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參數(shù)資料
| 型號： | S1L9223B02 |
| 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)： | 21/36頁 |
| 文件大小： | 971K |
| 代理商： | S1L9223B02 |
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RF AMP & SERVO SIGNAL PROCESSOR
S1L9223B01
21
EFM COMPARATOR
The EFM comparator converts a RF signal into a binary signal.
Because the asymmetry generated due to variations in disc manufacturing can not be eliminated by the AC
coupling alone, this circuit uses to control reference voltage of EFM comparator for eliminating asymmetry.
Figure 6. EFM Comparator & Asymmetry Circuit
DEFECT CIRCUIT
The RFO signal bottom, after being inverted, is held with two time constants of long and short.
The short time-constant bottom hold is done for a disc mirror defect more than 0.1msec, the long time-constant
bottom hold is done with the mirror level prior to the defect. By differentiating this with a capacitor coupling and
shifting the level, both signals are compared to generate the mirror defect detection signal.
Figure 7. Defect Circuit
77
33
RFI
32
-
+
ASY
EFM
-
+
-
+
40K
19K
100K
100K
20K
85K
74
RFO
41
-
+
SSTOP/DFCT
2
BOTTOM
HOLD
5
-
+
4
DCC1
DCC2
DCB
75K
37.5K
28K
75K
VC+0.6254V
43K
DFCT
BOTTOM
HOLD
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| S1L9225X01-Q0R0 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:RF AMP & SERVO SIGNAL PROCESSOR |
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