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參數(shù)資料
| 型號： | S1L9223B02-T0R0 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | RF AMP & SERVO SIGNAL PROCESSOR |
| 中文描述： | 射頻放大器 |
| 文件頁數(shù)： | 25/36頁 |
| 文件大小： | 971K |
| 代理商： | S1L9223B02-T0R0 |
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RF AMP & SERVO SIGNAL PROCESSOR
S1L9223B01
25
TRACKING SERVO BLOCK
During detection of defect, the tracking error signal is output through the tracking servo loop after passing the low
pass filter formed by connecting a capacitor (0.1
μ
F) and a built-in 470K
resistor to the TDFCT pin (pin57) in case
of tracking phase compensation. The value of tracking gain up/down can be controlled by TGU and TG2 pin. The
peak frequency of tracking loop phase compensation, the dynamic range and offset of OP AMP can be adjusted by
changing the value of resistor connected to FSET pin same as focus loop. In case of unstable status of actuator
after jumping, the ON/OFF of tracking loop is controlled by TM7 switch of break circuit.
After 10-track jumping, servo circuit gets out of the liner range and actuator's tracking becomes occasionally
unstable. Hence unnecessary jumping with many tracking error should be prevented.
Figure 13. Tracking Servo Block
-
+
53
57
61
62
TRACKING
PHASE
COMPENSATION
49
50
TE2
470K
TDFCT
680K
TGU
TG2
470K
20K
10K
110K
82K
680K
66PF
10K
90K
FSET
TE-
TG1
TG1
TM1
TG2
TM7
TM3
TM4
DFCTI
6
TEO
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