參數(shù)資料
型號: S1L9251X
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: CD-ROM 48X RF AMP
中文描述: 的CD - ROM 48倍速射頻放大器
文件頁數(shù): 17/25頁
文件大小: 200K
代理商: S1L9251X
CD-ROM 48X RF AMP
S1L9251X
17
AGC & EQ
— Input level of RF AMP signal is convert to ouput level selected by AGC block.
— It is discreminated that CD-ROM or CD-RW.
— AGC Amp is designed to work with the Wide Range PLL.
— Boost Control of the Summing Amp is possible using the EQ Control Switc
RFRP & RFCT Block & Envelope Detector
— This circuit generates RF
s amplitude signals by detecting the upper envelope, using Servo Control signals
for Focus Error signal balance adjustment.
— Capacitance connected to CE that decides the time-constant value.
— RFRP is a block for detecting signals crossing the Track.
— Using the AC-coupled ABCD signals, carries out Peak and Bottom hold operation.
Pick- UP
.Mode_SEL
.ABCD- ATT
RFEQO
AGCIN
AGC
CAGC
.AGCON/OFF
.AGC- LVL
.AGCIN_Z
LPF
PLLF LPFADJ
.GAIN_PLLF
.RFEQ_SEL
RFO
SUM
a
b
c
d
.PUP_SEL
.CAV_SEL
.EQG_CEN
.RFEQ_SEL
CM4
CM8
+
-
+
-
+
-
CLPFi
CLPF
+
-
vr
+
-
PEAK
- HOLD1
BOTTOM
- HOLD1
+
-
PEAK
- HOLD2
BOTTOM
- HOLD2
+
-
RFRPI
RFCT
RFRP
+
-
vcc
Voffset
vcc
vofst
dvc
1
dvc
1
A1
A2
A3
+
-
Peak
AGCIN
cp_env
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