MITSUBISHI SOUND PROCESSOR ICs
S E R IE S
S E R IE S
M65850P/FP
DIGITAL ECHO(DIGITAL DELAY)
50
KARAOKE
(3) Input/output LPF
It is necessary to change the LPF setting ( signal pass band,fsig )
of digital echo according to the clock frequency. ( Refer to the table below )
LPF1
LPF2
REF
REF
1*
2*
*
*
9
*
8
*
(FP:3)
(FP:2)
(FP:9)
(FP:10)
*
C2
R1
*
C2
R1
R2
R2
R1
R1
C1
C1
1
•
fsig=
• •
2p C1 • C2 • R1 • R2
Distortion
Delay time
( ms )
Clock
frequency( Hz )
signal pass
band ( Hz )
LPF
(Reference value)
(%)
R1( W) R2 ( W) C1 (F) C2 (F)
0.2%
(Td=20ms)
0.3%
11.0M ~ 5.5M
7k
15~30
31~100
101~200
15k
13k
16k
15k 3300p 680p
13k 4700p 1000p
5.3M ~ 1.64M
1.62M ~ 800k
5k
3k
(Td=50ms)
1.2%
(Td=160ms)
16k
6800p 1500p
•Test Condition is Vcc=5V,Vi=100mV(rms),f=1kHz,Ta=25°C
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MITSUBISHI [ Mitsubishi Group ]
