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Need help on AD8036 chip application

Question asked by abforce on Mar 3, 2014
Latest reply on Mar 22, 2014 by abforce

Hello:

 

I am using an AD8036 clamping amplifier in this scheme

scheme.jpg

It is used to clamp a square wave with boundaries +3.8V and +1.2V at 9KHz. Output is connected to a UMJ-123-D14-G VCO.  This is the output I get:

squarewave.jpg

Now I got very strange rising edge and falling edge (please click on the figures to get a bigger one).

rising edge.jpg falling edge.jpg

Could someone please explain the reason and give me some advise to solve this problem?  I need high speed, high accuracy on timing (low jitters of rising and falling) and very stable voltage step.  Change another chip is also appreciable.

 

Sincerely

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