Hi,
I have attached a picture of my circuit. This is a control circuit for a MEMS capacitor but the operation isn't hugely important. The issue I am having is in measuring the output voltage. I have modelled a scope probe as being a 10MΩ resistance to ground. The problem is the output resistance of my circuit is quite high so 10MΩ is not enough and the current is just all sinking through this rather than going to my load capacitor CL1. Can anyone recommend a way for me to accurately measure the output? One idea I had was to place an opamp buffer at the output but I'm hoping to get other suggestions too.
Thanks for your time
Rachel
I have attached a picture of my circuit. This is a control circuit for a MEMS capacitor but the operation isn't hugely important. The issue I am having is in measuring the output voltage. I have modelled a scope probe as being a 10MΩ resistance to ground. The problem is the output resistance of my circuit is quite high so 10MΩ is not enough and the current is just all sinking through this rather than going to my load capacitor CL1. Can anyone recommend a way for me to accurately measure the output? One idea I had was to place an opamp buffer at the output but I'm hoping to get other suggestions too.
Thanks for your time
Rachel
Attachments
-
9.2 KB Views: 22