Ca2 Circuit Description; Circuit Description - Epson PhotoPC 850Z Service Manual

EPSON PhotoPC 850Z

2.2.2 CA2 Circuit Description

2.2.2.1 Circuit Description

DIGITAL CLAMP
The optical black section of the CCD extracts the average values from the
subsequent data to make the black level of the CCD output data uniform for
each line.
Operating Principles
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Figure 2-8. CA2 Circuit Block Diagram
Operating Principles of Circuit Boards
The optical black section of the CCD averaged value for each line is taken as
the sum of the value for the previous line multiplied by the coefficient k and the
value for the current line multiplied by the coefficient 1-k.
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Revision A
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