0 个投票

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.

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回答（1 个）

Ameer Hamza
Ameer Hamza 2020-6-18
编辑：Ameer Hamza 2020-6-18

0 个投票

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');

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Thank you Ameer. I have a question. How to change the amplitude range value between 0 and 5?
Ameer Hamza
Ameer Hamza 2020-6-18
Change the line to
y = A*(square(2*pi*f*t)+1)/2;
It works. Thank you Ameer
Ameer Hamza
Ameer Hamza 2020-6-18
I am glad to be of help!!!

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