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參數(shù)資料
| 型號： | M65856SP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT |
| 中文描述： | 數(shù)字回聲混合電路和麥克風(fēng) |
| 文件頁數(shù)： | 14/17頁 |
| 文件大?。?/td> | 100K |
| 代理商： | M65856SP |
ELECTRIC
MITSUBISHI
M65856SP
MITSUBISHI SOUND PROCESSOR ICs
DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT
(7) Input and output LPF for the digital echo
The input and output LPF for the digital echo are configured as shown.
figure below.
24k
24k
24k
C2:1000pF
C1:4700pF
Input
Output
15
16
17
The accuracy of the internal resistance of the IC is approximately ±30%
Cut-off frequency(fc) is given as follows.
1
2
π
x 24k
x
Quality factor (Q) is given by the following equation for long echo.
fc=
C1xC2
Q=
C1
C2
1
3
=
1
2
π
x24k
x
4700pF x1000pF=3.1KHz
..
14
2.2 μ
..
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