| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drive unit the dynamic range of which can be widened during high speed drive when compared with prior art. <P>SOLUTION: The drive unit includes an FPGA 20 and a first store-and-forward pulse output unit 41. The FPGA 20 includes a drive voltage setting unit 22 outputting a low level control signal when the shooting speed is less than a shooting speed threshold, otherwise outputting a high level control signal. The first store-and-forward pulse output unit 41 includes a voltage conversion element 41a outputting VH=12 V when the low level control signal is input, and outputting VH=13.5 V when the high level control signal is input, a voltage conversion element 41b outputting VL=0 V when the low level control signal is input, and outputting VL=-1.5 V when the high level control signal is input, and a driver element 41c outputting a store-and-forward pulse ϕM1 having a frequency corresponding to the shooting speed based on the VH and VL. <P>COPYRIGHT: (C)2013,JPO&INPIT |
