MC34071,2,4,A MC33071,2,4,A
(Typical Single Supply Applications V
CC
= 5.0 V)
Figure 37. AC Coupled Noninverting Amplifer
Figure 38. AC Coupled Inverting Amplifier
V
CC
5.1 M
V
O
3.7 V
pp
0
3.7 V
pp
0
V
CC
100 k
1.0 M
20 k
C
in
C
O
68 k
+
V
O
+
MC34071
C
in
MC34071
–
10 k
V
O
36.6 mV
pp
–
C
O
10 k
100 k
V
in
10 k
R
L
100 k
R
L
V 370 mV
in pp
1.0 k
A = 101
V
A = 10 BW (–3.0 dB) = 450 kHz
V
BW (–3.0 dB) = 45 kHz
Figure 39. DC Coupled Inverting Amplifer
Maximum Output Swing
Figure 40. Unity Gain Buffer TTL Driver
2.5 V
V
O
V
4.75 V
pp
0
0 to 10,000 pF
Cable
CC
2.63 V
+
V
in
MC54/74XX
MC34071
91 k
–
TTL Gate
5.1 k
R
L
5.1 k
100 k
+
MC34071
V
O
–
Figure 42. Active Bandpass Filter
1.0 M
A = 10
V
V
in
BW (–3.0 dB) = 450 kHz
C
0.047
R3
2.2 k
R1
–
V
in
MC34071
1.1 k
R2
5.6 k
Figure 41. Active High–Q Notch Filter
V
O
C
0.047
+
V
CC
f = 30 kHz
o
H = 10
H = 1.0
o
o
V ≥ 0.2 Vdc
in
0.4 V
R2 =
CC
V
–
O
MC34071
Given f = Center Frequency
o
R
R
+
A = Gain at Center Frequency
O
V
in
16 k
16 k
Choose Value f , Q, A , C
o
o
C
Then:
Q
R3
R1 R3
2
0.01
R3 =
R1 =
πf C
o
2H
4Q R1–R3
o
f = 1.0 kHz
o
Q f
o o
2.0 R
32 k
< 0.1
For less than 10% error from operational amplifier
GBW
1
f =
o
4πRC
where f and GBW are expressed in Hz.
o
GBW = 4.5 MHz Typ.
2.0 C
0.02
2.0 C
0.02
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