throbscottle
Well-Known Member
I am thinking of using a summing op-amp to connect maybe 4 alternative current shunts to a single output, instead of using some kind of switches. Since each input will have a very low resistance source, will this affect the accuracy of whichever shunt is providing the signal? (Since as far as any input is concerned the other input resistors will effectively be creating a potential divider to ground) Lowest value shunt is 500μΩ, largest will probably be 0.5Ω.