Research and Design of Class D Amplifier at 1 MHz

摘要

This paper is mainly for the study of current mode Class-D(CMCD) power amplifier at 1MHz operating frequency. The article mainly focuses on the influence of the driving circuit of the power MOSFET on the Class-D amplifier at high frequency, the parameter calculation in the power amplifier circuit and the parameters of the output transformer. The calculations are discussed in three aspects. In addition, the article discusses the Class-D materials used in the circuit. The article realizes the development of a current-type Class-D amplifier based on the efficiency value of nearly 80% at the operating frequency of 1MHz, and it builds a specific circuit for physical design and verification.