PI214MC-DR Datasheet, PDF (3/8 Pages) AMI SEMICONDUCTOR – 200DPI CIS Two Level Digital Output Module

DOCUMENT SURFACE
LIGHT PATH
GLASS WINDOW
LED ^BAR
PCB
SENSORS
INSIDE PICTORIAL OF MODULE
FIGURE 2.
I/O to the module is a 2 X 2 mm 16-pin Unshrouded Connector (See I/O pin
assignment, under Specifications) located on one end of the module (see module
drawing).
Circuit Description and Operation
See Figure 3, a simplified block diagram of the analog tracking digitizer. Fundamentally,
the tracking digitizer transforms the signal output from a CIS module existing on the
IMAGE
PIXELS
FROM
THE
CIS
REFERENCE
LEVEL
GENERATOR
COMPARATOR
TWO
LEVEL
DIGITAL
OUTPUT
ANALOG SIGNAL REFERENCE
GENERATOR AND A SINGLE
BIT COMPARATOR
FIGURE 3.
market today. It takes the analog signal from the CIS section of PI214MC-DR and
derives a tracking background reference signal. Then this reference is compared
against the output signals from the CIS section. The resulting signal from comparison
produces a two-level digital signal that is high when the pixel signal is brighter than the
background and remains at zero as long as the signal is darker than the background
signal.
Page 3 of 8 PI214MC-DR, 11/29/99