參數(shù)資料
型號: AK4640
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 16BIT CODEC WITH MIC /HP/SPK-AMPl
中文描述: 16位編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植,AMPl
文件頁數(shù): 32/76頁
文件大?。?/td> 634K
代理商: AK4640
ASAHI KASEI
[AK4640]
MS0273-E-00
2004/03
- 32 -
De-emphasis Filter
The AK4640 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 16).
DEM1
DEM0
0
0
0
1
1
0
1
1
Table 16. De-emphasis Control
Bass Boost Function
The BST1-0 bits control the amount of low frequency boost applied to the DAC output signal (Table 17) . 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 21 shows the boost frequency response at –20dB signal input.
Mode
44.1kHz
OFF
48kHz
32kHz
Default
Figure 21. 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
相關(guān)PDF資料
PDF描述
AK4640VG 16BIT CODEC WITH MIC /HP/SPK-AMPl
AK4640VN 16BIT CODEC WITH MIC /HP/SPK-AMPl
AK4642EN Stereo CODEC with MIC/HP/SPK-AMP
AK4643EN Stereo CODEC with MIC/HP/RCV/SPK-AMP
AK4645EZ Stereo CODEC with MIC/HP-AMP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4640_05 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit ツヒ CODEC with MIC/HP/SPK-AMP
AK4640VG 制造商:AKM 制造商全稱:AKM 功能描述:16BIT CODEC WITH MIC /HP/SPK-AMPl
AK4640VN 制造商:AKM 制造商全稱:AKM 功能描述:16BIT CODEC WITH MIC /HP/SPK-AMPl
AK4641 制造商:AKM 制造商全稱:AKM 功能描述:16 BIT CODEC WITH BLUETOOTH INTERFACE
AK4641EN 制造商:AKM 制造商全稱:AKM 功能描述:16bit stereo CODEC with built-in Microphone-amplifier and 16bit Mono CODEC for Bluetooth Interface.