cxa1982q Sony Electronics, cxa1982q Datasheet - Page 15

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cxa1982q

Manufacturer Part Number
cxa1982q
Description
Rf Signal Processing Servo Amplifier For Cd Players
Manufacturer
Sony Electronics
Datasheet
Tracking Error Amplifier
The photo diode currents input to E and F pins are each current-voltage converted by the E I-V and F I-V
amplifiers.
Tracking system balance adjustment is performed by varying the resistance externally attached to EI pin.
This external resistance sets combined feed back resistance of the T-configured E I-V AMP.
Gain adjustment is performed by adjusting external variable resistor of TEO pin.
F I-V AMP feedback resistance = R
E I-V AMP feedback resistance = R
1k
3.3µ
iF
iE
E
F
39
38
VC
VC
F I-V AMP
E I-V AMP
260k
260k
12p
R
R
12p
F1
E1
VF
VE
R1
40
VC
EI
F1
E1
VC
+ R
+ R
– 15 –
F2
E2
30k
30k
+
+
R
R
F1
E1
VC
R
R
TE AMP
F3
x
R
R
96k
F2
E2
= 403k
(Rx = R1//R
E3
)
42
TEO
VC
CXA1982Q

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