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Using Matlab with Series RLC

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jona1han

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I'm just trying to review some concepts of RLC series circuits. Nothing too intense.
The idea with the Matlab code below is to generate a plot of input impedance with respect to the normalized frequency. I am expecting a nice even dip when the frequency matches the resonant frequency. However, I get a very smooth curve. Can anybody tell me why?

Code: 
clear all, close all, clc
R=100;  %Resistance
C=6*10^(-6);  %Capacitance
L=.1;  %Inductance
w_0=1/sqrt(C*L);  %Resonant Frequency

n=1;
for w=100:1:2*w_0
    Z(n)=abs(j*w*L+(1/(j*w*C))+R);  %Input impedance as a function of frequency
    ww_0(n)=w/w_0;  %Normalized Frequency
    n=n+1;
end

plot(ww_0,Z)
 

Hi;
I think this will help you (you should inrease the range of w and plot in logarithmic domain);
Code: 
clear all, close all, clc
R=100;  %Resistance
C=6*10^(-6);  %Capacitance
L=.1;  %Inductance
w_0=1/sqrt(C*L);  %Resonant Frequency

w=0.1*w_0:2:10*w_0;
Z=abs(j*w*L+(1./(j*w*C))+R);  %Input impedance as a function of frequency
loglog(w/w_0,Z)
% semilogx(w/w_0,Z) %See also result in w axis in log domain

Hope helps
PS:I modified it a little bit, for better run time.
 
That was exactly what I was looking for! I did not know about the loglog function, thanks.
 

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