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Principles of Analog Electronics
book

Principles of Analog Electronics

by Giovanni Saggio
January 2014
Intermediate to advanced content levelIntermediate to advanced
567 pages
23h 13m
English
CRC Press
Content preview from Principles of Analog Electronics
Principles of Analog Electronics
216
ANSWER
According to Thévenin’s theorem, the
previous bridge topology is equiva-
lent to a voltage source V
TH
in series
with a resistor R
TH
. We have to calculate
them (Figure 6.36).
V
TH
is the voltage “seen” at the output
“1-2” port, so we can determine it as the dif-
ference between the voltage at the node “1”
V
1
, and the one at the node “2” V
2
.
Considering the node connecting V
B
, R
2
,
and R
4
as a reference, we have
V
R
RR
V
B1
2
12
=
+
and
V
R
RR
V
B2
4
34
=
+
therefore
V
R
RR
R
RR
V
TH B
=
+
+
2
142
4
34
To determine the value of the resistor R
TH
, we need to nullify the effect of
the voltage source (a short-circuit across it) (Figure 6.37 ...
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Publisher Resources

ISBN: 9781466582026