6. Comparateurs et générateurs de signaux

VHVL
u1(t)
R1
U+=U−
U+=u1
R2
R1+R2
+u2
R1
R1+R2
=U−= 0
u1=−u2
R1
R2

R1R2
u1(t)
u2(t)
U2
U1
+Vsat
- Vsat
VT1 VT2
VT0
u1(t)
u2(t)±Vsat
u1(t)
u1(t) = 
VT1
VT2
=±Vsat
R1
R2
VT0= 0
∆VT≡VT1−VT2= 2 Vsat
R1
R2
u1(t)
U+U−
U+=u2
R1
R1+R2
=U−=u1
u1=u2
R1
R1+R2
u1(t)
u2(t)±Vsat
u1(t)
u1(t) = 
VT1
VT2
=±Vsat
R1
R1+R2
VT0= 0
∆VT≡VT1−VT2= 2 Vsat
R1
R1+R2

R1R2
u1(t) u2(t)
U2
U1
+Vsat
- Vsat
VT1 VT2
VT0
R1= 10 kΩR2={60 kΩ,20 kΩ,10 kΩ}Vsat =±12 V
R2
u1(t) = 10 Vsin(2πf0t)u2(t)f0= 50 Hz

Vref
Vsat =
VH
VL
u1(t)
R1Vref
R1R2
u1(t)
u2(t)
U2
U1
VH
VL
VT1 VT2
VT0
Vref
U+=U−
U+=u1
R2
R1+R2
+u2
R1
R1+R2
=U−=Vref
u1=Vref
R1+R2
R2−u2
R1
R2
u1(t)
u1(t) = 
VT1
VT2
=Vref
R1+R2
R2−
VL
VH
R1
R2
VT0=VT1+VT2
2