Electronique : amplificateurs opérationnels (PCSI)

R2
Us
+Vsat Ue
Us
−Vsat Ue
UsUe

Us2+Vsat Us1
0
Us1Ue1Us2Ue2
Us(t)
R
VsV1V2
R1=R2=R3= 50Ω 1 V1=U0cos (ωt)
2V2=U0cos ((ω+ 2δω)t+ϕ)δω ω
R
C δω−1RC ω−1
δω
v
ω ω0=ω1−2v
cω c
f'30 GHz
1ω0
f0'3kHz

uBuSH=uS
ue
H=H0
1+jQω
ω0
−ω0
ω
R= 6.8 kΩ R= 47 Ω C= 680 nF
e(t)E= 10 V f=ω
2π=
1650 Hz
e(t) = E
+∞
P
p=0
a2p+1 sin ((2p+ 1) ωt)a2p+1 =4
(2p+1)π
ω→+∞
VF=VDVD−VF=rI VD= 0 VS
R+VD R= 0 VS= 0
ω→0VS=VA=V+
AO1= 0
D0 = VD
r+jCωVBVD=−VSVB=1 jrCω VS
A0 = VB
r+VE R+1 R+jCωVS=VE R+1 R+1 jr2Cω +jCωVSVS=−VE
1+jRCω+R
jr2Cω
H0=−1Q=r
R= 145 ω0=1 rC = 3.13 104s−1

s(t) = S
+∞
P
p=0
b2p+1 sin ((2p+ 1) ωt +φ2p+1)
∆ω=ω0
Q= 216 s−12ω
p(2p+ 1)ω=ω0→p= 1
3f b3=1
1+Q23ω
ω0
−ω0
3ω2φ3=