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WM8985GEFL/R Datasheet(PDF) 112 Page - Wolfson Microelectronics plc

No. de pieza WM8985GEFL/R
Descripción Electrónicos  Multimedia CODEC With Class D Headphone and Line Out
PDF  118 Pages
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Fabricante Electrónico  WOLFSON [Wolfson Microelectronics plc]
Página de inicio  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8985GEFL/R Datasheet(HTML) 112 Page - Wolfson Microelectronics plc

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WM8985
Pre-Production
w
PP, Rev 3.5, March 2007
112
5-BAND EQUALISER
The WM8985 has a 5-band equaliser which can be applied to either the ADC path or the DAC path.
The plots from Figure 50 to Figure 63 show the frequency responses of each filter with a sampling
frequency of 48kHz, firstly showing the different cut-off/centre frequencies with a gain of
±12dB, and
secondly a sweep of the gain from -12dB to +12dB for the lowest cut-off/centre frequency of each
filter.
10
-1
10
0
10
1
10
2
10
3
10
4
10
5
-15
-10
-5
0
5
10
15
Frequency (Hz)
10
-1
10
0
10
1
10
2
10
3
10
4
10
5
-15
-10
-5
0
5
10
15
Frequency (Hz)
Figure 50 EQ Band 1 Low Frequency Shelf Filter Cut-offs
Figure 51 EQ Band 1 Gains for Lowest Cut-off Frequency
10
-1
10
0
10
1
10
2
10
3
10
4
10
5
-15
-10
-5
0
5
10
15
Frequency (Hz)
10
-1
10
0
10
1
10
2
10
3
10
4
10
5
-15
-10
-5
0
5
10
15
Frequency (Hz)
Figure 52 EQ Band 2 – Peak Filter Centre Frequencies,
EQ2BW=0
Figure 53
EQ Band 2 – Peak Filter Gains for Lowest Cut-off
Frequency, EQ2BW=0
10
-2
10
-1
10
0
10
1
10
2
10
3
10
4
-15
-10
-5
0
5
10
15
Frequency (Hz)
Figure 54 EQ Band 2 – EQ2BW=0, EQ2BW=1



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