anumerique.py

Created by klfraimbow

Created on May 15, 2023

850 Bytes

MERCREDI


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

Anti-repliment 
place devant echantilloneurbloqueur
elimine les signaux d entree ne 
respecte pas shannon 
fe min = 2*Fmax
Shannon Fe >/ 2Fsignal

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

Fe=1/Te
fo Fe-fo fe fe+fo 
Fa=fe-f

filtre passe bas 
Fsignal </ fc </ Fe/2
K=Av  Av=Vs/Ve
G=logK=0 
-20db/decade

AOP
CR negative : lineaire 
i+=i-=0 et V+=V-

non inverseur si Ve pate + 
Vs=(1+ R2/R1)Ve  Av>1

inverseur si Ve pate - 
Vs=(-R2/R1)Ve    Av<1

suiveur si y'a rien juste CR
Vs=Ve -> adapte impedance

soustracteur Ve different 
Vs=Ve2-Ve1 

additioneursoustarcteur Ve meme borne
Vs=-(Ve1+Ve2)


CR positive/aucune : saturation 
V+>V- = Vsat +
V+<V- = Vsat -
  

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