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參數(shù)資料
| 型號： | KB9223 |
| 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)： | 27/34頁 |
| 文件大?。?/td> | 614K |
| 代理商： | KB9223 |
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PRELIMINARY
RF AMP & SERVO SIGNAL PROCESSOR
27
KB9223 / KB9223-L
M/M-97-P006
1997. 10. 17
3.2.1 Focus Control($0X)
This command consists of 8 bits data and expressed by two hexa $0X.
FS4,FS3,FS2,FS1:internal switch for focus control
-Focus Search Operation(FS2,FS1)
$02:FS2 switch become off and the value of servo output pin is as below.
(10uA-5uA)*50k*(feedback Resistor/50k)
$03:If FS1 switch is 1, the current supply is cut off and the discharge is performed.
The waveform is as below and the time constant is determined by internal resistor 50K
and external capacitor.
Figure 20. Waveform at pin 3 when FS1 is switched from 0 to 1
The waveform of servo output pin according to FS1 and FS2 switches is as below.
Figure 21. Focus search waveform at pin 48 by $02 and $03
FS4 is switch for on/off control of focus servo loop
$00:Focus servo off
$08:Focus servo on
D7
D6
D5
D4
D3
D2
D1
D0
ISTAT
0
0
0
0
FS4
FS3
FS2
FS1
FZC
0V
$00
02
03
02
03
02
03
00
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