Low-noise in-pixel comparing active pixel sensor using column-level single-slope ADC

Dongmyung Lee; Kunhee Cho; Dongsoo Kim; Gunhee Han

doi:10.1109/TED.2008.2006735

Low-noise in-pixel comparing active pixel sensor using column-level single-slope ADC

Dongmyung Lee, Kunhee Cho, Dongsoo Kim, Gunhee Han

School of Integrated Technology

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

A conventional active pixel sensor (APS) uses a source follower (SF) in a pixel as a buffer. This SF is one of the major causes of nonlinearity, sensitivity degradation, and pixel readout noise. The proposed in-pixel comparing APS uses pixel transistors as a part of comparator for a single-slope ADC instead of using them as an SF. The prototype sensor was fabricated using a 0.35-μm 2P3M CMOS process. Experimental results show 15-times linearity improvement, 26% sensitivity enhancement, and 33% noise reduction over the conventional APS.

Original language	English
Pages (from-to)	3383-3388
Number of pages	6
Journal	IEEE Transactions on Electron Devices
Volume	55
Issue number	12
DOIs	https://doi.org/10.1109/TED.2008.2006735
Publication status	Published - 2008

Bibliographical note

Funding Information:
Manuscript received May 13, 2008; revised August 22, 2008. Current version published November 26, 2008. This work was supported in part by the Ministry of Knowledge Economy (MKE), Korea, under the Information Technology Research Center (ITRC) support program supervised by the Institute for Information Technology Advancement [(IITA); IITA-2008-(C1090-0801-0012)] and in part by Samsung Electronics Co. Ltd. The review of this paper was arranged by Editor J. Tower.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TED.2008.2006735

Cite this

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Low-noise in-pixel comparing active pixel sensor using column-level single-slope ADC

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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