Photodetector device, solid-state imaging device, and camera...

Details Photodetector device, solid-state imaging device, and camera... Photodetector device, solid-state imaging device, and camera...

2004-12-23

2008-05-06

Warren, Matthew E. (Department: 2815)

Active solid-state devices (e.g., transistors, solid-state diode

Field effect device

Having insulated electrode

C257S291000, C257S293000, C257S443000, C257S461000, C257SE27133

Reexamination Certificate

active

07368773

ABSTRACT:
A photodetector device is provided which comprises a photodiode for generating an electrical signal corresponding to an amount of incident light, and a logarithmic conversion transistor for subjecting a voltage value of the electrical signal to logarithmic conversion. The logarithmic conversion transistor comprises a first electrode which is one of a source electrode and a drain electrode, a second electrode which is the other of the source electrode and the drain electrode, and a gate electrode. The first electrode is connected to the photodiode. A first voltage is applied to the second electrode so that the logarithmic conversion transistor operates in a subthreshold region. The photodetector device further comprising a section for causing a voltage of the gate electrode to be in a floating state when the logarithmic conversion transistor subjects the voltage value of the electrical signal to logarithmic conversion.

REFERENCES:
patent: 5363000 (1994-11-01), Miyatake et al.
patent: 7009649 (2006-03-01), Watanabe
patent: 2001-245214 (2001-09-01), None
patent: 2003-158683 (2003-05-01), None

Affiliated with

Also associated with

Rating

Photodetector device, solid-state imaging device, and camera... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photodetector device, solid-state imaging device, and camera..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photodetector device, solid-state imaging device, and camera... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3985946