TC211

192-

× 165-PIXEL CCD IMAGE SENSOR

SOCS008B – JANUARY 1990

2-3

POST OFFICE BOX 655303

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.

Clocked

Phase

(image-

area

gate)

Virtual

Phase

Virtual

Phase

Virtual

Phase

Antiblooming Gate

Barriers

Potential

Wells

Vertical 16

µm

Horizontal

13.75

µm

Channel Stop

Representative

Top View of Pixels

1 Pixel

Cross Section

of Pixels

Etched Polysilicon

Insulating Oxide

Silicon

Cross Section

of Potentials

in Silicon

IAG Low

ABG Low

ABG Intermediate

IAG High

ABG High

Direction of Vertical Charge Transfer

Clocked

Phase

(image-

area

gate)

Clocked

Phase

(image-

area

gate)

Figure 1. Charge Accumulation and Transfer Process