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參數(shù)資料
| 型號： | LC75421M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Electronic Volume Controller for Cars |
| 中文描述： | 汽車電子音量控制器 |
| 文件頁數(shù)： | 19/24頁 |
| 文件大小： | 392K |
| 代理商： | LC75421M |
No. 6866-19/24
LC75421M
Calculation example 2
Specification Mean frequency: f0 = 40 Hz
Gain during maximum boost: G = 12 dB
Let us use R1 = 0 k
, R2 = 45.054 k
, C1 = 2.2 uF, and C1 >> C2.
We obtain R3 from G = 12 dB.
We obtain C2 from mean frequency f0 = 40 Hz.
G
+12
dB
=
20
×
LOG
10
R
2
+
R
3
R
3
R
3
=
R
2
10
G
/20
–1
45054
3.98 – 1
=
≠
15
K
f
0
=
R
3
R
2
C
1
C
2
1
2
π
C2
=
=
1
(2
π
f
0)
2
R
2
R
3
C
1
1
(2
π
×
40)
2
×
45054
×
15000
×
(2.2
×
10
–6
)
≠
0.01
μ
F
Setting
f = 100 Hz
f = 1 kHz
14 dB
11.73
4.27
12 dB
10.29
4.07
10 dB
8.74
3.78
8 dB
7.11
3.38
6 dB
5.41
2.82
4 dB
3.65
2.09
2 dB
1.85
1.15
Simulation Results
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