S5L1454A 查看數據表（PDF） - Samsung
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S5L1454A Datasheet PDF : 161 Pages
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S5L1454A
DVD PLAYER DIGITAL SERVO & DSP IC
Fbias
RFENV
-dX/2
FBpd
+dX
-dX/4
FBok
= dX/4
(end)
t
1 2 3 4 5 6 7 8 9 10 11 = 9
¢º¢º FOCUS/TRACKING LOOP GAIN CONTROL
Summary
The loop filter's output gain is automatically adjusted so that the focus/tracking open loop bandwidth is at the
specific frequency needed by the system.
nsk
Adjust
Gain
(open loop)
Input signal : FE, TE
Output signal: FOD, TRD
Initial
Static fc
freq.
Adjust
Must Goal
FE/TE
pin
(from RF)
XinG
SINE
(fc)
FOCUS/TRACKING
LOOP FILTER
x(-N)
fs
XEin
+
+
pin FOD
*nsk
TRD
* X means F(focus) &
XiG
Xofst
Xwave
(fc)
XGA PHASE
T(tracking)
+
BPF
ERR Peocessor
DTx
30
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