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參數(shù)資料
| 型號： | S1L9223B01-Q0R0 |
| 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)： | 20/36頁 |
| 文件大?。?/td> | 971K |
| 代理商： | S1L9223B01-Q0R0 |
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S1L9223B01
RF AMP & SERVO SIGNAL PROCESSOR
20
FOCUS OK CIRCUIT
The FOK is the output. The focus OK circuit generates a timing window to enable focus servo operation from focus
search status. When the difference of the RFO (pin74) signal and DC coupled signal IRF (pin75) are above the
predefined voltage the Focus OK circuit output (pin40) becomes active (High output). The predefined voltage is -
0.39V
MIRROR CIRCUIT
IRF signal is amplified by the mirror amp, and the peak and bottom component of amplified signal are detected by
peak and bottom hold circuit. The peak hold circuit covers traverse signal of up to 100KHz component and bottom
hold circuit capable of covering the envelope frequency of disc rotation. The time constant for the mirror hold must
be sufficiently larger than that of the traverse signal.
Figure 5. Mirror Circuit
Figure 4. Focus OK Circuit
74
75
-
+
-
+
40
RFO
IRF
FOK
40K
40K
40K
57K
90K
VC+0.625V
75
-
+
1
IRF
Peak and
Bottom
Hold
-
+
39
-
+
-
+
17K
38K
19K
2.5K
96K
17K
1.5K
MIRROR
MCP
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