Digital pixel sensor with clock count output and operating...

Details Digital pixel sensor with clock count output and operating... Digital pixel sensor with clock count output and operating...

2007-01-16

2007-01-16

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C327S514000, C341S155000

Reexamination Certificate

active

11145026

ABSTRACT:
A digital pixel sensor, comprising a first switch coupled between a first voltage and a first node, turned on or off by a rest signal to provide a first voltage to the first node when turned on; a light sensing unit coupled to the first node generating a transformation current responsive to the intensity of an incident light source and thereby discharging the first node, and a decision device coupled with the first node and a reference signal to output an intensity reference signal corresponding to the intensity of the incident light source when the voltage at the first node is discharged to a level below that of the reference signal.

REFERENCES:
patent: 5565915 (1996-10-01), Kindo et al.
patent: 6377303 (2002-04-01), O'Connor
patent: 6525304 (2003-02-01), Merrill et al.
patent: 6642503 (2003-11-01), Kummaraguntla et al.
patent: 6704046 (2004-03-01), Dyas et al.
patent: 2003/0076432 (2003-04-01), Luo et al.

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