4) The difference amplifier as shown in Fig. (8) was built using R1 = R3 = 1 kOhms, R2 = R4 = 2 kOhms, V1 = -3.00 V, and V2 = 2.00 V. The theoretical Vout was calculated using the following relationship,
- \(V_{out}\ =\ \frac{R_2}{R_1}\left(V_2-V_1\right)\ =\ -10\ V\)
and the voltage measured came to,
- \(V_{out}\ =\ -10.11\ V\)
verifying that the circuit works as to be expected.