Linearization of Audio Power Amplifiers with Feedback Mechanism

In this project, we explored the design and testing of audio power amplifiers, focusing on the balance between efficiency and linearity, crucial for high-fidelity sound systems. We began by simulating both Class-A and Class-B output stages, using CMOS power transistors, and analyzing their performance characteristics, including power consumption and output spectra.

Following simulations, we built both output stages, incorporating a differential pair and employing feedback to enhance linearity in the Class-B amplifier. The practical setup involved testing with an 8-Ω speaker and a sound waveform input, allowing us to observe the real-world sound quality and validate our design against theoretical expectations.