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WM8985GEFL/R датащи(PDF) 111 Page - Wolfson Microelectronics plc

номер детали WM8985GEFL/R
подробное описание детали  Multimedia CODEC With Class D Headphone and Line Out
PDF  118 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8985GEFL/R датащи(HTML) 111 Page - Wolfson Microelectronics plc

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Pre-Production
WM8985
w
PP, Rev 3.5, January 2007
111
HIGHPASS FILTER
The WM8985 has a selectable digital highpass filter in the ADC filter path. This filter has two
modes, audio and applications. In audio mode the filter is a 1st order IIR with a cut-off of around
3.7Hz. In applications mode the filter is a 2nd order high pass filter with a selectable cut-off
frequency.
-40
-35
-30
-25
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-15
-10
-5
0
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0
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45
Frequency (Hz)
Figure 46 ADC Highpass Filter Response, HPFAPP=0
-60
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-40
-30
-20
-10
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0
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Frequency (Hz)
-80
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-60
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-10
0
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Frequency (Hz)
Figure 47 ADC Highpass Filter Responses (48kHz),
HPFAPP=1, all cut-off settings shown
Figure 48 ADC Highpass Filter Responses (24kHz),
HPFAPP=1, all cut-off settings shown
-90
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Frequency (Hz)
Figure 49 ADC Highpass Filter Responses (12kHz),
HPFAPP=1, all cut-off settings shown



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