October 2013
Intermediate to advanced
312 pages
12h 10m
English
Content preview from The Maplin Electronic Circuits Handbook, 2nd Edition
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168 TIMERS
t
Voltage
0 output (pin 3)
Time -
Figure
7.21
Relationship
between the two outputs provided
by the ZN1034
Voltage
r
Q output (pin-2)
Time-
TS
1 μ'
Figure
7.22 Using the ZN1034's
internal regulator
+ v
B
1N4001
1K
ι
1 k
=
0
RLj
(> 110Ω)
TRj
2N3053
The ZN1034 may also be configured for operation from supplies other
than a nominal + 5 V. This is achieved by means of an internal shunt
regulator (pin-5). A series resistor must then be inserted in the supply, as
shown in Figure 7.22. The value of the series resistor is given by:
V
—
5
R
s
= ^-ikQ
/
L
+ 7
Where V
s
is the supply rail voltage and I
L
is the load current in mA.
If desired, and a ...
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