January 2016
Beginner
230 pages
7h 53m
English
Content preview from Starting Electronics
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Starting
electronics
Offset
nulling
Earlier
on it was mentioned that there are two connec-
tions to the 741 which are called offset null connections.
In
most op-amp applications these would not be used,
but in certain instances, where the level of the
output
voltage
is of critical importance they are.
When
the op-amp has no
input
voltage applied to it —
or,
more correctly speaking, the
input
voltage is 0 V —
the
output
voltage should be the same i.e., OV. Under
ideal conditions of manufacture this would be so, but as
the 741 is a mass-produced device there are inevitable
differences
in circuit operation and so the
output
is
rarely exactly 0
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