m62481fp Mitsumi Electronics, Corp., m62481fp Datasheet - Page 22

• Manufacturer Part Number: m62481fp
• Description: Pickup Servo System With Automatic Adjustment
• Manufacturer: Mitsumi Electronics, Corp.

(19).FZC BLOCK
(19)-1.V
ON/OFF
1.Set R0,D7 (FZC OFF)=1.
2.Set pin 24 (JP1/SG) to "H".
3.Apply HF signal to pin 52 (C input).
4.R0,D11=R0,D10 (Dout Mode)=0.
5.Apply Vref to pin 8 (Shock in).
6.Increase voltage at pin 8 and monitor the DOUT1 pin.
7.When the voltage at the DOUT1 pin changes,the threshold is found.
8.Threshold voltage can be calculated as follows;
9.Apply Vref to pin 8 (Shock in).
10.Decrease voltage at pin 8 and monitor the DOUT1 pin.
11.When the voltage at the DOUT1 pin changes,the threshold is found.
12.Threshold voltage can be calculated as follows;
V
V
HF
iA
iA
D-62481-87I
V
V
FZC1
FZC1
FZC1 +
HF
ON/OFF
60k
30k
+ =Vpin8 - Vref
- =Vpin8 - Vref
,V
B
A
C
53
54
52
FZC1 -
60k
60k
30k
(K200);
47k
HF-IN
47k
12p
12p
5k
49
Buffer
Buffer
HFOUT
36p
BW WIDE
36p
BW WIDE
18k
30k
30k
48
0.001u
MRIN
A-B
47
PICKUP SERVO SYSTEM WITH AUTOMATIC ADJUSTMENT
HFOK
Detector
(
MITSUBISHI
balance2
Focus
balance1
Focus
FE1-IN
22
ELECTRIC
HFC
/ 88 )
(Vth=+/-0.7V)
Focus
gain1
42
37
MITSUBISHI SOUND PROCESSOR LSI
0.01u
27k
G800
FE1
HFOK
(offset)
Focus
gain3
36
FE1
FZC OFF
Focus
gain2
18k
FZC/Shock
Logic
100k
1k
47p
100k
FZC OFF
M62481FP
220k
FS ON
K200
(Vth=+/-0.12V)
Dout
Logic
FS HOLD
SHOCK IN
DOUT1
FE2+IN
35
22
8
VREF=1/2Vcc
DOUT1
Measure
V
V
pin8
pin35