Overview

Discover the functionality of inverting and non-inverting amplifier circuits using operational amplifiers (op-amps). This tutorial provides a step-by-step guide to help you understand their key differences and practical applications in electronics.

Components Required

• Op-Amp (e.g., LM741)
• Resistors (10kΩ, 100kΩ)
• Power Supply
• Function Generator
• Oscilloscope
• Breadboard and connecting wires

Procedure

1. Connect the op-amp in an inverting amplifier configuration using feedback resistors. Ensure the input signal from the function generator is connected to the inverting input via a resistor.

2. Observe the output on the oscilloscope, noting the phase inversion of the signal.

3. Reconfigure the circuit as a non-inverting amplifier. Connect the input signal to the non-inverting input and set the gain using appropriate feedback resistors.

4. Measure the amplified output signal on the oscilloscope, verifying no phase inversion.

Expected Result

The inverting amplifier will produce an output signal that is 180° out of phase with the input, while the non-inverting amplifier will amplify the signal without phase inversion. The gain in both cases depends on the resistor values used.

Applications

These circuits are widely used in audio processing, signal conditioning, and other electronic systems requiring precise signal amplification.