acan.py

Created by klfraimbow

Created on May 15, 2023

957 Bytes


CAN 
Nsmax=2**n -1
  PE=Vemax-Vemin
q=PE/2**n 

Shannon : fe >/ 2Fsignal
fe min = 2*Fmax

Fe=1/Te
fo Fe-fo fe fe+fo 
Fa=fe-f
G=logK=0 
-20db/decade
contre reaction negative
montage suiveur (sortie sur -)
-> adapte impedance
contre reaction sortie sur pate +
inverseur si Ve sur - AOP
1 seuil : ali boucle ouv
sortie pas connecte 
Amplificateur lineaire Integre
2 seuils : ali a reaction 
sortie relie entre non inverseuse
AOP lineaire
V+ = V- avec ud = V+ - V-
i+ = i- = 0
Te >/ Tc 

Filtre antirepliment :
elimine les signaux entrees qui ne
respecte pas condition shannon

Fsignal < fc < Fe/2 

Echantiolloneur bloqueur : 
Prelever periodiquement a la 
Fe un echnatillon de tension 
Ensuite garder constante pendant la
duree de la conversion analogique
numerique 

multiplexeur 
permet de traiter plusieurs signaux
entree par une seule voie d acquisition
permet aiguiller (reduire nb cable)

unipolaire Ve=0V
Ns=Ve/q 

bipolaire
Ns=Ve-Vemin/q
 

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