Flash apparatus

Details Flash apparatus Flash apparatus

1999-05-25

2000-11-14

Vu, David

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

396205, 315219, H05B 3700

Patent

active

061474606

ABSTRACT:
In a power supply device for a flash apparatus having the primary winding side of a transformer and an oscillation-controlling switching element connected in parallel to a power supply and the secondary winding side of the transformer connected to a main capacitor through a rectifier element, a current-to-voltage conversion circuit is arranged to output a voltage signal according to a current flowing from the secondary winding side of the transformer to the main capacitor, and the main capacitor is charged by on-off controlling the switching element according to the voltage signal outputted from the current-to-voltage conversion circuit.

REFERENCES:
patent: 4251753 (1981-02-01), Kondo

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