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AN2182 数据表(PDF) 8 Page - STMicroelectronics

部件名 AN2182
功能描述  Filters using the ST10 DSP library
PDF  18 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

AN2182 数据表(HTML) 8 Page - STMicroelectronics

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Low-pass filter
AN2182
8/18
By fixing a number of points N and a sampling period Ts, the FIR coefficients h(n)
corresponding to a low-pass filter with a cutoff frequency Fc are
if n = 0 .. N – 1 and 0 if n > N – 1.
hn
()
2
F
c
F
s
------
c 2F
c
n
N1
–
2
-------------
–
⎝⎠
⎛⎞ T
s
⎝⎠
⎛⎞
Wn
N1
–
2
-------------
–
⎝⎠
⎛⎞
⋅
sin
=
(4)



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