MC33171 MC33172 MC33174
Figure 9. AC Coupled Noninverting Amplifier
with Single +5.0 V Supply
2.2 k
510 k
VCC
Cin
100 k
+
–
Vin
1.0 k
AV = 101
BW ( –3.0 dB) = 20 kHz
100 k
RL
VO 0
CO
VO
100 k
Cin
Vin
AV = 10
BW ( –3.0 dB) = 200 kHz
100 k
10 k
+
–
10 k
RL
100 k
CO
VO
3.6 Vpp
100 k
VO 0
3.8 Vpp
Figure 10. AC Coupled Inverting Amplifier
with Single +5.0 V Supply
VCC
Figure 11. DC Coupled Inverting Amplifier
Maximum Output Swing with Single
+5.0 V Supply
100 k
4.7 k
50 k
RL
VO
1.0 M
VCC
Figure 12. Offset Nulling Circuit
VCC
3
2
7
6
5
1
10 k
+
–
+
–
4
100 k
V 2.5 V
Vin O
AV = 10
BW ( –3.0 dB) = 200 kHz
4.2 Vpp
VEE
Offset Nulling range is approximately
±80
mV with
a 10 k potentiometer, MC33171 only.
Figure 13. Active High–Q Notch Filter
Vin
≥
0.2 Vdc
16 k
Vin
R
0.01
C
16 k
R
–
+
VO
Vin
Figure 14. Active Bandpass Filter
VCC
fo = 30 kHz
Q = 10
HO = 1.0
VO
R1
1.1 k
C
0.047
R3
2.2 k
–
R2
5.6 k
2C
0.02
2R
32 k
2C
0.02
fo = 1.0 kHz
1
fo =
4
π
RC
C
0.047
0.4
VCC
+
Then: R1 =
R3
2 HO
R2 =
R1 R3
4Q2R1 –R3
Qo fo
Q
Given fo = center frequency
R3 =
< 0.1
Ao = Gain at center frequency
π
foC
GBW
Choose Value fo, Q, Ao, C
For less than 10% error for operational amplifier, where fo and GBW are expressed in Hz.
MOTOROLA ANALOG IC DEVICE DATA
7
ONSEMI [ ON SEMICONDUCTOR ]
