This is a weak current measurement circuit, The first stage OP is AD 549LH, I have a doubt about this circuit，What is the effect of the resistor R3 and R5 in the circuit?
Resistors R3 and R5 set the gain of the OP07 in the circuit. It is configured in a gain of 40, i.e. (1 + R5/R3). What is your concern regarding the circuit?
Retrieving data ...