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58 lines
1.2 KiB
Python
58 lines
1.2 KiB
Python
6 years ago
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# -*-coding:Latin-1 -*
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from math import *
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print("Entrez la fréquence de coupure:")
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frequence = input()
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#print(f)
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print("Entrez l'impédance d'entrée:")
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impedance=input()
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print("Entrez l'amplitude max:")
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amplitude=input()
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print("Entrez l'ordre du filtre:")
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ordre=input()
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#Calcul des paramètres
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#Calcule de wc
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wc=2*pi*frequence
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#Calcul de b
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b=log(cosh(amplitude/17.37)/sinh(amplitude/17.37))
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#Calcul de gamma
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gamma=sinh(b/(2*ordre))
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#initialisation i
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i=1
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ak=[0]*ordre
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bk=[0]*ordre
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gk=[0]*ordre
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#Cacule de ak
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for i in range(ordre):
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ak[i-1]=sin((2*(i-1)*pi)/(2*ordre))
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#Calcul de bk
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for i in range(ordre):
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bk[i-1]=pow(gamma,2)+(sin(i*pi)/ordre)
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print("test")
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print(bk)
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#Calcul de gk
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gk[0] = ((2*ak[1])/gamma)
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print(ak)
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print(gk[0])
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print(bk[0])
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for i in range(ordre):
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gk[i]=((4*ak[i-1]*ak[i])/(bk[i-1]*gk[i-1]))
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#Calcul de ck et lk
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if (ordre%2)==0:
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for i in range(ordre):
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lk[i]=(impedance/wc)*gk[i]
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for i in range(ordre):
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ck[i]=(1/impedance)*(1/wc)*gk[i-1]
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else:
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for i in range(ordre):
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lk[i]=(impedance/wc)*gk[i-1]
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for i in range(ordre):
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ck[i]=(1/impedance)*(1/wc)*gk[i]
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#Calcul de Rn
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if ordre==1:
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rn=1*impedance
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else:
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rn=pow((tanh(b/4)),2)
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print(ck)
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