信号完整性中信号上升时间与带宽研究
本文的仿真代码很简单，我把代码贴在这里，你可以自己在matlab上运行一下看看。
clc; clear all; pack;
Fs = 10e9;
Nsamp = 2e4;
t = [0:Nsamp-1].*(1/Fs);
f1 = 1e6;
x0 = 3.3/2;
x1 = x0 + 1.65*sin(2*pi*f1*t);
x3 = x0;
for n=1:2:3
x3 = x3 + 3.3*2/(pi*n) * sin(2*pi*n*f1*t);
end
x5 = x0;
for n=1:2:5
x5 = x5 + 3.3*2/(pi*n) * sin(2*pi*n*f1*t);
end
x7 = x0;
for n=1:2:7
x7 = x7 + 3.3*2/(pi*n) * sin(2*pi*n*f1*t);
end
figure
subplot(221)
plot(x1)
subplot(222)
plot(x3)
subplot(223)
plot(x5)
subplot(224)
plot(x7)
x217 = x0;
for n=1:2:217
x217 = x217 + 3.3*2/(pi*n) * sin(2*pi*n*f1*t);
end
figure
plot(x217)
figure
plot(x217,'k')
hold on
plot(x1,'b')
plot(x3,'g')
plot(x7,'r')
hold off
axis([8000 12000 -0.5 4])
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