22-COMM-E

22-COMM-E

22-COMM-E

22-COMM-E

1.载波频率：也称为PWM信号的工作频率，通常是固定的，一般选择几千赫兹至几十千赫兹的频率，以保证足够高的调制精度和低的失真。

2.调制波形：这是用于控制PWM信号占空比的调制信号，可以是模拟信号或数字信号。 在数字控制系统中，调制波形通常是一个由微处理器或FPGA生成的数字信号。

3.占空比：占空比是指PWM信号中高电平时间与一个周期时间之比。 在实际应用中，占空比通常是由调制波形的幅值来控制的。 例如，当调制波形的幅值为0时，PWM信号输出为低电平; 当调制波形的幅值为大值时，PWM信号输出为大的高电平。

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