| 摘要 |
PURPOSE:To simplify the circuit constitution of a control circuit by inhibiting counting operation from starting with a resetting reset signal generated later by the end of the clocking operation when plural resetting reset signals are generated, and placing a clocking counter in a clocking state again with a resetting reset signal which is generated after the end. CONSTITUTION:The T type flip-flops 2-8 in a counter array C are so connected that the Q terminal of one stage is connected to the T terminal of the next stage. Both inputs to a NOR gate 13 fall to L simultaneously with the start of the extension of a lens and the output rises to H to release the T type flip- flop 2-8 in the counter array C from being reset, so that the counter array C begins to clock the time at the same time. When the lens is set back to a specific reset position, the output of a lens driving circuit 16 falls rises H and the counter array C is reset, so that detection operation for an abnormal lens stop is completed. When a film beings to be wound, a terminal (a) of a film driving circuit 26 goes up to H and the counter array C is reset and starts clocking the time. Consequently, even if plural resetting reset signals are generated, the respective clocking operations are performed by one clocking counter and the circuit constitution is simplified. |
