MC3301, LM2900, LM3900
Figure 28. Voltage Regulator
1N3824
or equiv
V
Z
4.3 V
V
= V +0.6 Vdc
Z
O
V
CC
NOTES: 1. R is used to bias the zener.
2. If the zener TC is positive, and equal in
magnitude to the negative TC of the input
to the operational amplifier (≈2.0 mV/°C),
the output is zero–TC. A 7.0 V zener will
give approximately zero–TC.
1.0 Ω/16 W
–
0.1 µF
100
+
V
O
MJE800
or equiv
10
R
5.0 V at 4.0 A
Figure 29. Zero Crossing Detector
V
CC
= +15 V
1.0 M
510 k
1.0 M
510 k
Input
0 V
0 V
–
Output
Magnetic
Pickup
Output
510 k
510 k
+
2–122
MOTOROLA ANALOG IC DEVICE DATA