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FL8370

2.3 Sled Servo Block

The moving of pick-up is controlled by tracking servo output through a low pass filter.
The sled kick voltage is outputted for track jump operation.

Figure 17. Sled servo block

2.4 Spindle Servo Block

The 20K

Ω

 resistor and 0.33uF capacitor form the 200Hz low pass filter, and the carrier component of

spindle servo error signals is eliminated. In CLV-S mode, SMEF becomes "L" and pin 25 low pass filter fc
lowers, strengthening the filter further. The characteristics of high frequency phase compensation in
focus tracking servo and the characteristics of cut off frequency in CLV low pass filter are tested by FSET
pin. 

Figure 18. Spindle servo block

-

43

44

42

PS

4      3

X 1

X 2

X 3

X 4

0      0

0      1

1      0

1      1

SLO

SL-

SL+

TM6

TM7

TM2

-

24

46

45

23

25

-

6

SMON

SMDP

22K

22K

15K

20K

15K

220K

220K

220K

220K

50K

100K

SMEF

FSET

SPDL-

SPDLO

Double
speed

17

FL8370

M/M-97-P006

1997. 10. 17

80-QFP-1420C

• CD Player

• Video-CD

• KS9286 Data Processor

• KS9284 Data Processor

• KA9258D/KA9259D Motor Driver 

KB9223

80-QFP-1420C

-20

°

C ~ +70

°

C

KB9223-L

The KB9223 is a 1-chip BICMOS integrated circuit to per-
form the function of RF amp and servo signal processor for
compact disc player applications.It consist of  blocks for RF
signal processing ,focus, tracking, sled and spindle
servo.Also this IC has adjustment free function and embed-
ded opamp for audio post filter.

• RF amplifier & RF equalizer

• Focus error amplifier & servo control

• Tracking error amplifier & servo control

• Mirror & defect detector circuit

• Focus OK detector circuit

• APC(Auto Laser Power Control) circuit for constant laser

power

• FE bias & focus servo offset adjustment free

• EF balance & tracking error gain adjustment free

• Embedded audio post filter

• The circuit for Interruption countermeasure

• Double speed play available

• Operating voltage range 

KB9223 : 5V 

KB9223-L : 3.4V

18

FL8370

M/M-97-P006

1997. 10. 17

Figure 1. Block diagram

73

74

65

66

63

67

68

79

69

70

71

78

76

75

32

33

77

2

4

RF Amp

59

Focus Error  Amp

FE-BIAS Adjustment

Tracking Error  Amp

E/F Balance & Gain
Control

APC Amp

LDON

Center Voltage Amp.

RF Level AGC 

Equalizer

EFM

Comparator

Defect Detection
Circuit

54

22

30

29

31

38

37

36

35

51

52

58

26

28

27

Micom Data

Interface  Logic

60

47

48

57

49

50

53

55

62

61

43

44

42

46

45

23

24

25

6

39

1

40

5

15

16

13

14

19

17

12

11

9

10

Focus  Phase
Compensation

& Offset cancel circuit

Tracking Phase
Compensation Block

& Jump Pulse GEN.

Sled Servo Amplifier

& Sled Kick GEN.

Spindle Servo LPF

( Double Speed )

Mirror Detection

Circuit

FOK Detection

Circuit

MICOM TO SERVO CONTROL

AUTO SEQUENCER

ADJUSTMENT-FREE CONTROL

Built-in  Post Filter Amp ( L&R )

FS1~
FS4

TM1~
TM6

BAL1~
BAL5

PS1~
PS4

GA1~
GA5

RF-

RFO

PD1

PD2

F

E

EI

PD

LD

VR

EQO

IRF

ASY

EFM

RFI

DCB

D

C

C

1

G

C

1

O

G

C

1

I

C

H

1

O

C

H

1

I

M

U

T

E

I

R

R

C

C

H

2

O

C

H

2

I

G

C

2

I

G

C

2

O

FDFCT

FE-

FEO

TDFCT

TE-

TEO

TE2

LPFT

SLO

SL-

SL+

SPDLO

SPDL-

SMDP

SMON

SMEF

FSET

MIRROR

MCP

FOK

TG2

TGU

F

E

1

T

E

1

M

L

T

T

Z

C

F

E

2

F

L

B

F

G

D

F

S

3

3

 &

W

D

C

H

T

R

C

N

T

L

O

C

K

IS

T

A

T

R

E

S

E

T

M

D

A

T

A

M

C

K

A

T

S

C

F

R

S

H

DCC2

FEBIAS

EQC

19

FL8370

M/M-97-P006

1997. 10. 17

Figure 2. Pin configuration

1

2

3

4

5

6

7

8

9

10

11 12

13

14

15

16

17

18 19

20 21

22 23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

64 63 62 61

60 59

58

57

56 55

54 53

52

51 50

49

48

47 46

45 44 43

42 41

80

79

78

77

76

75

74

73

72

71

70

69

68

67

66

65

M

C

P

D

C

B

F

R

S

H

D

C

C

2

D

C

C

1

F

S

E

T

V

D

D

A

V

C

C

P

G

C

2

I

G

C

2

O

C

H

2

I

C

H

2

O

C

H

1

O

C

H

1

I

G

C

1

O

G

C

1

I

R

R

C

V

S

S

P

M

U

T

E

I

IS

E

T

V

R

E

G

W

D

C

K

S

M

D

P

S

M

O

N

SMEF

FLB

FS3

FGD

LOCK

TRCNT

ISTAT

ASY

EFM

VSSA

MCK

MDATA

MLT

RESET

MIRROR

FOK

D

V

E

E

F

E

B

IA

S

T

G

2

T

G

U

F

D

F

C

T

F

E

1

F

E

2

T

D

F

C

T

D

V

D

D

L

P

F

T

T

E

1

T

E

2

T

Z

C

A

T

S

C

T

E

O

T

E

-

F

E

O

F

E

-

S

P

D

L

O

S

P

D

L

-

S

L

-

S

L

O

S

L

+

S

S

T

O

P

GND

EI

EQC

RFI

EQO

IRF

RFO

RF-

VCC

VR

LD

PD

E

F

PD2

PD1

20