手册中CLPOB这一输入信号的波形未给出,有没有用过的人指导一下这个波形应该是什么样子的
Guoliang Li:
OB pixel period (CLPOB)?没有做过这方面的,不太清楚。帮楼主顶下了。
不过楼主可以直接测量一下吧。带宽应该不超过VSP5010的31MHZ吧
dao tian:
回复 Guoliang Li:
现在的问题是这个波形不给的话AD好像不工作,但是不知道要给怎么样的,下面是手册上的一段话:
Each channel has an optical black level clamp circuit (OB loop) and automatically compensates offsets of theCCD and CDS/SH during the OB pixel period (CLPOB). The OB level output value can be set at a required valuethrough the serial interface. DC bias lost in ac coupling is reproduced as an input clamp voltage, which is thenecessary level for internal operation. Input clamp voltage is charged to a capacitor that is connected to CCDINduring a dummy pixel period (INPUTCLP) by SHP.
我的理解是和象元同步信号一样的一个波形,不知道对不对