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LM358组成的恒流源问题

Other Parts Discussed in Thread: LM358, OPA188, REF200, INA128

利用LM358组成的恒流源在测试的过程中,发现电流会有小范围的变化,不知道知否为器件的温漂引起,是否有好的解决方法,谢谢!