Charging circuit for stroboscope

Details Charging circuit for stroboscope Charging circuit for stroboscope

1998-03-02

2000-08-15

Vu, David

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315241P, 396205, H04B 3700

Patent

active

061041440

ABSTRACT:
A conventional stroboscope circuit in use for a film camera has encountered with problems that charging of a main capacitor is incapable when other functions of the camera are operated and that a charging operation is delayed. To solve aforesaid problems, the present invention is to charge the capacitor C1 for a flashlight illumination by a use of a stroboscope charging circuit 1. During that, a usual charging operation is performed by feeding a higher current which flows through a transistor Q1, in a manner wherein a control signal CTL is switched to an H (a high) level status. When the other functions of the camera are operated on the contrary, the charging is performed by feeding a lower current which flows through a resistor R1, wherein the control signal CTL is switched to an L (a low) level status.

REFERENCES:
patent: 4075536 (1978-02-01), Stevens
patent: 4951081 (1990-08-01), Hosomizu et al.
patent: 5159381 (1992-10-01), Harrison
patent: 5661372 (1997-08-01), Ishimaru et al.

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