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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) |
| 文件頁數(shù)： | 10/14頁 |
| 文件大小： | 102K |
| 代理商： | M65854FP |
ELECTRIC
MITSUBISHI
( 1 0
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
(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 1 (MCLKCONT).
Fully internal clock supply prevents occurrence of undesired radiation without affecting
any external circuit.
The oscillator frequency fck is following.
fck = 4 MHz(Rc=22K
)
Rc
Clock
oscillator
circuit
Clock frequency:fck
1
DC Current
(4) Microphone amplifier
The gain(Gv) and low cut-off frequency(fcl) of microphone amplifier are expressed
as follows.
4
5
334k
1.5k
2
10k
(typ)
10k
MIC
R1
C1
0.22μF
REF
Gv=20logR1+1.5K+334K
R1+1.5K
fcl=
1
2
π
(R1+1.5K)C1
Gv(max)=47dB,fcl=225Hz
R1=0
,C1=0.47μF
Assuming Gv=37dB, fcl=220Hz,for instance,
the constants take the following values.
R1=3.3K
,C1=0.15μF
fck = 4 MHz(Rc = 22K
Delay time = 196.6msec
)
Note:
The delay time (Td) for echo is determined by the clock
frequency (fck).
Delay time = 1/fckX48XN
(N = the number of memory bits = 16384
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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 |
| M65856SP(#TG0G) | 制造商:Renesas Electronics Corporation 功能描述: |
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