參數(shù)資料
型號: HA12188AF
廠商: Hitachi,Ltd.
英文描述: Pre-Amplifier and Servo IC for Quadruple-Speed CD-ROM
中文描述: 預(yù)放大器和四人間伺服集成電路高速的CD - ROM
文件頁數(shù): 18/35頁
文件大?。?/td> 248K
代理商: HA12188AF
HA12188AF
Rev.1, Oct. 1995, page 18 of 35
Table 5
BAL Values
D3
D2
D1
D0
BAL
Ratio
1
0
0
0
272k
–32%
1
0
0
1
288k
–28%
1
0
1
0
304k
–24%
1
0
1
1
320k
–20%
1
1
0
0
336k
–16%
1
1
0
1
352k
–12%
1
1
1
0
368k
–8%
1
1
1
1
384k
–4%
0
0
0
0
400k
±0%
0
0
0
1
416k
+4%
0
0
1
0
432k
+8%
0
0
1
1
448k
+12%
0
1
0
0
464k
+16%
0
1
0
1
480k
+20%
0
1
1
0
496k
+24%
0
1
1
1
512k
+28%
4. FOK Detector
This detector is a comparator that generates the FOK signal. FOK is one of the signals that determines
when to activate the focus servo. When the voltage at pin 38 exceeds the voltage at pin 34 by
approximately 0.4V, pin 32 goes high.
FOK
+
31
34
32
30 29
33
Defect
Mirror
0.033
μ
0.015
μ
0.015
μ
Unit C : F
Figure 8 Mirror, FOK, and Defect Detectors
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