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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
85-6 Signal Processing
In the next example, the order N of a low-pass Butterworth lter is to be determined whose cuto
fr
equency
(−
3
dB
)
is Ω
c
= 2 kHz and stopband attenuation is greater than 40 dB at Ω
s
= 6 kHz. us the
de
sired
lter
s
pecication
i
s
20 40log | ( )| ,H j
a s
(85.14)
or
e
quivalently,
| ( )| . ,H j
a s
0 01
(8
5
.15
)
It
f
ollows
f
rom
E
quation
8
5
.7
1
1
0 01
2
2
+
=
( )
( . )
s c
/
N
(85.16)
Solving the earlier equation for N gives N = 4.19. Since N must be an integer, a h-order lter is required
for this specication.
85.3.2 Chebyshev Filters or Chebyshev I Filters
e frequency response of an Nth-order Chebyshev low-pass lter ...
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Publisher Resources

ISBN: 9781439848913