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WM8771 Arkusz danych(PDF) 39 Page - Wolfson Microelectronics plc

Numer części WM8771
Szczegółowy opis  24-bit, 192kHz 8-Channel Codec
PDF  44 Pages
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Producent  WOLFSON [Wolfson Microelectronics plc]
Strona internetowa  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8771 Arkusz danych(HTML) 39 Page - Wolfson Microelectronics plc

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WM8771
w
PP Rev 2.0 December 2001
39
ADC FILTER RESPONSES
-80
-60
-40
-20
0
0
0.5
1
1.5
2
2.5
3
Frequency (Fs)
Figure 26 ADC Digital Filter Frequency Response
-0.02
-0.015
-0.01
-0.005
0
0.005
0.01
0.015
0.02
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
Frequency (Fs)
Figure 27 ADC Digital Filter Ripple
ADC HIGH PASS FILTER
The WM8771 has a selectable digital highpass filter to remove DC offsets. The filter response is characterised by the
following polynomial.
Figure 28 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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