Miscellaneous active electrical nonlinear devices – circuits – and – Specific input to output function – Logarithmic
Patent
1993-02-03
1994-11-08
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific input to output function
Logarithmic
327514, 327515, H03K 501, G06F 7556
Patent
active
053630009
ABSTRACT:
In an image sensing device, a photodiode is connected to a drain of a MOS transistor. The drain is connected to a gate of the MOS transistor via a resistor. The MOS transistor operates in a subthreshold region to output a signal being logarithmically proportional to the intensity of incident light to the photodiode.
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Ishida Kouichi
Miyatake Shigehiro
Sameshima Kouichi
Takada Kenji
Callahan Timothy P.
Minolta Co. , Ltd.
Riley Shawn
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