cxa2571n Sony Electronics, cxa2571n Datasheet - Page 15

• Manufacturer Part Number: cxa2571n
• Description: Rf Matrix Amplifier
• Manufacturer: Sony Electronics

• 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, low-frequency gain adjustment and offset addition functions.
• 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.
• VC Buffer
This outputs the VC ((1/2) V
The maximum output current is approximately ±3mA.
Use this voltage as the analog system VC voltage.
28
10k
10k
25k
10
11
E
F
373k
27k
FE = Gain { (B + D) – (A + C) }
Low-frequency gain
Cut-off frequency fc (typ.)
RW
RW
VC
VOFST
387k
CC
V
27k
CC
ROM
) voltage.
40k
40k
ROM
ROM
RW
C
D
A
B
373k
6
8
7
9
200k
30k
ROM
50k
50k
ROM: 16dB
RW: 28dB
ROM: 400kHz
RW: 300kHz
20
VC
50k
TE
200k
RW
200k
– 15 –
• DVC Buffer
This outputs the 1/2 DV
The maximum output current is approximately ±3mA.
Use this voltage as the digital system DC voltage.
The output DC voltage of each system is level shifted
using the DVC voltage as the reference.
ROM
RW
TE = Gain (F – E)
Low-frequency gain ROM: 20dB
fc (typ.)
17
50k
25k
FEI
DVC
19
CC
RW: 32dB
ROM: 1MHz
RW: 250kHz
100k
voltage.
DV
CC
40k
40k
18
FE
CXA2571N