cxa2555q Sony Electronics, cxa2555q Datasheet - Page 16

• Manufacturer Part Number: cxa2555q
• Description: Rf Amplifier For Cd Player/cd-rom
• Manufacturer: Sony Electronics

Center Error Amplifier
The input signal is operational amplified by the center error amplifier and center drive amplifier after passing
via the input resistor and then it is output to Pin 11.
Tracking Error Amplifier
The signal current from the photodiode F is I-V converted and input to Pin 6 via the input resistor. The signal
current from the photodiode E is I-V converted and input to Pin 5 after its gain is adjusted by the volume.
These signals undergo operational amplification at the tracking error amplifier, VCA and tracking drive
amplifier and they are output to Pin 13.
The low frequency component of the CE output voltage is as follows:
The low frequency component of the TE output voltage is as follows:
V
CE
V
TE
=
= 10
=
= 11.1
100k
10k
112k
44k
Vin
(F – E)
20k
20k
73.4k
320k
Vin
Vin
(F – E)
I-V
I-V
100k
10k
100k
62k
112k
44k
Vc
CE IN
CE1
TE1
E
F
10
9
(TEC voltage = 1/2 VC)
6
5
8
23k
Vc
– 16 –
VCA
47k
12
TE C
20k
10k
73.4k
Vc
Vc
14p
20k
320k
2p
11
13
CE
TE
CXA2555Q