Plot a PWM Signal

Hello my name is Fattah, i am new in Matlab.

Can anybody here do me a favor? I want to plot a PWM Signal that have frequency = 490 Hz, Amplitude = 0 - 5, and Duty Cycle 50%. I've already try this : https://www.mathworks.com/help/signal/ref/square.html, but i have no idea how to set the frequency and the amplitude.

Thank you.

Answer 1

[Ameer Hamza]

Try this

f = 490;
A = 5;
t = linspace(0, 0.01, 10000);
y = A*square(2*pi*f*t);
plot(t, y)
xlabel('time');
ylabel('Amplitude');

[Muhammad Fattah Al Fattika]

Thank you Ameer. I have a question. How to change the amplitude range value between 0 and 5?

[Ameer Hamza]

Change the line to

y = A*(square(2*pi*f*t)+1)/2;

[Muhammad Fattah Al Fattika]

It works. Thank you Ameer

[Ameer Hamza]

I am glad to be of help!!!