WM8959
Pre-Production
DE-EMPHASIS FILTER RESPONSES
MAGNITUDE(dB)
MAGNITUDE(dB)
0.3
0.25
0.2
0
0
5000
10000
15000
20000
-1
-2
0.15
0.1
-3
0.05
0
-4
-5
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
-0.05
-0.1
-0.15
-6
-7
-8
Frequency (Hz)
-9
-10
Frequency (Hz)
Figure 91 De-Emphasis Digital Filter Response (32kHz)
Figure 92 De-Emphasis Error (32kHz)
MAGNITUDE(dB)
MAGNITUDE(dB)
0
0.2
0
5000
10000
15000
20000
25000
-1
-2
0.15
0.1
0.05
0
-3
-4
-5
-6
-7
0
5000
10000
15000
20000
25000
-8
-0.05
-0.1
-9
-10
Frequency (Hz)
Frequency (Hz)
Figure 93 De-Emphasis Digital Filter Response (44.1kHz)
Figure 94 De-Emphasis Error (44.1kHz)
MAGNITUDE(dB)
MAGNITUDE(dB)
0.15
0
0
5000
10000
15000
20000
25000
30000
0.1
0.05
0
-2
-4
-6
0
5000
10000
15000
20000
25000
30000
-8
-0.05
-0.1
-10
-12
-0.15
Frequency (Hz)
Frequency (Hz)
Figure 95 De-Emphasis Digital Filter Response (48kHz)
Figure 96 De-Emphasis Error (48kHz)
PP, May 2008, Rev 3.1
150
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
