S5L1454A 查看數據表（PDF） - Samsung

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S5L1454A

DVD PLAYER DIGITAL SERVO & DSP IC

Samsung 

DVD PLAYER DIGITAL SERVO & DSP IC

S5L1454A

sampling rage = fs +

+

X

K0

K

D

Y

Average Value Filter Configuration

TIMING DIAGRAM (For example: When LD on & LENS down)

FOKB

FOD LD on

FE

SENSE

down

tOFa

¢º¢º FOCUS/TRACKING INPUT GAIN ADJUSTMENT

Summary

The object of the focus/tracking input gain adjustment is to select the appropriate input gain using H/W before

sampling, according to the size of the FE and TE signals input into the servo part. This allows you to use the

ADC's full input range and raises the quantized data's ability for decomposition.

 Input signal : FE, TE

 Output signal : FEin, TEin(internal signal) or FOD, TRD (external signal)

FE

(from RF)

INPUT GAIN

AMP

pin

x(-N)

fs

FE

+

+

FEin FOCUS LOOP

FILTER

FinG/TinG

Fofst Fbias

COMMAND

manual setting : DPRW(BC) cmd

Automatic control : focus → DDT (A1) cmd

tracking → TBA (B3) cmd

FOD

pin

23

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