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: **broken link removed**
Regards,
IanP