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Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
book

Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition

by John G. Webster, Halit Eren
February 2014
Intermediate to advanced content levelIntermediate to advanced
1921 pages
82h 13m
English
CRC Press
Content preview from Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
91-6 Signal Processing
It is better to model signals with very high-output impedance as current sources (Figure 91.2b). e
current through the detector will be
i i
Z
Z Z
d s
s
d s
=
+
(91.2)
In order for i
d
= i
s
, it is required that Z
d
Z
s
, which is easier to achieve than Z
d
Z
s
. If Z
d
is not low
enough, then there is a shunting eect. Qualitatively, Z
d
/Z
s
should be small enough for the ADC not to
detect that Z
d
is nonzero.
91.4 General Amplier Parameters
A voltage amplier produces an output voltage which is a proportional reproduction of the voltage dif-
ference
at its input terminals, regardless of any common-mode voltage and without loading t
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Publisher Resources

ISBN: 9781439848913