參數(shù)資料
型號: AK4645EZ
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: Stereo CODEC with MIC/HP-AMP
中文描述: 立體聲編解碼器麥克風/惠普腺苷
文件頁數(shù): 49/96頁
文件大小: 933K
代理商: AK4645EZ
[AK4645EZ]
MS0605-E-00
2007/06
- 49 -
De-emphasis Filter
The AK4645 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 37).
DEM1
DEM0
0
0
0
1
1
0
1
1
Table 37. De-emphasis Control
Bass Boost Function
The BST1-0 bits control the amount of low frequency boost applied to the DAC output signal (Table 38). 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 38 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 38. Bass Boost Frequency Response (fs=44.1kHz)
BST1
0
0
1
1
BST0
0
1
0
1
Mode
OFF
MIN
MID
MAX
Default
Table 38. Bass Boost Control
相關PDF資料
PDF描述
AK4645 Stereo CODEC with MIC/HP-AMP
AK4646EZ Stereo CODEC with MIC/SPK-AMP
AK4646 Stereo CODEC with MIC/SPK-AMP
AK4646EN Stereo CODEC with MIC/SPK-AMP
AK4647 Stereo CODEC with MIC/HP-AMP
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