Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1998-12-10
2000-12-19
Ham, Seungsook
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
2502141, 257292, 348241, H04N 5335, H01L 2700
Patent
active
061630233
ABSTRACT:
An amplified photoelectric transducer of the present invention includes: a photoelectric transducer section for photoelectrically transducing incident light into an electric signal; a first MOS transistor for amplifying the electric signal; a second MOS transistor for resetting the photoelectric transducer section; and a third MOS transistor for reading out to a signal line the amplified electric signal. The photoelectric transducer section includes a signal charge storage section for storing a charge corresponding to the electric signal and a potential change detection section for detecting a potential change of the electric signal. The amplified photoelectric transducer further includes a fourth MOS transistor for switching the potential of the potential change detection section to a semiconductor substrate potential in response to an operation of the third MOS transistor.
REFERENCES:
patent: 5892540 (1999-04-01), Kozlowski et al.
Oba, Elji "A 1/4 Inch 330k Square Pixel Progressive Scan CMOS Active Pixel Image Sensor" 1997, IEEE International Solid-State Circuits Conference, Section 98372.
Conlin David G.
Ham Seungsook
Pyo Kevin
Sharp Kabushiki Kaisha
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