Method and apparatus providing configurable current source...

Details Method and apparatus providing configurable current source... Method and apparatus providing configurable current source...

2008-03-18

2008-03-18

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S2140RC

Reexamination Certificate

active

07345269

ABSTRACT:
A configurable current source for imager readout system that can be operated as a simple-current-source or as a cascode-current-source. The configurable current source can be operated in a simple-current-source mode during circumstances when a low power supply voltage or large output signal swing is needed to output a pixel signal. The configurable current source can also be operated in a cascode-current-source mode for reduced nonlinearity and column-wise fixed pattern noise when power from a power supply is not a limitation. The configurable current source provides design flexibility and pixel optimization for imager development.

REFERENCES:
patent: 5353252 (1994-10-01), Hashimoto
patent: 7023031 (2006-04-01), Tsai

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