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WM8973CLGEFL/V データシート(PDF) 57 Page - Wolfson Microelectronics plc

部品番号 WM8973CLGEFL/V
部品情報  Stereo CODEC for Portable Audio Applications
PDF  63 Pages
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メーカー  WOLFSON [Wolfson Microelectronics plc]
ホームページ  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8973CLGEFL/V データシート(HTML) 57 Page - Wolfson Microelectronics plc

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Production Data
WM8973L
w
PD, Rev 4.5, December 2011
57
-10
-8
-6
-4
-2
0
0
5000
10000
15000
20000
Frequency (Fs)
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0
5000
10000
15000
20000
Frequency (Fs)
Figure 46 De-emphasis Frequency Response (44.1kHz)
Figure 47 De-emphasis Error (44.1kHz)
-10
-8
-6
-4
-2
0
0
5000
10000
15000
20000
Frequency (Fs)
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0
5000
10000
15000
20000
Frequency (Fs)
Figure 48 De-emphasis Frequency Response (48kHz)
Figure 49 De-emphasis Error (48kHz)
HIGHPASS FILTER
The WM8973L has a selectable digital highpass filter in the ADC filter path to remove DC offsets. The filter response is
characterised by the following polynomial:
Figure 50 ADC Highpass Filter Response
1 - z-1
1 - 0.9995z-1
H(z) =
-15
-10
-5
0
0
0.0005
0.001
0.0015
0.002
Frequency (Fs)



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