Electronics Lab Assignment: 741 Op-Amp Inverting, Non-Inverting and Multistage Amplifier Calculation and Simulation

Electronics Lab Assignment: 741 Op-Amp Inverting, Non-Inverting and Multistage Circuits

In this Malaysian engineering lab, students analyse three op-amp amplifiers driven by a 1 Vpk, 10 kHz signal from ±12 V supplies, first by calculation and then through circuit simulation, and present both in the results section.

Op-Amp Basics (Figure 1)

The brief shows the 8-pin layout of a typical op amp (offset null, inverting and non-inverting inputs, V−, V+, output, no connection) and its circuit symbol.

Circuits to Analyse

1. Circuit 1 – Inverting amplifier (Figure 2): input resistor R1, 10 kΩ feedback resistor R2, oscilloscope on input and output.
2. Circuit 2 – Non-inverting amplifier (Figure 3): signal on the non-inverting input with 10 kΩ gain-setting resistors.
3. Circuit 3 – Multistage amplifier (Figure 4): cascaded 741 stages using resistors between 2 kΩ and 15 kΩ as drawn.

Tasks

• Task 1 – Calculation: apply a related circuit theorem to calculate the output voltage, show the working in the results section, and sketch the input and output waveforms.
• Task 2 – Simulation: simulate the circuits in suitable software and include the schematic, a screenshot of the output voltage measurement and the input/output waveforms.