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WM8980 датащи(PDF) 75 Page - Wolfson Microelectronics plc

номер детали WM8980
подробное описание детали  STEREO CODEC WITH SPEAKER DRIVER AND BUFFER
PDF  81 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8980 датащи(HTML) 75 Page - Wolfson Microelectronics plc

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WM8980
w
PP Rev 1.6 January 2005
75
5-BAND EQUALISER
The WM8980 has a 5-band equaliser which can be applied to either the ADC path or the DAC path.
The plots from Figure 42 to Figure 55 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 42 EQ Band 1 Low Frequency Shelf Filter Cut-offs
Figure 43 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 44 EQ Band 2 – Peak Filter Centre Frequencies,
EQ2BW=0
Figure 45
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 46 EQ Band 2 – EQ2BW=0, EQ2BW=1



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