| 摘要 |
<p>An electronic strobe circuit for flash cameras or flash attachments in which a capacitive energy storage circuit is discharged into a flash tube to provide illumination in synchronism with the opening of the camera shutter. The strobe includes a charging circuit for gradually charging the storage circuit toward a predetermined charge level sufficient for illuminating the flash tube to a desired intensity upon opening of the shutter and a charge limiting circuit including a balanceable bridge coupled to the storage circuit and a detecting device for inhibiting operation of the charging circuit whenever the voltage across the flash tube reaches a desired level. The charge limiting circuit causes the storage circuit to be operated in an intermittent or pulsating manner when it reaches the desired flash voltage, the pulsating nature of the limiting circuit being additionally utilized to provide an audio-visual indication to the operator when the storage circuit is fully charged.</p> |
