M65853 Mitsubishi, M65853 Datasheet - Page 12

• Manufacturer Part Number: M65853
• Description: DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT
• Manufacturer: Mitsubishi

Gv(max)=47dB,fcl=225Hz
R1=0 ,C1=0.47µF
(4) Microphone amplifier
as follows.
Gv=20log•
(3) Clock oscillator circuit
Assuming Gv=37dB, fcl=220Hz,for instance,
the constants take the following values.
R1=3.3K ,C1=0.15µF
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.
The gain(Gv) and low cut-off frequency(fcl) of microphone amplifier are expressed
Rc
DC Current
R1+1.5K+334K
R1+1.5K
DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT
1
Clock frequency:fck
oscillator
fcl=
Clock
circuit
2 •(R1+1.5K)•C1
MITSUBISHI
ELECTRIC
1
fck = 4 MHz(Rc=22K )
MITSUBISHI SOUND PROCESSOR ICs
MIC
M65853FP
0.22µF
10k
1.5k
3
(
1 2
10k
REF
5
/ 1 7 )
R1
KARAOKE
50
C1
334k
(typ)
S
S
E
E
R
R
I
I
E
E
S
S
6