M65855FP 查看數據表（PDF） - MITSUBISHI ELECTRIC
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M65855FP Datasheet PDF : 10 Pages
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PRELIMINARY Nsootmicee ;pTahraismiestnrioctliamfiitnsaal rsepseucbifijceacttioton.change.
MITSUBISHI SOUND PROCESSOR IC's
50 M65855FP
SERIES
KARAOKE
(4) Input/Output LPF
It is necessary to change the LPF setting (signal pass band;fsig)of digital
echo according to the clock frequency.
A/D LPF
REF
10
11
C2
R2
R3
R1
C1
1
fsig=
2π C1•C2•R2•R3
Gv=20log R2
R1
When,R1=20K,R2=8.2K,R3=10K,C1=0.012µF,
C2=4700pF, cut off frequency and voltage gain
is following.
fsig= 2.3KHz
Gv= -6dB
The recommend voltage gain and the A/D ,D/A LPF signal pass
band, please refer to the table below.
( Delay time 164msec (When Master clock 1MHz))
A/D LPF
Signal pass band
Gain
3KHz
-6dB
D/A LPF
Signal pass band
Gain
3KHz
+3dB
MITSUBISHI
ELECTRIC
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