參數(shù)資料
型號(hào)： 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)： 24/36頁
文件大?。?/td> 971K
代理商： S1L9223B02
S1L9223B01
RF AMP & SERVO SIGNAL PROCESSOR
24
SERVO BLOCK
FOCUS SERVO BLOCK
When defect is "H" (the defect signal is detected), the focus servo loop is muting in case of focus phase
compensation. At this time, the focus error signal is output through the low pass filter formed by connecting a
capacitor (0.1
μ
F) and a built-in 470K
resistor to the FDFCT pin (pin 60). Accordingly, the focus error output is held
at the error value just before defect error during defect occurring. The peak frequency of focus loop phase
compensation is at about 1.2KHz when the resistor connected to FSET pin (pin 6) is 510K
, and it is inversely
proportional to the resistor connected to the FSET pin. While the focus search is operating, the FS4 switch is on
and then the focus error signal is isolated, accordingly the focus search signal is output by FEO pin (pin 48). When
the FS2 switch is on (focus on), the focus servo loop is on and the focus error signal from FE2 pin (pin 58) is output
through the focus servo loop.
Figure 12. Focus Servo Block
58
-
+
60
28
27
Focus Phase
Compensation
26
47
-
+
-
+
-
+
-
+
3
3.6K
60K
FZCI
FE2
470K
DFCTI
20K
48K
FS4B
130K
FGD
FS3
46K
580K
FS3
4
40K
FS2B
FLB
FRCH
50K
10K
3.6K
FS1
92K
40K
FE-
FEO
VC
FSCMPO
48
FDFCT
PS
4 3
X1
X2
X3
X4
0 0
0 1
1 0
1 1
6
FSET
X1
X2
X3
X4
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