Question 5. For the op amp circuit shown in Fig. 3, write the general formula for the voltage gain Av

with units of volts-per-volt (V/V), and expressed in terms of resistors R1 and R2.

41

Answer 5. (5 points) Av=

Vin

m

R1

mun

R2

Vout

Fig. 3. Closed loop feedback amplifier circuit.