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CXA2581N Arkusz danych(PDF) 11 Page - Sony Corporation

Numer części CXA2581N
Szczegółowy opis  RF Signal Processor for CD Players
Download  22 Pages
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Producent  SONY [Sony Corporation]
Strona internetowa  http://www.sony.co.jp
Logo SONY - Sony Corporation

CXA2581N Arkusz danych(HTML) 11 Page - Sony Corporation

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CXA2581N
• Focus Error
The signals input to the A and C pins and the B and D pins are arithmetically amplified and the focus error
signal is output.
This circuit has RW/ROM switching and offset addition functions.
VC
RW
100k
23.5k
30k
ROM
A
DVC
VOFST
6
FEI 17
FE
16
30k
C 8
30k
B
30k
47k
200k
47k
50k
100k
200k
7
D
ROM
RW
ROM
RW
9
124
124
FE = Gain { (B + D) – (A + C) }
Low frequency gain
ROM: 16dB
RW: 28dB
Cut-off frequency fc (typ.) ROM: 300kHz
RW:
300kHz
• Tracking Error
The signals input to the E and F pins are arithmetically amplified and the tracking error signal is output.
This circuit has RW/ROM switching and offset addition functions.
DVCC
ROM
RW
10
18
DVC
F
VC
VOFST
ROM
RW
VC
E
TE
TE_BAL
11
gm
gm
19
20k
20k
20k
10k
10k
31.5k
125.5k
20k
63k
251k
63k
ROM
RW
251k
TE = Gain (F – E)
Low frequency gain
ROM: 16dB
RW:
28dB
TE balance adjustment
F – E low frequency gain = ±6dB
External resistance value vs. Low frequency gain
Resistance value [
Ω]
10k
22
16
12.5
20k
30k
Low frequency
gain [dB]


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