CXA2568M
Tracking Error Amplifier
Each signal current from the photodiodes E and F is I-V converted and input to Pins 10 and 11 via an input
resistor which determines the gain. The signal is amplified by the gain amplifier, operated by the tracking error
amplifier and then the (F-E) signal is output to Pin 13.
Pin 23 can be used as a bias for LC when connected to VCC and as a bias for PD IC when left open.
VC
F
I-V
10
150k
820k
E
820k
I-V
11
150k
VC
GND
260k
12p
260k
12p
26k
VC
13k 23.8k
158.45k
23.8k
TRACKING
ERROR AMP
26k VC
13k
158.45k
VC
LC/PD
23
TE
13
TEOUT
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