Analog Image Processing - Canon iR105 Service Manual

3.5 Analog Image Processing

Analog image processing is performed by the CCD/AP PCB, and it mainly consists of the
following:
• CCD drive
• CCD output gain correction, offset correction
• CCD output A/D conversion
CCD
[2]
Analog image
signal
Analog signal
[4] [3]
processing block
• Gain correction
• Offset correction
Analog signal
processing block
• Gain correction
• Offset correction
CCD/AP PCB
[1] 1st half even-numbered pixel analog image signal
[2] 1st half odd-numbered pixel analog image signal
[3] 2nd half even-numbered pixel analog image signal
[4] 2nd half odd-numbered pixel analog image signal
[5] 1st half even-numbered pixel digital image signal
[6] 1st half odd-numbered pixel digital image signal
[7] 2nd half even-numbered pixel digital image signal
[8] 2nd half odd-numbered pixel digital image signal
COPYRIGHT© 2001 CANON INC.
[1]
CCD drive
control
[1]
A/D
conversion
[2]
A/D
conversion
[3]
A/D
conversion
[4] A/D
conversion
F02-305-01
2000 2000 2000 2000 CANON iR105 REV.0 JULY 2001
CHAPTER 2 NEW FUNCTIONS
J1501
A12V
A5V
J1502
CCD control signal
Gain/offset
correction data
J1102
J1107
Reader
controller
PCB
[5]
10bit
[6]
10
[7]
10
[8]
10
2-41