Photo-detector apparatus for a reading apparatus and producing m

Details Photo-detector apparatus for a reading apparatus and producing m Photo-detector apparatus for a reading apparatus and producing m

1986-12-18

1988-04-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

357 30, H01L 2714, H01L 3100

Patent

active

047407107

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: 3504114 (1970-03-01), Irwin et al.
patent: 3969751 (1976-07-01), Drukaroff et al.
patent: 4441791 (1984-04-01), Hornbeck
patent: 4458260 (1984-07-01), McIntyre

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