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WM8602SEDS/V Arkusz danych(PDF) 34 Page - Wolfson Microelectronics plc

Numer części WM8602SEDS/V
Szczegółowy opis  2.1 CHANNEL PWM CONTROLLER
PDF  46 Pages
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Producent  WOLFSON [Wolfson Microelectronics plc]
Strona internetowa  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8602SEDS/V Arkusz danych(HTML) 34 Page - Wolfson Microelectronics plc

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WM8602
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PP Rev 1.5 May 2004
34
INTERPOLATION FILTERS
The WM8602 uses two types of interpolation filters, selected according to sampling frequency, as
shown in Table 39.
SAMPLING FREQUENCY
FILTER TYPE
INTERPOLATION
Main Channels
Main Channels
SUB
32kHz
0
12x
6x
44.1kHz
0
8x
4x
48kHz
0
8x
4x
88.2kHz
0
4x
2x
96kHz
0
4x
2x
176.4kHz
1
2x
1x
192kHz
1
2x
1x
Table 40 Interpolation Filter Types
FILTER TYPE 0
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Filter
Passband
±0.05 dB
0.454
fs
Stopband
-3dB
0.484
fs
Passband ripple
±0.05
dB
Stopband Attenuation
f > 0.546fs
-60
dB
Group Delay
23
samples
Table 41 Digital Filter 0 Characteristics
FILTER TYPE 1
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Filter
Passband
0.242
fs
Stopband
0.723
fs
Passband ripple
±0.05
dB
Stopband Attenuation
-60
dB
Group Delay
6
samples
Table 42 Digital Filter 1 Characteristics
The subwoofer filter characteristic is defined in table
FILTER TYPE SUBWOOFER
PARAMETER
SYMBOL
TEST CONDITIONS
-0.1dB
-3dB
UNIT
Sample Rate
32k
2.0
10.7
kHz
44k1
2.7
14.5
kHz
48k
3.0
15.8
kHz
88k2
6.1
32.1
kHz
96k
6.8
34.9
kHz
176k
*
*
kHz
192k
*
*
kHz
Table 43 Subwoofer Filter Characteristic
Note: * indicates no interpolation filters



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