Chapter 3, Problem 3.9QAP

Interpretation Introduction

(a)

Interpretation:

The design of an inverting amplifier with gain of $40$ such that the input resistance $R_{\text{i}}$ is $50\text{kΩ}$ is to be stated.

Concept introduction:

An inverting amplifier is a type of operational amplifier in which the output of the amplifier is given to the inverted terminal as an input through the feedback resistor. In inverting amplifier, the phase difference between the input and the output voltage is $180°$.

The gain in the inverting amplifier is defined as $A=\frac{R_{\text{f}}}{R_{\text{i}}}$, where $R_{\text{f}}$ is the feedback resistance and $R_{\text{i}}$ is the input resistance.

Interpretation Introduction

(b)

Interpretation:

The range of the usable input voltage of inverting amplifier of part (a) is to be stated.

Concept introduction:

An inverting amplifier is a type of operational amplifier in which the output of the amplifier is given to the inverted terminal as an input through the feedback resistor. In inverting amplifier, the phase difference between the input and the output voltage is equal to $180°$.

The output voltage of the inverting amplifier is defined as $v_{\text{o}}=A{v}_{\text{i}}$, where $v_{\text{i}}$ is the input voltage and $A$ is the gain in the inverting amplifier.

Interpretation Introduction

(c)

Interpretation:

The input resistance to the inverting amplifier of part (a) is to be stated.

Concept introduction:

Inverting amplifier is the type of operational amplifier in which the output of the amplifier is given to the inverted terminal as an input through the feedback resistor. In inverting amplifier the phase difference between the input and the output voltage is equal to $180°$.

The gain in the inverting amplifier is defined as $A=\frac{R_{\text{f}}}{R_{\text{i}}}$, where $R_{\text{f}}$ is the feedback resistance and $R_{\text{i}}$ is the input resistance.

Interpretation Introduction

(d)

Interpretation:

The ways to avoid the loading error if the voltage source were loaded by an input resistance as a result in the part (c).

Concept introduction:

Inverting amplifier is the type of operational amplifier in which the output of the amplifier is given to the inverted terminal as an input through the feedback resister. In inverting amplifier the phase difference between the input and the output voltage is $180°$.