參數(shù)資料
型號: AK4534
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 16Bit CODEC with MIC/HP/SPK-AMP
中文描述: 16位編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù): 27/64頁
文件大小: 443K
代理商: AK4534
ASAHI KASEI
[AK4534]
MS0133-E-03
2003/5
- 27 -
n
De-emphasis Filter
The AK4534 includes the digital de-emphasis filter (tc = 50/15
μ
s) by IIR filter. Setting the DEM1-0 bits enables the
de-emphasis filter.
DEM1
DEM0
0
0
0
1
1
0
1
1
Table 16. De-emphasis Control
n
Bass Boost Function
The BST1-0 bits control the amount of low frequency boost applied to the DAC output signal. If the BST1-0 bits are set to
“10” (MID 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 10 shows the boost frequency response at –20dB signal input.
Mode
44.1kHz
OFF
48kHz
32kHz
Default
Figure 10. Boost Frequency (fs=44.1kHz)
BST1
0
0
1
1
BST0
0
1
0
1
Mode
OFF
MIN
MID
MAX
Default
Table 17. Low Frequency Boost Control
Boost Frequency (fs=44.1kHz)
-25
-20
-15
-10
-5
0
0.01
0.1
1
10
Frequency [kHz]
O
MIN
MID
MAX
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