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所述的直流PWM功率放大器，使用性能良好的功率器件IGBT及专用的驱动电路EXB840通过选配适当的电压、电流保护环节，为提高PWM功率放大器的性能创造了条件。同时由于精心设计了调制信号产生电路，并用可编程器件8253实现，使功率放大器输出信号的频率为功率管开关频率的两倍。一定程度上解决了既要输出信号频率高，又要开关损耗低的矛盾，并从根本上杜绝了同侧管直通的可能，省去了硬件延时保护环节。
The DC PWM power amplifier, the use of well-performance power devices IGBT and dedicated drive circuit EXB840 by matching the appropriate voltage and current protection links, in order to improve the performance of the PWM power amplifier to create the conditions. At the same time due to careful design of the modulation signal generation circuit, and with programmable device 8253 to achieve, the power amplifier output signal frequency of the power tube switching frequency twice. To some extent, it solves the contradiction between high output signal frequency and low switching loss, and fundamentally eliminates the possibility of straight-through of the same-side tube, eliminating the need for hardware delay protection.