Circuit Description
Input Processor
To process the B/W input signal, maximum
and minimum
values of the
input signal are controlled by calibrating
and
in the high state for the maximum
level, and setting them to earth for the minimum
level.
Processing to compensate for
shading
distortion is controlled with
‘low’ and
‘high’. For B/W mode,
should be
‘high, and
‘low’. For half-tone,
is
‘low’, and
is ‘high’.
External Circuits
. . . . . . . . . . . . . . . . . . ,
Shading RAM
Scanner Image
Processing
: E x t e r n a l
RAM :
Line Buffer
. RAM
Scanner
Figure
Scanner Interface Block Diagram
Driver
The
driver clock frequency is
A
duty cycle is used to lengthen the charging time. A
start signal is provided every
to match the
line scanning time. Actual image signal is
provided in less than
using the
clock and taking
paper size into consideration.
KHZ
C L O C K
1 LINE
Electronics
Содержание SF11OT
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