Casio CZ-1 - Page 111

21.
Stereo
Chorus
Circuit
21.1.
BLOCK
DIAGRAM
From
Sample/
Hold
circuit
MLL
Amp.
X-COM
Amp.
MLR
^
Y-COM
I?
If*
ox
OY
OZ
Amp.
1Z
Amp.
Three
phase
LFO
(0.56
Hz)
plA
*2A
*3A
01 B
*?B
*3B
Three
phas«
LFO
(7.14
Hz)
MLTH
(Original melody
signal
of left)
MRTH
(Original melody
signal
of right)
MMTH
(Original melody
signal
of
mix)
.
To
VCA mixer circuit
on PCB
AS1M
MTH
(Original melody signal
for
stereo
chorus)
To
Chorus
VR
mixer
on PCB
CN2N
Filter
A
Compressor
VCO
VCO
BBD1
Filter
B
Expander
18k
Clock
i;
39k
BB0
2
Filter
B
Expander
Clock
BBD3
Finer
B
Expander
18k
Amp.
OUTR
(BBD
out
R)
39k
Amp.
VCO
Clock
B
OUT
L
(BBD
out
L)
Note:
BBD
: Bucket Brigade
Device
VCO
:
Voltage Controlled
Oscillator
VCA : Voltage Controlled Amplifier
LFO : Low Frequency Oscillator