January 2016
Beginner
230 pages
7h 53m
English
Content preview from Starting Electronics
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Integrated circuits
9V BATTERY
9V BATTERY
-ev
Figure
9.11 An
experimental circuit
to
demonstrate
the
process
of
offset nulling
negative
supply. Adjusting the wiper controls the offset
voltage.
You'll
see that the circuit is basically a buffer
amplifier,
like that of Figure 9.9, in which the
input
volt-
age
to the non-inverting terminal is 0 V.
Figure
9.12 shows the breadboard layout of this offset
nulling circuit. The multi-meter should be set to its low-
est
voltage setting e.g., 0.1 V, and even at this setting
you won't notice much difference in the
output
voltage.
In
fact,
you probably won't be able to detect any more
than a change of abou ...
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