MC3301, LM2900, LM3900
B. Noninverting Amplifier
(R )(A )
f
i
A =
These devices may be used in the noninverting mode
(see Figure 13). The amplifier gain in this configuration is
subject to the current mirror gain. In addition, the
resistance of the input diode must be included in the
value of the input resistor. This resistance is
v
26
R +
i
I
in
+(mA)
The bandwidth of the noninverting configuration for a
given R value is essentially independent of the gain
chosen. For R = 510 kΩ the bandwidth will be in excess
of 200 kHz for noninverting of 1, 10, or 100. This is a
result of the loop gain remaining constant for these gains
since the the input resistor is effectively isolated from the
feedback loop.
f
26
f
approximately
Ω, where I +is input current in
in
I
+
in
milliamperes. The noninverting AC gain expression is
given by:
Figure 16. Tachometer Circuit
V
= +12 V
130
CC
Magnetic Pickup
Hysteresis Amplifier
Monostable Multivibrator
R1
Pulse Averaging
C1
0.1 µF
100 k
MSD6100
or equiv
6.1 V
100 k
100 k
R2
10 k
R1
1.0 M
Magnetic
Pickup
Power
Supply
(nonregulated)
–
–
–
4.7 k
Amp 1
+
–
Amp 4
+
Output
Amp 2
+
V
O
C1
0.01 µF
Amp 3
+
R1
1.0 M
500 k
0.01 µF
MSD6100
or equiv
R
Y
10 k
Hysteresis Voltage for Switching
Timing Interval: t 0.7 R1 C1
(V –0.6)
O
A t
i
V
pp
A R2
i
R C1
Y
V =
(V – 1.6)
CC
H
R1
Figure 17. Voltage Regulator
Figure 18. Logic ‘‘OR’’ Gate
V
CC
150 k
Z1
–
V
CC
= +15 Vdc
R2
f
75 k
75 k
75 k
+
A
B
C
–
Q1
+
f = A + B + C
R1
V
O
R2
R1
V
= V +0.6 (1 +
Z1
) – V
BE
O
Q1
Note:
For positive T zeners R2 and R1 can be
C
selected to give T output.
C
2–119
MOTOROLA ANALOG IC DEVICE DATA
ONSEMI [ ONSEMI ]
