High fill-factor native logarithmic pixel: Simulation, design and layout optimization

Amine Bermak, Abdesslam Bouzerdoum, Kamran Eshraghian

Research output: Contribution to journalConference article

14 Citations (Scopus)


In this paper we investigate important issues in the design of the logarithmic CMOS pixel. In particular, much attention is paid to the optimization of pixel performance in terms of output gain, dynamic range, and fill-factor. In order to increase the gain-bandwidth product, we propose to use the native transistor as source follower. The performance of such a pixel is compared with that of conventional logarithmic pixels. It is shown that the native source follower yields a significant increase in the gain-bandwidth product. In addition, we propose a layout floor-planning strategy which allows us to achieve a 46% fill-factor. In order to compare the performance of the proposed pixel with the conventional NMOS and PMOS logarithmic pixels, a VLSI prototype has been realized using 0.7 μm CMOS technology.

Original languageEnglish
Pages (from-to)V-293-V-296
JournalProceedings - IEEE International Symposium on Circuits and Systems
Publication statusPublished - 3 Dec 2000
EventProceedings of the IEEE 2000 Internaitonal Symposium on Circuits and Systems - Geneva, Switz
Duration: 28 May 200031 May 2000


ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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