Inhibit circuit for an electronic flash charge circuit
AssigneeSeiko Koki Kabushiki Kaisha
InventorsShinji Nagaoka, Yuzuru Takazawa
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Abstract
In a camera of the type including an electronic flash light unit with an oscillating circuit and an electronic shutter which are both supplied with power from a common power supply, an inhibit circuit for an electric flash charge circuit is provided in which a base of the transistor in the oscillating circuit is connected to the output terminal of the exposure control circuit via a semi-conductor switching element. The semi-conductor switching element stops oscillation in the electric flash charge circuit while the exposure control circuit is in operation.
Claims3
In a camera control circuit including an electro-magnet for controlling the exposure completion time, an exposure control circuit having a shutter control circuit for controlling the electro-magnet, an electric flash circuit having an oscillation transistor forming an oscillation circuit, and a power supply to be applied in common with said exposure control circuit and said electric flash circuit, the improvement comprising:
- a semi-conductor switching means arranged between the output terminal of the shutter control circuit for controlling said electro-magnet and the base of said oscillation transistor for keeping said oscillation transistor inoperative during the time in which said electro-magnet is energized.
Dependencies are inferred from the claim text.