Photoelectric converter with phototransistor and refresh means

Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means

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357 32, 357 58, 357 34, 357 2, 2502081, H01L 2714

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active

051287358

ABSTRACT:
A photoelectric converter comprising a photosensor element, a typical example of the photosensor element comprising: a transistor including an n or n.sup.+ collector region an n.sup.- region disposed contiguous to the collector region, a p base region disposed contiguous to the n.sup.- region an n.sup.+ emitter region disposed contiguous to the base region, and a first electrode connected to the emitter region; and a storage capacitor constituted by the base region, an electrically insulating region disposed contiguous to the base region, and a second electrode connected to the electrically insulting region; whereby the base region is held in a floating state. A photogenerated charge is stored in the base region by controlling the potential of the base region and an electric signal corresponding to the charge stored in the base region is subsequently output from the first electrode.

REFERENCES:
patent: 3624428 (1971-11-01), Weimer
patent: 3838439 (1974-09-01), Biard
patent: 3919469 (1975-11-01), Wasperkovitz
patent: 4072975 (1978-02-01), Ishitani
patent: 4425574 (1984-01-01), Silvestri et al.
patent: 4624428 (1971-11-01), Weimer et al.
patent: 4649409 (1987-03-01), Roppongi et al.
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patent: 4791469 (1988-12-01), Ohmi et al.
patent: 4916512 (1990-04-01), Ohmi et al.
Nishizawa et al., "Static Induction Transistor Image Sensors," IEEE Transactions on Electron Devices, vol. ED-26, No. 12, Dec. 1979, pp. 1970-1977.
Tadahiro Ohmi, et al., "Static Induction Transistor and its Application to Imaging Devices", Television Society of Japan, Technical Report, ED590, pp. 53-58, Aug. 28, 1981, (with English translation).

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