Anybody got wisdom on using transistors at very low (like, picoamp) collector currents? What happens to beta?
I'm thinking of a common-base current source in this specific case. I need a controlled current source from low nA to low pA, low noise but not especially accurate... it would be inside a bigger loop. Driving a transistor common-base would work nicely in my situation.
I did some googling, but all the good stuff seems to be in non-public journals.