參數(shù)資料
型號(hào): AK4343EN
廠商: Asahi Kasei Microsystems Co.,Ltd
英文描述: Stereo DAC with HP/RCV/SPK-AMP
中文描述: 立體聲DAC惠普/垃圾車/胰腎聯(lián)合移植腺苷
文件頁(yè)數(shù): 46/98頁(yè)
文件大小: 851K
代理商: AK4343EN
ASAHI KASEI
[AK4343]
MS0478-E-01
2006/10
- 46 -
De-emphasis Filter
The AK4343 includes the digital de-emphasis filter (tc = 50/15
μ
s) by IIR filter. Setting the DEM1-0 bits enables the
de-emphasis filter (Table 33).
DEM1
DEM0
0
0
0
1
1
0
1
1
Table 33. De-emphasis Control
Bass Boost Function
The BST1-0 bits control the amount of low frequency boost applied to the DAC output signal (Table 34). If the BST1-0
bits are set to “01” (MIN Level), use a 47
μ
F capacitor for AC-coupling. If the boosted signal exceeds full scale, the analog
output clips to the full scale. Figure 35 shows the boost frequency response at –20dB signal input.
Mode
44.1kHz
OFF
48kHz
32kHz
Default
Boost Filter (fs=44.1kHz)
-25
-20
-15
-10
-5
0
10
100
1000
10000
Frequency [Hz]
L
MAX
MID
MIN
Figure 35. Bass Boost Frequency Response (fs=44.1kHz)
BST1
0
0
1
1
BST0
0
1
0
1
Mode
OFF
MIN
MID
MAX
Default
Table 34. Bass Boost Control
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