MULTI-LEVEL SWITCHING 과 ZVS를 이용한 CLASS D AMPLIFIER

Abstract

This paper presents design of a class D Amplifier using multi-level switching and Zero-Voltage-Switching (ZVS) technique. The amplifier circuit features zero voltage switching at all switches of the circuit and multi-level switching operation so that the higher efficiency and lower THD could be achieved. A 50-W prototype D class amplifier built and tested it. As a result, the maximum efficiency of 96% and the THD of under 60% were obtained.