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Low current(voltage) source and low current measure setup

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blue_moon

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Hello!

Does anybody have any idea about how to generate currents (voltages) in the 0-500nA (0-500nV) range?. And any idea how to measure a current so small?

Thanks!
 

IanP

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Re: Low current(voltage) source and low current measure setu

First of all, to generate small currents (nA) you can produce accurate low voltage, say, mV or less, and then with high-precison high-ohm resistors in series convert this low voltage to low current ..

To measure low currents you can build a meter based on a precision opamp, such as, for example, the LM11, or similar, see picture below ..
For additional details on this circuit have a look at: https://www.national.com/an/AN/AN-242.pdf

Regards,
IanP
 

    blue_moon

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