CXA2570 View Datasheet(PDF) - Sony Semiconductor

Part Name

Description

View to exact match

CXA2570

RF Matrix Amplifier

Sony Semiconductor 

CXA2570N

• 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 adjustment (external resistance)

functions.

VC

R (ofst)

100k

ROM RW

A6

C8

B7

D9

50k

200k

ROM

30k 50k

200k RW

FEI 15

50k

VC

14 FE

FE = Gain {(B + D) – (A + C)}

Low-frequency gain

ROM: 16dB

RW: 28dB

Cut-off frequency fc (typ.) ROM: 400kHz

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, low-frequency gain adjustment and offset adjustment (external resistance)

functions.

10k

E

10

27k 373k

RW

10k

F

RW

11

ROM

27k

ROM

16 TE

TE = Gain (F – E)

Low-frequency gain

fc (typ.)

ROM: 20dB

RW: 32dB

ROM: 1MHz

RW: 250kHz

373k

VC

• VC Buffer

This outputs the VC ((1/2) VCC) voltage.

The maximum output current is approximately ±3mA.

VCC

VCC

25

40k

22

40k

– 13 –

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