參數(shù)資料
型號(hào): M65854FP
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(yè)數(shù): 11/14頁(yè)
文件大?。?/td> 102K
代理商: M65854FP
ELECTRIC
MITSUBISHI
( 1 1
M65854FP
MITSUBISHI SOUND PROCESSOR ICs
KARAOKE
50
S E R I E S
S E R I E S
S E R I E S
DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT
(6) 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
13
14
15
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=
C1 X C2
Q=
C1
C2
1
3
=
1
2
π
X 24k
X
4700pF X 1000pF
3.1KHz
0.72 (Figure of 0.7 is recommended)
(5)ALC level diagram
-30
-20
-10
0
+2
10
-50 -40 -30 -20 -10
Vi(dBV)
MICROPHONE AMPLIFIER GAIN SETTIG=47dB
ALC OPERATING VOLTAGE SETTING RANGE
Vo(dBV)
-60
-70
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