Photoelectric conversion apparatus

Details Photoelectric conversion apparatus Photoelectric conversion apparatus

2006-07-18

2006-07-18

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S214100, C250S2140LS, C257S290000, C327S514000

Reexamination Certificate

active

07078668

ABSTRACT:
A photoelectric conversion apparatus includes a photoelectric conversion element and a logarithmic conversion unit for converting a signal from the photoelectric conversion element to a logarithmically compressed voltage by means of a diode characteristic of p-n junction. The p-n junction in the logarithmic conversion unit is composed of any two terminals of the emitter, the base and the collector of the bipolar transistor, and a residual terminal of the transistor is connected to a semiconductor substrate.

REFERENCES:
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patent: 6147338 (2000-11-01), Takahashi
patent: 2002/0020845 (2002-02-01), Ogura et al.
patent: 2002/0067416 (2002-06-01), Yoneda et al.
patent: 2002/0113888 (2002-08-01), Sonoda et al.

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