Photosensitive device with low power consumption

Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Charge transfer device

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C257S292000, C257S432000, C257S444000, C257S462000

Reexamination Certificate

active

07075130

ABSTRACT:
A photosensitive device with a photodiode and an amplifier is disclosed. The diode is in series with a feedback transistor which forces the voltage derived from the photocurrent to be a logarithmic function of the light intensity. A current mirror is provided which controls the bias current to the amplifier to be proportional to the photocurrent. This arrangement ensures that the amplifier, just as the voltage derived from the photocurrent, becomes faster with increasing light intensity and therefore prevents an unnecessarily high power consumption at low light intensities.

REFERENCES:
patent: 5376813 (1994-12-01), Delbruck et al.
patent: 6528777 (2003-03-01), Ames et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Photosensitive device with low power consumption does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photosensitive device with low power consumption, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photosensitive device with low power consumption will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3569938

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.