MC33171 MC33172 MC33174
Figure 9. AC Coupled Noninverting Amplifier
with Single +5.0 V Supply
2.2 k
Cin
Vin
510 k
100 k
VCC
VO 0
+
CO
VO
–
100 k
RL 100 k
1.0 k
3.6 Vpp
AV = 101
BW ( –3.0 dB) = 20 kHz
Figure 10. AC Coupled Inverting Amplifier
with Single +5.0 V Supply
VCC
100 k
VO 0
3.8 Vpp
100 k
+
10 k
–
CO
VO
Cin
10 k
RL 100 k
Vin
AV = 10
BW ( –3.0 dB) = 200 kHz
Figure 11. DC Coupled Inverting Amplifier
Maximum Output Swing with Single
+5.0 V Supply
4.7 k
100 k
100 k
+
–
1.0 M
VCC
50 k
RL
VO
Vin VO 2.5 V
AV = 10
BW ( –3.0 dB) = 200 kHz
4.2 Vpp
Figure 12. Offset Nulling Circuit
VCC
3+ 7 6
2–
5
1
4
10 k
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
16 k
Vin
R
+
R
VO
0.01 C
2C
2R
2C
0.02
32 k
0.02
fo = 1.0 kHz
1
fo = 4 π RC
Figure 14. Active Bandpass Filter
C
R3
R1
0.047 2.2 k
1.1 k
Vin
–
C
R2 0.047
+
5.6 k
VCC
fo = 30 kHz
Q = 10
HO = 1.0
VO
0.4
VCC Then: R1 = R3
2 HO
R2 =
R1 R3
4Q2R1 –R3
Given fo = center frequency
Ao = Gain at center frequency
Q
R3 = π foC
Qo fo < 0.1
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