Author Topic: SMUs and capacitive loads  (Read 1104 times)

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Offline jeremy

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SMUs and capacitive loads
« on: June 30, 2018, 12:32:37 pm »

I'm using an Agilent SMU (U2723A) with a 10nF maximum load capacitance. However, I'm not interested in using the pulsed mode, nor the stepped mode. DC only, and if it takes a whole minute to settle, that's fine ;)

I'd like to characterise some devices which have a larger capacitance than this (up to 1uF). Is there some trick to improve the stability of the SMU so it can be used beyond this limit? Some of the newer units have "advanced algorithms" to work with this according to the datasheets, but I'm assuming they just slow down the feedback loop a lot.

Offline nctnico

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Re: SMUs and capacitive loads
« Reply #1 on: June 30, 2018, 08:54:19 pm »
Adding series resistance should do it.
There are small lies, big lies and then there is what is on the screen of your oscilloscope.

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