Temporal signal-to-noise ratio of a CMOS buried double junction image sensor

S. Feruglio; V. Fouad Hanna; G. Alquie; G. Vasilescu

doi:10.1117/12.608800

23 May 2005 Temporal signal-to-noise ratio of a CMOS buried double junction image sensor

S. Feruglio, V. Fouad Hanna, G. Alquie, G. Vasilescu

Proceedings Volume 5846, Noise and Information in Nanoelectronics, Sensors, and Standards III; (2005) https://doi.org/10.1117/12.608800
Event: SPIE Third International Symposium on Fluctuations and Noise, 2005, Austin, Texas, United States

Abstract

This paper presents an accurate temporal noise analysis of a new kind of CMOS image sensor for colour design. Operating in the charge storage mode, the noise of this APS is described with a time-varying model. During the reset phase, as the steady state is fast established, classical frequency-domain noise analysis can still be used to determine noise at both sensing nodes. Good agreement is observed between the results obtained by simulation with Cadence CAD tools of a 0.35μm-CMOS test structure and the behaviour predicted by the proposed analytical approach. During the integration phase, as both junctions are floating, the stationary state condition is never fulfilled and the noise analysis must be carried out in the time-domain. Our contribution consists in taking into account the non-linearity of the junction capacitance, which yields more realistic results. Considering only the dominant white noise component, it clearly appears that the junction non-linearity improves the output SNR for both sense nodes at high illumination and/or high integration period.

Citation Download Citation

S. Feruglio, V. Fouad Hanna, G. Alquie, and G. Vasilescu "Temporal signal-to-noise ratio of a CMOS buried double junction image sensor", Proc. SPIE 5846, Noise and Information in Nanoelectronics, Sensors, and Standards III, (23 May 2005); https://doi.org/10.1117/12.608800

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available