Chap 7 - chireux.fr

X
Y YfEΣ
A β
E=X−β Y
Y=A E

Σ
X E AY
β
Yf
Y=A X −A β Y
Y(1 + β A) = A X
Y X
Y=A
1 + A β X
E Yf
E=1
1 + A β X
Yf=A β
1 + A β X
Aβ
Gbo
Gbo ≡Yf
E=Aβ
Gbf Y
X
Gbf ≡Y
X=A 1 + A β
A β
Gbf =1
βlorsque A β 1
Gbf
β A
X Y
Gbf

X Y
[Gbf ] = [V/V ] [β] = [V/V ]
X Y
[Gbf ] = [A/A] [β] = [A/A]
X Y
[Gbf ] = [A/V ] [β] = [V/A]
X Y
[Gbf ] = [V/A] [β] = [A/V ]
Y=A
1 + A β X→1 β=U2 U1
Aβ 1
Aao
U2= +Aao Uin
Uin =U1−Uf=U1−U2
R1
R1+R2
U2= +Aao U1−U2
R1
R1+R2
U2
U2=Aao
1 + Aao R1
R1+R2
U1
U2=R1+R2
R1
U1Aao → ∞

U2
U1
Uin
R2
R1
Uf
Y=A
1 + A β X
X=U1
Y=U2
A Aao
A=Aao
β
R1R2
β=R1
R1+R2
Aao → ∞
1
β= 1 + R2 R1
=U2
U1
U2=−Aao Uin
Uin =U1
R2
R1+R2
+U2
R1
R1+R2

U2
U1
Uin
R2
R1
U2=−Aao U1
R2
R1+R2
+U2
R1
R1+R2
U2
U2=−Aao R2
R1+R2
1 + Aao R1
R1+R2
U1
U2=−Aao R2
R1+R2
1 + Aao R2
R1+R2
R1
R2
U1
U2=−R2
R1
U1Aao → ∞
Y=A
1 + A β X
A Aao
R1R2
A=Aao
R2
R1+R2
β=R1
R2