TH7888A Datasheet, PDF (11/21 Pages) ATMEL Corporation – Area Array CCD Image Sensor (1024 x 1024 Pixels with Antiblooming)

Exposure Time
Reduction
TH7888A
The TH7888A provides an exposure time control (electronic shutter) function.
The exposure time reduction is achieved by pulsing all the ΦPi gates to 0 V to continu-
ously remove all the photogenerated electrons through antiblooming drain VA.
Figure 12. Timing Diagram for Electronic Shutter
Frame Period
2 µs
ΦA
Φ P1
1 µs
Φ P2
Φ P3
Φ P4
Transfer
Obturation
Integration
Note: To view fall and rise times see Figure 6 on page 7
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1999A–IMAGE–09/03