PWM is the abbreviation of Pulse Width Modulation in English. It is a way of adjusting the output value and waveform by changing the pulse width of the pulse train according to a certain rule. PAM is the abbreviation of Pulse Amplitude Modulation (Pulse Amplitude Modulation) in English. It is a modulation method that changes the pulse amplitude of the pulse train according to a certain rule to adjust the output value and waveform.
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