參數(shù)資料
型號： AK4671EG
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： Codec
英文描述： Stereo CODEC with MIC/RCV/HP-AMP
中文描述： 立體聲編解碼器麥克風/垃圾車/惠普腺苷
文件頁數(shù)： 64/164頁
文件大?。?/td> 1792K
代理商： AK4671EG
[AK4671]
MS0666-E-00
2007/10
- 64 -
(3)
Stereo Separation Emphasis Filter (FIL3)
FIL3 is used to emphasize the stereo separation of stereo mic recording data or playback data. F3A13-0 and F3B13-0 bits
set the filter coefficient of FIL3. FIL3 becomes High Pass Filter (HPF) at F3AS bit = “0”, and Low Pass Filter (LPF) at
F3AS bit = “1”. FIL3 bit controls ON/OFF of FIL3. When Stereo Separation Emphasis Filter is OFF, the audio data
passes this block by 0dB gain. The coefficient should be set when FIL3 bit = “0” or PMADL = PMADR = PMDAL =
PMDAR bits = “0”.
1)
When FIL3 is set to “HPF”
fs: Sampling frequency
fc: Cut-off frequency
K: Filter gain [dB] (0dB
≥
K
≥
10dB)
Register setting (
Note 61
)
FIL3: F3AS bit = “0”, F3A[13:0] bits =A, F3B[13:0] bits =B
(MSB=F3A13, F3B13; LSB=F3A0, F3B0)
1 / tan (
π
fc/fs)
B =
1 + 1 / tan (
π
fc/fs)
A = 10
K/20
x
1 + 1 / tan (
π
fc/fs)
1
1 / tan (
π
fc/fs)
,
Transfer function
H(z) = A
1
z
1
1 + Bz
1
2)
When FIL3 is set to “LPF”
fs: Sampling frequency
fc: Cut-off frequency
K: Filter gain [dB] (0dB
≥
K
≥
10dB)
Register setting (
Note 61
)
FIL3: F3AS bit = “1”, F3A[13:0] bits =A, F3B[13:0] bits =B
(MSB=F3A13, F3B13; LSB= F3A0, F3B0)
1
A = 10
K/20
x
1 + 1 / tan (
π
fc/fs)
B =
1
1 / tan (
π
fc/fs)
1 + 1 / tan (
π
fc/fs)
,
Transfer function
H(z) = A
1 + z
1
1 + Bz
1
相關PDF資料
PDF描述
AK4673 Stereo CODEC with MIC/HP-AMP and Touch Screen Controller
AK4673EG Stereo CODEC with MIC/HP-AMP and Touch Screen Controller
AK4682 Multi-channel CODEC with 2Vrms Stereo Selector
AK4682EQ Multi-channel CODEC with 2Vrms Stereo Selector
AK4683_07 Asynchronous Multi-Channel Audio CODEC with DIR/T
相關代理商/技術參數(shù)
參數(shù)描述
AK4673 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP and Touch Screen Controller
AK4673EG 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP and Touch Screen Controller
AK4675 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/RCV/HP/SPK-AMP
AK4675EG 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/RCV/HP/SPK-AMP
AK4682 制造商:AKM 制造商全稱:AKM 功能描述:Multi-channel CODEC with 2Vrms Stereo Selector
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