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參數(shù)資料
| 型號： | S1L9223B01-Q0R0 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | RF AMP & SERVO SIGNAL PROCESSOR |
| 中文描述： | 射頻放大器 |
| 文件頁數(shù)： | 18/36頁 |
| 文件大小： | 971K |
| 代理商： | S1L9223B01-Q0R0 |
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S1L9223B01
RF AMP & SERVO SIGNAL PROCESSOR
18
FUNCTIONAL DESCRIPTION
RF AMP BLOCK
RF AMPLIFIER
The optical currents input through pins PD1(A+C) and PD2(B+D) are converted into voltages through I-V amp, and
they are added to RF summing amp. The voltage, converted from the photo diode (A+B+C+D) signal, is output
through RFO (pin74) and the eye pattern can be checked at this pin.
FOCUS ERROR AMP
The output of the focus error amp is the difference between I-V amp(1) output VA and
RF I-V amp(2) output VB. The focus error bias voltage applied to the (+) of focus error amp can be changed by
output voltage of D/A converter as shown in diagram, so that the offset of focus error amp can be adjusted
automatically by controlling 5 bits counter switches. Focus error bias can be adjusted from the range of +100mV —
-100mV by connecting the resistor on pin 63 (FEBIAS).
Figure 1. RF Amplifier Circuit
65
66
-
+
-
+
74
-
+
73
PD1
PD2
RFO
RF-
58K
10K
VA
I-V amp(1)
VC
58K
10K
VB
I-V amp(2)
VC
VC
RF summing amp
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