WM8740
Production Data
1
0.8
0.6
0.4
0.2
0
1
0.8
0.6
0.4
0.2
0
-0.2
-0.2
-0.4
-0.4
0
10
20
30
40
50
60
0
10
20
30
40
50
60
Time (input samples)
Time (input samples)
Figure 13 Impulse Response (Normal Roll-off,
no De-emphasis)
Figure 14 Impulse Response (Slow Roll-off,
no De-emphasis)
0.0
-1.0
-2.0
-3.0
-4.0
-5.0
-6.0
-7.0
-8.0
-9.0
-10.0
0.0
-1.0
-2.0
-3.0
-4.0
-5.0
-6.0
-7.0
-8.0
-9.0
-10.0
0
2000
4000
6000
8000
10000
12000
14000
16000
0
5000
10000
15000
20000
Frequency (Fs)
Frequency (Fs)
Figure 15 De-emphasis frequency response (fs=32kHz)
Figure 16 De-emphasis frequency response (fs=44.1kHz)
0.0
-1.0
-2.0
-3.0
-4.0
-5.0
-6.0
-7.0
-8.0
-9.0
-10.0
0.4
0.3
0.2
0.1
0.0
-0.1
-0.2
-0.3
-0.4
0
2000
4000
6000
8000
10000 12000 14000 16000 18000 20000
0
2000
4000
6000
8000
10000
12000
14000
16000
Frequency (Fs)
Frequency (Fs)
Figure 17 De-emphasis frequency response (fs=48kHz)
Figure 18 De-emphasis frequency response error
(fs=32kHz)
PD Rev 4.0 April 2004
19
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
