一种新型串联电感并联调谐DE^(-1)类功率放大器

A new series-L/parallel-tuned class DE^(-1) power amplifier

提出了一种新型串联电感并联调谐DE^(-1)类功率放大器,利用零电流转换(ZCS)和零电流斜率转换(ZCSS)条件对电路进行理论分析。推导出了理想条件下该功率放大器的各元件参数的计算表达式。计算分析了该放大器的性能。DE^(-1)类功率放大器理论上具有100%的效率,既具有D类功率放大器的优点,又具有E^(-1)类放大器的优点。设计了实验电路对理论分析进行验证。采用3V电源,在110 kHz频率下,该功率放大器的效率达到了97.8%,且实验波形与理论分析一致。

This paper proposes a new series-L/parallel-tuned class DE^-1 power amplifier. The theoretical analysis was conducted according to zero current switching（ZCS） and zero current slope switching（ ZCSS） conditions. The closed form design equations under ideal switching conditions were given. The performance of the power amplifier was calculated. Theoretically, class DE^-1 power amplifier has efficiency of 100 %. It has both of the advantage of class D and class E^-1. Circuit implementation was carried out to verify the proposed amplifier. In the experiment, the supply voltage is 3 V, and the optimal working frequency is 110 kHz, and the power amplifier achieves efficiency of 97.8 %. Good agreement between theory and experiment results is achieved.