TC210

192-

× 165-PIXEL CCD IMAGE SENSOR

SOCS009B – OCTOBER 1986 – REVISED MAY 1990

2-5

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.

Direction of Vertical Charge Transfer

ABG High

IAG Low

Low

ABG

Intermediate

ABG

1 Pixel

Antiblooming Gate

Barriers

Potential Wells

16

µm

Vertical

13.75

µm

Horizonal

IAG High

Representative

Top View of

Pixels

Virtual

Phase

Clocked

Phase

(image-

area

gate)

Virtual

Phase

Virtual

Phase

Channel Stop

Cross Section

of Pixels

Cross Section

of Potentials

in Silicon

Clocked

Phase

(image-

area

gate)

Clocked

Phase

(image-

area

gate)

Etched

Polysilicon

Insulating Oxide

Silicon

Figure 1. Charge Accumulation and Transfer Process