本设计采用基于AVR内核的MEGA8单片机，该单片机集成了相当丰富的片上资源，其中就包含有三路独立的PWM输出，在8MHz的晶振频率下，最高可以输出31.25KHz的8位分辨率脉宽，设计中主要是利用MEGA8的PWM输出功能来完成三路PWM波形的输出，其中两路是同步反向输出，频率、脉宽均可调，另外一路单独输出，脉宽可调。-This design based on AVR core MEGA8 microcontroller, which integrates a rich on-chip resources, which will contain a three-way independent PWM output, in the 8MHz crystal frequency, the maximum can output 8-bit resolution, pulse width 31.25KHz , the design is mainly used MEGA8 the PWM output function to complete the three-way PWM waveform output, two of which roads are synchronized reverse output, frequency, pulse width can be adjusted, another way a separate output, pulse width adjustable.