FT18 Philips Semiconductors, FT18 Datasheet - Page 7

• Manufacturer Part Number: FT18
• Description: Frame Transfer CCD Image Sensor
• Manufacturer: Philips Semiconductors

Philips Semiconductors
2000 January
Frame Transfer CCD Image Sensor
Frame Timing
Frame Shift Timing
SSC
BLC
CR
PB
CB
A1
A2
A3
A4
B1
B2
B3
B4
line no.
internal
counter
video
LINE
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
A1
A2
A3
A4
B1
B2
B3
B4
Tp=1/(36MHz) = 27.8ns
1109 1110 1111 1112 1113 1114 1115 1116
1024 D
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
Charge Pump (CP): a measure to reduce dark current due to interface states.
Hustle: moving the charge packets of one line from storage to the output register.
D
B
For details see figure 3 "Line and pixel timing diagrams".
Linetime: the C-clocks shift charge packets one-by-one to the selected output buffer.
B
For details see figure 3 "Line and pixel timing diagrams".
BLC BLC B
For details see figure 3 "Line and pixel timing diagrams".
Black-Level Clamp (BLC): the video processing clamps the black lines to determine its output zero-level.
1
1
......
1119 1120 1121 1122 ...... 1250
B
48 Tp
D
2
2
D
Figure 4 - Frame timing diagrams
E
for all A and B clocks,
750kHz
duty cycle = 5/8
30Tp
1
CR before nominal integration
......
18Tp
26
7
Frame Transfer (FT):
27
......
70
71
E
charge image (all lines) is moved from image to storage
by the image and storage clocks together (see Figure "Frame Shift Timing").
72
E
73
E
74
E
By adding one CR-pulse during the horizontal blanking,
the effective integration time is decreased: "electronic shuttering"
75
B
76
B
1047
1047
BLC BLC B
77
78
79
1048
1048
80
B
81
D
82
D
83
C
Product specification
......
86
C
FT 18
87
1
88
2