horizontal output transformer

Details Drive circuit for a horizontal output transformer Drive circuit for a horizontal output transformer

1982-05-13

1985-07-16

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

315408, 358190, H01J 2970

Patent

active

045299170

ABSTRACT:
Circuitry is described for driving the primary winding of a horizontal output transformer without the use of a conventional drive transformer. The horizontal output transistor is coupled to a tap on the output transformer and is switched off and on to excite the transformer. The horizontal output transistor is driven, in turn, by a driver transistor whose collector is also coupled to a tap on the output transformer such that adequate power is derived from the transformer to drive the output transistor into saturation. The driver transistor receives horizontal scan rate pulse from input circuitry which is preferably adapted to provide a path to ground for stored charges in the output transistor so that it may be rapidly turned fully off when a scan pulse terminates.

REFERENCES:
patent: 3970779 (1976-07-01), Takahashi
patent: 4393337 (1983-07-01), Nagai et al.

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