參數資料
型號: AK4646EZ
廠商: ASAHI KASEI POWER DEVICES CORP
元件分類: 消費家電
英文描述: Stereo CODEC with MIC/SPK-AMP
中文描述: SPECIALTY CONSUMER CIRCUIT, PQCC32
封裝: 4 X 4 MM, 0.40 MM PITCH, LEAD FREE, PLASTIC, QFN-32
文件頁數: 35/78頁
文件大?。?/td> 808K
代理商: AK4646EZ
[AK4646EZ]
MS0630-E-00
2007/06
- 35 -
(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 = PMDAC 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 36)
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 36)
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
AK4646 Stereo CODEC with MIC/SPK-AMP
AK4646EN Stereo CODEC with MIC/SPK-AMP
AK4647 Stereo CODEC with MIC/HP-AMP
AK4647VN Stereo CODEC with MIC/HP-AMP
AK4648 Stereo CODEC with MIC/HP/SPK-AMP
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參數描述
AK4647 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP
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AK4647VQ 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP
AK4648 制造商:AKM 制造商全稱:AKM 功能描述:stereo CODEC with MIC/HP/SPK amplifier
AK4648EC 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP/SPK-AMP