Electronic flash system with control of commutation capacitor

Details Electronic flash system with control of commutation capacitor Electronic flash system with control of commutation capacitor

1984-07-25

1986-09-02

Moore, David K.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315240, 354416, H05B 4132

Patent

active

046098518

ABSTRACT:
An electronic flash including a discharge flash tube controlled by a first switch and a commutation capacitor for controlling the first switch. There is provided a second switch for governing the operation of the commutation switch. A charging circuit is provided for charging the commutation capacitor and includes a resistor connecting the commutation capacitor with an electric power source. The resistor has a resistance value which is small enough to allow a current not smaller than a current at which the second switch is turned off.

REFERENCES:
patent: 3878429 (1975-04-01), Iwata
patent: 3998534 (1976-12-01), Schulze et al.
patent: 4214825 (1980-07-01), Mizokami
patent: 4217523 (1980-08-01), Hirata
patent: 4494044 (1985-01-01), Kataoka
patent: 4510419 (1985-04-01), Takematsu

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