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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)： | 13/17頁 |
| 文件大?。?/td> | 100K |
| 代理商： | M65856SP |
ELECTRIC
MITSUBISHI
M65856SP
MITSUBISHI SOUND PROCESSOR ICs
DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT
ALC operating voltage can be set at a desired value between -10dBV and +3dBV by varying
the DC voltage applied to pin 3 (ALC operating voltage setting terminal).
(Setting method)
(6)ALC operating voltage setting
To set ALC operating voltage at -5dB(Vcc=5V)
-5dBV=0.56Vrms=1.59Vp-p=0.8Vp-o
V
ALC
=2.5-0.8=1.7V
Since the input impedance at pin 5 10 is high at 1M
or more,
it is possible to provide ALC operating voltage by dividing resistance.
ONE SIDE
PEAK VOLTAGE,Vpo
VOLTAGE APPLIED TO 35 PIN,VALC
OV
VALC=
Vcc-Vpo
2
1
2.5V( Vcc)
INTERNAL DC BIAS
3
R
Vcc
51k
0.01μ
When Vcc=5V
Voltage applied to
pin 5 10 VALC(V)
0.50
1.09
1.38
1.61
1.79
1.94
2.05
ALC operating
voltage (dBV)
+3
0
-2
-4
-6
-8
-10
Resistance R(
)
5.6k
15k
20k
24k
27k
33k
36k
(5)ALC level diagram
-30
-20
-10
0
+3
10
-50 -40 -30 -20 -10
MICROPHONE AMPLIFIER GAIN SETTIG=47dB
ALC OPERATING VOLTAGE SETTING RANGE
Vo(dBV)
Vi(dBV)
-60
-70
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