Sliding-Mode Quantized Control of a Class-D Audio Power Amplifier

• Main Authors: Yung-Huei Tsai, 蔡永輝
• Other Authors: Shiang-Hwua Yu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/6d9xh7

碩士 === 國立中山大學 === 電機工程學系研究所 === 96 === This thesis focuses on the design and implementation of a three-level Class D audio amplifier by applying recently developed sliding-mode quantized control. The designed controller, which consists of the analog filters and logic circuit, switches an H-bridge Class-D amplifier with a lowpass LC filter and operates it in the sliding mode, in order to achieve desired stability and high fidelity in the audio band. The experimental result shows that the lowest THD+N (total harmonic distortion plus noise) can be as low as 0.02% at 1 kHz. The performance is better than most of the available commercial products.