BU Research Blog

We would like to invite you to the next research seminar of the Creative Technology Research Centre.

Speaker: Nasir

Title: Development of novel low noise Switch-mode power supply designs for high fidelity audio power amplifiers

Time: 2:00PM-3:00PM

Date: Wednesday 25 February 2015

Room: P335, Poole House, Talbot Campus

Abstract:

Nowadays, linear power supplies are widely used to provide the supply voltage rail to an audio amplifier and are considered bulky, inefficient and expensive due to the presence of various components. In particular, the typical requirements of linear designs call for physically large mains transformers, energy storage/filtering inductors and capacitors. This imposes a practical limit to the reduction of size and weight in audio power systems. In order to overcome these problems, Switch-mode Power Supplies (SMPS) incorporate high speed switching transistors that allow for much smaller power conversion and energy storage components to be employed. In addition the low power dissipation of the transistors in the saturated and off states results in higher efficiency, improved voltage regulation and excellent power factor ratings. However, the use of SMPS in audio amplification is not novel in itself, the contribution will arise from design optimisation to achieve the lowest possible harmonic distortion in the audio output stage. Therefore, the primary aim of this research project is to develop the novel low noise switch mode power supply for an audio power amplifier. It will also strive to elevate the reliability of SMPS through stability analysis and enhance the efficiency of power supply through high speed switching transistors. As a result, the research will aim towards changing the way industrial manufacturing of power supplies for audio amplifiers are carried out. It will also provide a new path for researchers in this field to utilize the SMPS in all other audio devices by further enhancing its efficiency and reducing system noise.

We hope to see you there.