jonnybgood
Full Member level 4
Dear Jonny
The differential amp can use to obtain the difference between the voltage across the resistor and it can amplify you current error signal . but at that circuit because of that , the current sensor ( resistor ) is under the load to ground , i think it is not necessary to use diff amp , here .
All the best
Goldsmith
I was a littile bit scepticle of the differential amplifier because, I said that there will always be voltage across the current sense resistor except at no load. This will always create a positive output voltage irrelevant on the set closed loop gain and therefore I thought that this method can never be precise.. I am I right?