Chapter 5, Problem 1P

(a)

To determine

Label the five terminals in the operational amplifier.

Explanation of Solution

Given data:

Refer to Figure P5.1 in the textbook for the ideal op amp circuit.

Discussion:

The five terminals of the op amp are labeled as shown in Figure 1.

Conclusion:

Thus, the five op-amp terminals with their names are labeled as shown in Figure 1.

(b)

To determine

Mention the ideal op amp constraint that determines the value of $i_n$ and also mention the value of $i_n$.

Answer to Problem 1P

The input resistance of the op amp constraints determines the value of $i_n$ and the value of current $i_n$ is $0\text{A}$.

Explanation of Solution

Discussion:

The input resistance available at the input terminals will determines the current value $i_n$. The input resistance of an ideal op amp is infinite, which constraints the value of the input currents to zero. Hence, the value of current $i_n=0\text{A}$.

Conclusion:

Thus, the input resistance of the op amp constraints determines the value of $i_n$ and the value of  current $i_n$ is $0\text{A}$.

(c)

To determine

Mention the ideal op amp constraints that determines the value of $\left(v_p-v_n\right)$ and also mention the value of $\left(v_p-v_n\right)$.

Answer to Problem 1P

The open loop voltage gain of the op amp constraints the value of $\left(v_p-v_n\right)$ and the value of $\left(v_p-v_n\right)$ is $0\text{V}$.

Explanation of Solution

Discussion:

The open loop voltage gain of an ideal op amp determines the value of $\left(v_p-v_n\right)$. The open loop voltage gain of an ideal op amp is infinite, which constraints the difference between the voltage that appear across the inverting and non-inverting terminal of the op amp to 0 V. Therefore, the value of $v_p-v_n=0\text{V}$.

Conclusion:

Thus, the open loop voltage gain of the op amp constraints the value of $\left(v_p-v_n\right)$ and the value of $\left(v_p-v_n\right)$ is $0\text{V}$.

(d)

To determine

Find the value of voltage $v_o$ for the circuit shown in Figure P5.1 using PSPICE.

Answer to Problem 1P

The value of voltage $v_o$ in the given circuit is $-6\text{V}$.

Explanation of Solution

PSpice Simulation:

Draw the given circuit in PSPICE as shown in Figure 1.

Provide the simulation settings as shown in Figure 2 to obtain output parameters.

After simulating the PSPICE circuit, the output voltage $v_o$ is shown in Figure 3.

From Figure 3, the value of output voltage is $v_o=-6\text{V}$.

Conclusion:

Thus, the value of voltage $v_o$ in the given circuit is $-6\text{V}$.