Table of Contents
Advertisement
Circuit Descriptions
5-2 RF
5-2-1 RIC1 (KS1461)
KS1461 is combined with KS1452 and KS1453 as bipolar IC developed for DVD SERVO system.
Main features include DVD waveform equalizing, CD waveform equalizing, focus error signal generation, 3-beam
tracking error signal generation, DPD 1-beam tracking error, defect, envelope, MIRR output, etc. after receiving the
pick-up output converted into I/V.
5-2-1 (a) Basic Potentiometer
KS1461 uses a single power method and each circuit is based on V of 2.5V.
V (Pin 12, 20, 24, 67) terminal is needed for IC, which uses the peripheral V.
5-2-1(b) RF signal
Fig. 5-11 shows the flow of signal generated by the pick-up.
A, B, C, D signals detected from pick-up are converted in to RF signal(A+B+C+D) via RF summing AMP.
PICK-UP
PD
LD
F
E
Fig. 5-12 shows the waveform-equalizing block diagram for the RF signal.
It outputs to EQout (Pin 86) terminal by initially changing switching AMP gain of DVD and CD, and then adjust-
ing the level in RF SUM & AGC. It controls RF SUM & AGC gain by means of Pin 89-95 and interfaces with PWM
signal, (output from PWM terminal of KS1453, via low-pass filter to adjust boost gain and peak frequency.
EQout terminal is connected with EQin (Pin 86).
5-6
104
%
A
104
^
B
104
&
C
104
*
D
3
4
5
6
7
8
w
E
RFAGCO
?
RE SUM
& AGC
DPD
TE
TE
ABCD
SUM
FE
ALPC
Fig. 5-11
104
474
MIRRI
EQIN
.
m
MIRR
RF EG
TESEL
Mhx
ENV
FOK
DEFECT
G
MIRR
,
RFEQO
y
TE
ABCDI
i
103
I
ABCD
P
ENV
[
FOKB
F
DFCT2
d
DFCT1
T
FE
Samsung Electronics
Advertisement
Chapters
Table of Contents
