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Why I am getting negative values in my low pass filter results?

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Zahra
Zahra 2023-4-8
回答： Sam Chak 2023-4-11
Why I am getting negative values in my low pass filter ?

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Sam Chak
Sam Chak 2023-4-11
Ran in:
Hi @Zahra
Since you asked, I'm guessing the input values are negative.
t = linspace(0, 10, 1001);
lpf = tf(1, [1 1]) % Low-pass Filter
lpf = 1 ----- s + 1 Continuous-time transfer function.
u = ones(1, length(t));
lsim(lpf, -u, t), ylim([-1.2 0])

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