I'm working on a Voltage to Frequecy Converter project, and I design AD652 in dual power supply and positive input mode. But the output wave of AD652 have some problem——The duty of the output wave always change. The wave picture is below:
What I am sure is that the output frequency increases when the input voltage increases. And the clock picture is below:
I am not sure whether it matters.
Besides, I want to know the reason of the output problem? and how to deal with it?