Analysis and design of a digital class d amplifier

• Main Author: Goh, Teck Lun.
• Other Authors: Tan Meng Tong
• Format: Final Year Project
• Language: English
• Published: 2009
• Subjects: DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits
• Online Access: http://hdl.handle.net/10356/17311
• Institution: Nanyang Technological University

This report documents the achievements for the final year project. A detailed analysis of the existing algorithms reveals that while the Lagrange Interpolation algorithm provides the best Total Harmonic Distortion (THD) performance and the Delta Compensation algorithm exhibits the worst THD performance; the Lagrange Interpolation algorithm needs the most complex hardware, whereas the Delta Compensation demands for a relatively simple hardware. After the analysis of the existing algorithms, three new algorithms that made use of the Taylor Series Expansion were proposed. By eliminating the use of division operations, the new algorithms can be implemented with a simpler hardware configuration. This was done while ensuring that THD is not compromised, as shown in Section 3.3 Total Harmonic Distortion.All the designs, including the three new algorithms were implemented on Altera Quartus II. Simulation results and further testing reveals that these designs worked as expected. A new algorithm that promises a higher power efficiency, and smaller circuit area design was developed.