– 4 –
Fig. 1-3. IC901 Block Diagram
3. IC905 (H Driver) and IC901 (V Driver)
An H driver and V driver are necessary in order to generate
the clocks (vertical transfer clock, horizontal transfer clock and
electronic shutter clock) which driver the CCD. IC901 is a V
driver, and the XV1-XV15 signals which are output from IC101
are the vertical transfer clocks, and the XSG signal which are
output is superimposed at IC901 in order to generate a ter-
nary pulse. In addition, the XSUB signal which is output from
IC101 is used as the sweep pulse for the electronic shutter. H
driver has inside IC905 and generate H1, H2, H3 and RG
clock at IC905.
4. IC905 (CDS, AGC Circuit and A/D Converter)
The video signal which is output from the CCD is input to pins
(25) of IC905. There are inside the sampling hold block, AGC
block and A/D converter block. Settings of sampling phase
and AGC amplifier is carried out by serial data of pins (32),
(33) and (34). The video signal is converted A/D converter,
and output to LVDS.
Fig. 1-4. IC905 Block Diagram
V11A-V15A,
V18A
V16A-V17A
V16B-V17B
POFD
VH16AX-
VH17AX
V1X-10X
V11X-V15X,
V18X
VH11AX-
VH15AX,
V18AX
V16X-V17X
VH16BX-
VH17BX
V1-V10
MIX
VL
GND
VL
GND
VH
MIX
VL
GND
VH
MIX
VL
GND
VH
VL
VH
OFDX
VH
VL
VDD GND
CCDINP
HL
H1 TO H4
HD
SDATA
SCK
SL
REFB
REFT
PRECISION
TIMING
GENERATOR
TG CORE
VGA
12-BIT
ADC
6~42 dB
VREF
CLAMP
INTERNAL
REGISTERS
INTERNAL
CLOCKS
CDS
HORIZONTAL
DRIVERS
4
ADDI7000
-3, 0, +3, +6dB
VD
CLI
RG
GP01
3V INPUT
1.8V OUTPUT
LDO
REG
GP02
TCLKP
REDUCED
RANGE
LVDS
OUTPUT
TCLKN
DOUT0P
DOUT0N
DOUT1P
DOUT1N
CCDINM
