MC3303 - MC3403 - MC3503
APPLICATION INFORMATION
(continued)
HIGH IMPEDANCE DIFFERENTIAL
AMPLIFIER
e
1
1/4
MC3403
COMPARATOR WITH HYSTERESIS
1 R
C
R
R2
V
OH
Hysteresis
a R1
R1
1/4
MC3403
b R1
1 R
C
e
o
V
(ref)
R1
1/4
MC3403
V
I
V
O
V
O
V
OL
V
I H
V
I L
V
(ref)
1/4
MC3403
e
2
e
o
= C (1 + a + b) ( e
2
- e
1
)
R
R1
[ V
OL
−V
(re
f
)
]
+
V
(ref)
R1+ R2
R1
V
I H
=
[ V
OH
−V
(ref)
]
+
V
(ref)
R1+ R2
R1
H
=
[ V
OH
−
V
OL
]
R1+ R2
V
I L
=
BI-QUAD FILTER
V
(re
f
) =
R
R
1
V
CC
2
f
O
=
1
2Π RC
C
C1
e
I
C
100kΩ
R1 = QR
R2
=
R1
T
BP
R2
1/4
MC3403
R
R3 = T
N
R2
1/4
MC3403
100kΩ
C1 = 10C
1/4
MC3403
For :
V
(ref)
V
(ref)
Bandpass output
R3
R1
R2
R = 160k
Ω
C = 0.001
µ
F
R1 = 1.6M
Ω
R2 = 1.6M
Ω
R3 = 1.6M
Ω
1/4
MC3403
C1
Notch output
V
(ref)
f
O
= 1kHz
Q = 10
T
BP
= 1
T
N
= 1
Where T
BP
= Center frequency gain
V
(ref)
T
N
= Passband notch gain
6/11
STMICROELECTRONICS [ STMICROELECTRONICS ]
