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crutschow, Good find. I checked the page out and unfortunatly I could not look at data sheets for some reason the links were all dead. I am curious to see what the output looks like over my frequency range.
You are correct this is electrophysiology, though it is cellular elecrophysiology and...
I am glad to see that our calculations agree thanks for the double check. That is the issue so I am not sure what option are out there that might get me close to being able to doing that. Maybe a high output voltage op amp that may get me closer? I have not found one yet though I am looking...
Hey All,
So I am trying to measure some impedance though for the measurement a micropippette is used and that adds 10-30Mohs of resistance to the circuit. Obviously this is a bit tough to try and drive current through. Currently using a howland source I can drive a couple uA through a 1M...
Now that I had that great help with figuring out how to use spice I am now hard at it. I am trying to drive at least 2uA of current through a 1Mohm resistor with some capacitance at frequencys of 100hz to 50khz. From what I have read a howland circuit is a possibility though from some testing I...
I am working on trying to make some impedance measurements and have been reading through a bunch of research papers and everyone seems to be using a Voltage Controlled Current Source(VCCS) for their measurements. What I can figure out exactly is why they are doing that as compared to a Voltage...
Major thanks to you, that seems to have solve the problem and made me realize what a idiot I am. I had looked at that though it appeared the power source was right because I had - to - and + to +, I completely overlooked that double negative.
just tried solver 0, and it again failed. One thing I notice is that it says the device X_U1.D14 failed to converge which seems to always be the problem. Is there maybe something wrong with the AD620 model?? I cant figure this out.
So I am trying to model a AD620 inamp from anolog devices and have their Lib with the AD620 in it and am trying to use that with a basic circuit. I am new to Capture CIS pspice and cannot seem to get the circuit to work without the convergence failing. I thought it might be a floating ref point...
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