Epson FILMSCAN 200, Руководство по обслуживанию

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OPERATING PRINCIPLES
Rev. A
2-3
2.1.1.2 Transmission Section
This section receives the signal charge from the photo-sensitive section and transfers it to the output
section. The transmission section contains two capacitors for each photo-diode in the photo-sensitive
section. Refer to Figure 2-5.
2.1.1.3 Output Section
The output section receives signal charges from the transmission section and sends them out of the unit
(i.e., to the main board). The section must receive a reset signal from the main board after outputting the
signal for each pixel.
Output
Section
ϕ
1
ϕ 2
The diagram at left is a simple illustration of the
transmission section. f1 and f2 are transmission
pulses. The photoelectrically converted
signal charges are stored in the capacitors.
When transmission pulse f2 goes ON, signal
charges move to the capacitor at their right.
The charge that exists in the right-most capacitor
is transmitted to the output section and then to
the main board.
When transmission pulse f2 goes OFF, the
condition of the section becomes stable.
When transmission pulse f1 goes ON, charges
again move to the capacitor at their right.
When transmission pulse f1 goes OFF, the
condition of the section again becomes stable.
By continual repetition of these operations,
signal charges for all pixels are transmitted
to the output section.
Figure 2-5. Transmission Section Operation