cxa1782cq Sony Electronics, cxa1782cq Datasheet - Page 15
cxa1782cq
Manufacturer Part Number
cxa1782cq
Description
Rf Signal Processing Servo Amplifier For Cd Players
Manufacturer
Sony Electronics
Datasheet
1.CXA1782CQ.pdf
(31 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
CXA1782CQ
Manufacturer:
SONY
Quantity:
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Part Number:
CXA1782CQ
Manufacturer:
SONY/索尼
Quantity:
20 000
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.
The CXA1782 tracking block has built-in circuits for balance and gain adjustments to enable software-based
automatic adjustment.
The balance adjustment is performed by varying the combined resistance value of the T-configured feedback
resistance at E I-V AMP.
Vary the value of R
For the gain adjustment, the TE AMP output is resistance-divided by the gain adjustment switches (TOG1 to
TOG3), and it is output at Pin 42.
These balance and gain adjustment switches are controlled through software commands.
F I-V AMP feedback resistance = R
E I-V AMP feedback resistance = R
1k
3.3µ
E3
in the formula above by using the balance adjustment switches (BAL1 to BAL3).
iF
iE
E
F
38
39
VC
VC
F I-V AMP
E I-V AMP
260k
260k
R
R
12p
12p
F1
E1
VF
VE
40
VC
EI
F1
E1
+ R
+ R
– 15 –
VC
F2
E2
30k
30k
+
+
R
R
F1
E1
VC
R
R
TE AMP
x R
x R
F3
E3
96k
F2
E2
= 403k
VC
42
TEO
CXA1782CQ/CR