| 摘要 |
<p>PURPOSE:To obtain the video signal with good quality and to improve the operativity, by providing the means producing the signal driving the CCD and relating member in the hand scanner, in using CCD as photoelectric conversion element. CONSTITUTION:The photoelectric conversion element CCD4 in the hand scanner 1 requires 4-phase clock pulse and the storage and readout sections connected to the CCD respectively require the same clock pulse. The drive circuit 10 produced the pulse and it is provided in the hand scanner 1. The drive circuit 10 only receives the master clock from the signal processing section 11 and it produces the 4-phase clock pulse required by taking this clock as the reference and supplies to each section.</p> |
