The precise nA stage current generator

Published:2011/6/26 20:55:00 Author:Borg | Keyword: precise, nA stage, current generator | From:SeekIC

In real application, some special test circuits need the nA stage precise current as the reference, which is hard to make in the non-professional condition. In the figure is the precise nA stage current generator. This circuit is a constant micro current source. To make the current to be changed continuously and casually, as it is fixed with the multi-turn(10 turns) potentiometer as the divider to divide the reference voltage, so the value can be read out directly. Then by the current gear changing resistors of R3 and R4, the micro current of wide range is generated.



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