TC211 Datasheet, PDF (3/13 Pages) Texas Instruments – 192- × 165-pixel ccd image sensor

TC211
192- × 165-PIXEL CCD IMAGE SENSOR
SOCS008B – JANUARY 1990
functional description (continued)
Each clock pulse applied to the image area gate causes an automatic fast clear of the 192 image pixels and
12 dark pixels of the serial register before the next image line is transferred into the serial register. (Note that
the six dummy pixels at the front of the serial register, which are used to transport charge packets from the serial
register to the amplifier input, are not cleared by the image area gate clock.) The automatic fast-clear feature
can be used to initialize the image area by transferring all 165 image lines to the serial register gate under dark
conditions without clocking the serial register gate.
Antiblooming Gate
Barriers
Potential
Wells
Vertical 16 µm
Representative
Top View of Pixels
Cross Section
of Pixels
Horizontal
13.75 µm
Channel Stop
Virtual
Phase
Clocked
Phase
(image-
area
gate)
Virtual
Phase
Clocked
Phase
(image-
area
gate)
Virtual
Phase
Clocked
Phase
(image-
area
gate)
Etched Polysilicon
Insulating Oxide
Silicon
1 Pixel
IAG Low
ABG Low
ABG Intermediate
Cross Section
of Potentials
in Silicon
IAG High
ABG High
Direction of Vertical Charge Transfer
Figure 1. Charge Accumulation and Transfer Process
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