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參數(shù)資料
| 型號： | BA3842 |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | Preset equalizer sound control (P.S.C) IC |
| 中文描述： | 預(yù)設(shè)均衡器聲音控制（PSC）集成電路 |
| 文件頁數(shù)： | 11/13頁 |
| 文件大?。?/td> | 237K |
| 代理商： | BA3842 |
573
Audio ICs
BA3842F
(6)
(
1) Low band
The low cutoff frequency fc of each mode is given by the
following equation :
fc = 1 / 2
π
CR = 1 / (2
π
C
When C = 0.22
μ
F,
fc 46 (Hz)
The fc value can be changed to make slight changes in
the boost and cutoff gain of each mode.
(
2) High band
The high cutoff frequencies fc of each mode are given by
the following equation :
fc = 1 / 2
π
CR
When C = 2200pF,
ROCK : R = 8.0k
JAZZ : R = 10.7k
CLASSIC : R = 14.9k
BGM. POP : R = 17.4k
fc 4.2 (kHz)
The fc values can be changed to make slight changes in
the boost and cutoff gain of each mode.
Note:
If a high or low fc value is changed, the gains of all modes
will change. The gain cannot be changed for only one
mode.
(7)
ALC
The band of ALC detection can be changed with the val-
ue of C
4
. It must be adjusted appropriately for the dynam-
ic bass boost f
O
. In the example application circuit C
4
=
0.1
μ
F, thus fc = 1 / 2
π
C
4
(R
5
/ / R
6
/ / R
7
)
160 (Hz)
Filter for preset equalizer
15.6k
)
fc 9.0 (kHz)
fc 6.8 (kHz)
fc 4.8 (kHz)
The detection wave is dually rectified. In the example ap-
plication circuit, it is 1.3V
rms
, but if the resistors R
8
and R
9
are connected as shown below, it will lower the ALC level.
Adjust the ALC level as needed. The detection band at
this time is :
fc = 1 / 2
π
C
4
(R
5
/ / R
6
/ / R
7
/ / R
8
/ / / R
9
)
(8)
Adjust the attack and release times with the resistors and
capacitors connected to the ALCC pin. The attack time
is determined by R
10
(1k
) and C
5
, and the release time
is determined by R
11
and C
5
. If the value set for C
5
is below
4.7
μ
F, the ALC level may become unstable.
Attack time and release time
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BA3842F | 制造商:ROHM 制造商全稱:Rohm 功能描述:Preset equalizer sound control (P.S.C) IC |
| BA3853 | 制造商:ROHM 制造商全稱:Rohm 功能描述:Stereo sound controller IC |
| BA3853AFS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
| BA3853BFS | 制造商:ROHM 制造商全稱:Rohm 功能描述:Stereo sound controller IC |
| BA3870 | 制造商:ROHM 制造商全稱:Rohm 功能描述:BBS (bass boost system) for radio cassette players |
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