Younger brother have a precision current source, I want to change the scope of its power supply big points, encounter a problem, is the op-amp U4 and U8 negative power is pick up to 5 v,
I remove the negative power supply chip, the negative power grounding (would like to upgrade power is larger), question, negative power grounding, one plus load short circuit, PS: no modification before measurement on both ends of the op-amp output is output,

CodePudding user response:

Increase in external to add, the original circuit parameters do not change,

CodePudding user response:

Hello, because the original circuit voltage of the load is limited, is 3.3-5 v, 28 v, now need to load change ~ circuit should be changed