Reading apparatus with improved clarity

Details Reading apparatus with improved clarity Reading apparatus with improved clarity

1985-06-20

1988-01-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250578, H01J 4014

Patent

active

047193450

ABSTRACT:
A reading apparatus including a plurality of photodiodes each provided with a storage capacitor, the photodiodes adapted to store electric charge in the storage capacitor upon receiving light, a plurality of analog switches each connected in series with one end of each of the photodiodes, an element for leading out an amount of electric charge as a signal when the amount of electric charge is stored in the storage capacitor, a shift register for rendering the plurality of analog switches conductive successively in time sequence, wherein capacitance of the storage capacitor is larger than parasitic capacitance of the analog switch.

REFERENCES:
patent: 4149197 (1979-04-01), Kos et al.
patent: 4366503 (1982-12-01), Terakawa et al.
patent: 4445117 (1984-04-01), Gaalema et al.
patent: 4446364 (1984-05-01), Hayashi et al.
patent: 4511804 (1985-04-01), Ozawa

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