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參數(shù)資料
| 型號： | M65856 |
| 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)： | 12/17頁 |
| 文件大小： | 100K |
| 代理商： | M65856 |
ELECTRIC
MITSUBISHI
M65856SP
MITSUBISHI SOUND PROCESSOR ICs
DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT
(3) Clock oscillator circuit
This IC incorporates a current control type clock oscillator circuit in it, thus providing
circuit configuration just by connecting an Rc for current control pin 2 (MCLKCONT).
Fully internal clock supply prevents occurrence of undesired radiation without affecting
any external circuit.
The oscillator frequency fck is following.
fck = 2 MHz(Rc=56K
)
Rc
Clock
oscillator
circuit
Clock frequency:fck
2
DC Current
(4) Microphone amplifier
The gain(Gv) and low cut-off frequency(fcl) of microphone amplifier are expressed
as follows.
6
7
334k
1.5k
4
10k
(typ)
10K
MIC
R1
C1
1μF
REF
Gv=20log R1+1.5K+334K
R1+1.5K
fcl=
1
2
π
(R1+1.5K) C1
Gv(max)=47dB,fcl=48.2Hz
R1=0
,C1=2.2μF
Assuming Gv=37dB, fcl=15.1Hz,for instance,
the constants take the following values.
R1=3.3K
,C1=2.2μF
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| M65856SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT |
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