參數(shù)資料
型號(hào): 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(yè)數(shù): 23/35頁(yè)
文件大?。?/td> 248K
代理商: HA12188AF
HA12188AF
Rev.1, Oct. 1995, page 23 of 35
G
50
40
30
20
10
0
10
100k
100
1k
2k
4k
10k
Frequency (Hz)
P
180
108
0
108
180
Phase
Gain
Note:
Peak frequency of phase compensation is inversely proportional to external resistance value
(330k
at this figure) of pin 13, 14. (dot line : $40 mode, solid line : $42 mode)
Figure 16 Tracking Servo Frequency Characteristic (pin 11, 12 are open)
The transform function of phase compen block at figure 15 is as follows.
VOUT
VIN
4.47
1+j
ω
1+j
ω
7.9
×
10
9
I
5.6
×
10
10
I
)
tan
-1
ω
(
(
)
)
tan
-1
ω
7.9
×
10
9
I
(
5.6
×
10
10
I
(
)
at TPS OFF
at TPS ON
V
CC
0.71V
I
13
or I
14
External resistance value of pin 13 or 14
I = I
13
I = 2.7 I
14
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