Original reading device

Details Original reading device Original reading device

1983-01-18

1985-10-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

358213, H01J 4014

Patent

active

045490880

ABSTRACT:
An original reading device including a light-receiving element composed of a substrate having in sequence a plurality of underlying electrodes, a photoconductor and a transparent conductive overlying electrode. A signal from the light-receiving element is read by applying a bias voltage to one of the two electrodes and switching the other electrode with an MOS transistor. The potential of the substrate of the MOS transistor is made equal to or lower than a potential corresponding to the negative value of the bias voltage if the MOS transistor is an n-channel MOS transistor, and the substrate potential is made equal to or higher than a potential corresponding to the positive value of the bias voltage if the MOS transistor is a p-channel MOS transistor.

REFERENCES:
patent: 4291337 (1981-09-01), Takamura et al.
patent: 4354104 (1982-10-01), Chikamura et al.
patent: 4388532 (1983-06-01), Garcia
patent: 4462047 (1984-07-01), Fujimoto et al.

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