| 摘要 |
PURPOSE:To prevent the photography of more than a necessary number of frames by providing a counter for the snapshotting of several frames and stopping a motor when the photography of several frames is completed in continuous shooting mode. CONSTITUTION:This describes an example of a counter 80 for three-frame continuous shooting and the counter consists of two D type FFs 102 and 103 and NAND circuits 104 and 105; when a negative pulse signal is inputted from an NOR circuit 81 to reset terminals of the FFs 102 and 103, the FFs 102 and 103 are reset to generate an output L at an output terminal Q and an output H at an output terminal Q', and while the NAND circuit 104 generates an output L, the NAND circuit 105 generates an output H. The FFs 102 and 103 read signal inputted to an input terminal D when the output signal of an NAND circuit 79 rises from L to H, and the FF102 is inverted when the 1st negative pulse signal is inputted to a clock terminal CK from the NAND circuit 70 after resetting, so that an output H appears at the output terminal Q and an output L appears at the output terminal Q'. The NAND circuit 104 goes up from L to H by the inversion of the FF102 and is held in this state until it is reset again. |
