參數(shù)資料
型號: AK4646
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: Stereo CODEC with MIC/SPK-AMP
中文描述: 立體聲編解碼器麥克風/胰腎聯(lián)合移植腺苷
文件頁數(shù): 36/79頁
文件大?。?/td> 789K
代理商: AK4646
[AK4646]
MS0557-E-02
2007/05
- 36 -
(4)
Gain Compensation (EQ0)
Gain Compensation is used to compensate the frequency response and the gain that is changed by Stereo Separation
Emphasis Filter. Gain Compensation is composed of the Equalizer (EQ0) and the Gain (0dB/+12dB/+24dB). E0A15-0,
E0B13-0 and E0C15-0 bits set the coefficient of EQ0. GN1-0 bits set the gain (Table 22). EQ0 bit controls ON/OFF of
EQ0. When EQ is OFF and the gain is 0dB, the audio data passes this block by 0dB gain. The coefficient should be set
when EQ0 bit = “0” or PMADL=PMADR= PMDAC bits = “0”.
fs: Sampling frequency
fc
1
: Pole frequency
fc
2
: Zero-point frequency
K: Filter gain [dB] (Maximum +12dB)
Register setting (Note 34)
E0A[15:0] bits =A, E0B[13:0] bits =B, E0C[15:0] bits =C
(MSB=E0A15, E0B13, E0C15; LSB=E0A0, E0B0, E0C0)
1 + 1 / tan (
π
fc
2
/fs)
B =
1 + 1 / tan (
π
fc
1
/fs)
A = 10
K/20
x
1 + 1 / tan (
π
fc
1
/fs)
1
1 / tan (
π
fc
1
/fs)
,
C =10
K/20
x
1
1 / tan (
π
fc
2
/fs)
1 + 1 / tan (
π
fc
1
/fs)
,
Transfer function
H(z) =
A + Cz
1
1 + Bz
1
Gain[dB]
K
fc
1
fc
2
Frequency
Figure 28. EQ0 Frequency Response
GN1
0
0
1
Table 22. Gain select of gain block (x: Don’t care)
GN0
0
1
x
Gain
0dB
+12dB
+24dB
(default)
相關(guān)PDF資料
PDF描述
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
AK4648EC Stereo CODEC with MIC/HP/SPK-AMP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4646_11 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/SPK-AMP
AK4646EN 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/SPK-AMP
AK4646ENP-L 制造商:Asahi Kasei Microsystems Co Ltd 功能描述:STEREO CODEC+SPK
AK4646EZ 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/SPK-AMP
AK4647 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP