參數(shù)資料
型號(hào): AKD4564
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類(lèi): Codec
英文描述: 16BIT CODEC WITH BUILT-IN ALC AND MIC/HP/SPK-AMP
中文描述: 16位編解碼器,配有ALC和麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁(yè)數(shù): 26/48頁(yè)
文件大小: 382K
代理商: AKD4564
ASAHI KASEI
[AK4564]
MS0140-E-01
2002/07
- 26 -
n
Digital EQ/HPF/LPF Circuits
The AK4564 performs equalizing, filtering and ALC (Automatic Level Control) by digital domain for A/D converter
data. The equalizing circuit emphasizes stereo separation when using internal microphone. LPF1, LPF2 and HPF2 are IIR
filters of 1
st
order to compensate frequency response of microphone and etc. HPF3 is IIR filter of 2
nd
order to cut a
wind-noise. Refer to the section of “ALC1 operation” about ALC1.
Rch
Lch
HPF3
ALC1
LPF2
HPF3
ALC1
LPF2
HPF1
HPF1
Rch
Lch
+
Equalizing
Filtering
+
MIX
HPF2
HPF2
wind-noise cut
MIX
LPF1
LPF1
Main
Main
Sub
Sub
Figure 21. Digital EQ/HPF/LPF
相關(guān)PDF資料
PDF描述
AK4565 LOW POWER 20BIT CODEC WITH BUILT IN ALC
AK4565VF LOW POWER 20BIT CODEC WITH BUILT IN ALC
AK4566 20bit Stereo CODEC with built-in IPGA & HP-AMP
AK4566VN 20bit Stereo CODEC with built-in IPGA & HP-AMP
AK4569 20-Bit Stereo CODEC with IPGA & HP-AMP
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