The Output Researching of a Cascaded Multilevel Class-D Power Amplifier

Abstract:

A high efficiency switch-mode power amplifier based on a cascaded multicell multilevel circuit topology is introduced in the paper. A multicell topology being operated in a unipolar phase-shifted PWM control to switch-mode amplifier system is introduced. After analysising a single-phase H-bridge unipolar PWM inverter’s output, the paper emphasis on the researching of the output of a Cascaded Multilevel Class-D Power Amplifier. The paper analyzes the advanced characteristic of the cascaded multilevel technique. Then a cascaded multilevel class-D power amplifier is built in the laboratory. The result of measurement shows a good following performance and stability.

• Periodical: Advanced Materials Research (Volumes 482-484)
• Pages: 3-10
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.482-484.3
• Online since: February 2012
• Authors: Guo Hua Xu, Ying Zhang, Ming Dong, Qing De Meng
• Keywords: Class D Amplifier, Harmonic, Multi-Level, Phase-Shifted Modulation

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