Name
Abstract | ||
|---|---|---|
In this paper, we present a 4T low-power linear output current-mediated CMOS APS imager, in which reset and read-out operations are carried-out simultaneously on two pixels of the same row. The proposed operating technique greatly simplifies the pixel architecture with only four transistors and two control signals required, while six transistors and four control lines are required by its current-mediated counterpart. The imager achieves fixed pattern noise (FPN) correction during pixel-readout and exhibits a power consumption which is independent of the imager array size, since only a single current source is solicited at any given time due to the array-level operating technique. A linearization circuit technique using the transistor's channel length modulation effect is employed enabling to double the linear range of the pixel's photon-to-output signal transfer function. Performance analysis and experimental results are presented for a 32 × 32 image sensor array prototype, fabricated using AMS 0.35-μm process. The pixel size is 6.5 × 6.5 μm2 with 22% fill-factor. The chip total power consumption is less than 1 mW, at 50 frames/s with a 3.3 V power supply. |
Year | DOI | Venue |
|---|---|---|
2011 | 10.1109/TVLSI.2010.2053054 | IEEE Transactions on Very Large Scale Integration (VLSI) Systems |
Keywords | Field | DocType |
pixel size,pixel-readout,linearization circuit technique,image sensor array,image sensor,pixel architecture,active pixel sensor,power consumption,v power supply,cmos image sensors,4t low-power cmos image sensor,transistor channel length modulation effect,array-level operating technique,voltage 3.3 v,cmos aps imager,size 0.35 mum,low-power linear-output current-mediated cmos,current-mediated counterpart,integrated circuit noise,photon-to-output signal transfer function,low-power image sensor,proposed operating technique,current-mediated pixel,fixed pattern noise correction,imager array size,linearization technique,linear-output cmos image sensor,chip total power consumption,transfer function,pixel,image sensors,chip,optical modulator,transfer functions,cmos image sensor,sensor array | Fixed-pattern noise,Image sensor,Current source,Computer science,Channel length modulation,Electronic engineering,CMOS sensor,CMOS,Pixel,Electrical engineering,Signal transfer function | Journal |
Volume | Issue | ISSN |
19 | 9 | 1063-8210 |
Citations | PageRank | References |
0 | 0.34 | 5 |
Authors | ||
2 | ||