carpenter
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I have constant current source with sense resistor, precision amplifier and N JFET transistor.
With 2N4392 my current source work from 1000pA. I need to improve the lower limit at least an order of magnitude to 100pA.
What transistor should I use?
With 2N4392 my current source work from 1000pA. I need to improve the lower limit at least an order of magnitude to 100pA.
What transistor should I use?