Copy of Two-Op-Amp Instrumentation Amplifier

This is an instrumentation amplifier implemented using two operational amplifiers. The general relation between input and output voltages is: Vout = (V2-V1)[1+(R2/R1)+(2R2/RG)]+VREF Where R2/R1 = R5/R4 For the circuit shown the gain is (0-10mV)[1+(100/100)+(2x100/100)]+0 = -40mV