Source follower noise limitations in CMOS active pixel sensors

Keith M. Findlater; Jerome M. Vaillant; Donald J. Baxter; Christine Augier; Didier Herault; Robert K. Henderson; Jed Hurwitz; Lindsay A. Grant; Jean-Marc Volle

doi:10.1117/12.512969

19 February 2004 Source follower noise limitations in CMOS active pixel sensors

Keith M. Findlater, Jerome M. Vaillant, Donald J. Baxter, Christine Augier, Didier Herault, Robert K. Henderson, Jed Hurwitz, Lindsay A. Grant, Jean-Marc Volle

Author Affiliations +

Proceedings Volume 5251, Detectors and Associated Signal Processing; (2004) https://doi.org/10.1117/12.512969
Event: Optical Systems Design, 2003, St. Etienne, France

Abstract

CMOS imagers are commonly employing pinned photodiode pixels and true correlated double sampling to eliminate kTC noise and achieve low noise performance. Low noise performance also depends on optimisation of the readout circuitry. This paper investigates the effect of the pixel source follower transistor on the overall noise performance through several characterization methods. The characterization methods are described, and experimental results are detailed. It is shown that the source follower noise can be the limiting factor of the image sensor and requires optimisation.

Citation Download Citation

Keith M. Findlater, Jerome M. Vaillant, Donald J. Baxter, Christine Augier, Didier Herault, Robert K. Henderson, Jed Hurwitz, Lindsay A. Grant, and Jean-Marc Volle "Source follower noise limitations in CMOS active pixel sensors", Proc. SPIE 5251, Detectors and Associated Signal Processing, (19 February 2004); https://doi.org/10.1117/12.512969

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