PWM-modulator-demo

A PWM modulator demo written in MATLAB uses the figure to demonstrate the PWM (Class D) modulation process of a sine wave.

I uploaded the MATLAB script file (.m) as well as the MATLAB live script file (.mlx), which you can open by clicking the button below:

In the program, there are five plots, namely:

• Figure of sine wave input

• Figure of sawtooth wave reference

• Figure that contains the input signal, reference sawtooth waveform and output PWM that shows the modulation process

• Figure of the output filter process

• Figure that compares the difference between the input signal and the filtered output signal

Ver. 1.2 Update: I redesign that program in live editor, it looks like this:

Now the following parameters can be changed by tweaking sliders:

• Frequency of the input sine wave
• period of the sine wave that is being displayed
• modulation multiplier

Have fun playing around!