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參數資料
| 型號： | M61512FP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | 5.1ch Electronic Volume |
| 中文描述： | 5.1聲道電子音量 |
| 文件頁數： | 11/13頁 |
| 文件大?。?/td> | 254K |
| 代理商： | M61512FP |
MITSUBISHI SOUND PROCESSORS
M61512FP
5.1ch Electronic Volume
MITSUBISHI
ELECTRIC
11 13
We let
ω
is 2
π
×
70Hz and Q is 10 in the case of the cutoff
frequency is 70Hz and Q is 10.
We let C1=C2=Cf are 0.1μF.
From equation(1),(2),(3)
Rf=23.5K
R1=1.18K
R2=470K
R1 become about 1.2K
,and R2 become about 470
(5)Equivalent circuit of Bass Boost
+
-
INPUT
The circuit for decrease in
switching noise
OUTPUT
SEL
200
Go
0dB
Q=4(G=10dB)
fo
The circuit figure of positive feedback two order high pass
filter circuit on bass boost part.
+K
VIN
VOUT
C1
C2
R2
R1
The amplitude characteristics of two
order high pass filter circuit (Reference)
Q
1
2
4
5
10
G0
0~1dB
6dB
10dB
13dB
20dB
The transmission function is
VOUT
VIN
=
Ks
2
s
2
+ s
1
R2C1
1
R2C2
1
R1C1
+(1-K)
1
R1R2C1C2
+
+
1
R1R2C1C2
ω
o
2 =
Q=
1
R1C1
R2C2
R1C2
R2C1
R2C2
R1C1
+(1-K)
+
The bass boost part is consist of two order high pass filter circuit.
We show an example how to calculate design value of bass boost part.
We let C1=C2 are Cf and K is +1.
Above equation is shown below.
Rf=1/(0Cf) (1)
R1=Rf/2Q (2)
R2=2QRf (3)
RL=70K
OVER(Notice)
(Notice)Please set the load resistance on “fl-out(pin46)” or “fr-out(pin53)” at RL=70K
over.
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