Share Email Print

Proceedings Paper

Large CMOS imager using Hadamard transform based multiplexing
Author(s): Boris S. Karasik; Mark Wadsworth
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

We have developed a concept design for a large (~10k × 10k) CMOS imaging array whose elements are grouped in small subarrays with N pixels in each. The subarrays are code-division multiplexed using the Hadamard Transform (HT) based encoding. The Hadamard code improves the signal-to-noise (SNR) ratio to the reference of the read-out amplifier noise by a factor of N1/2. This way of grouping pixels reduces the number of hybridization bumps by N. A single chip layout has been designed and the architecture of the imager has been developed to accommodate the HT based multiplexing into the existing CMOS technology. The imager architecture allows for a trade-off between the speed and the sensitivity. The envisioned imager would operate at a speed >100 fps with the pixel noise < 20 e-. The power dissipation would be ~ 100 pW/pixel. The combination of the large format, high speed, high sensitivity and low power dissipation are very attractive for space applications.

Paper Details

Date Published: 19 May 2005
PDF: 8 pages
Proc. SPIE 5798, Spaceborne Sensors II, (19 May 2005);
Show Author Affiliations
Boris S. Karasik, Jet Propulsion Lab. (United States)
Mark Wadsworth, Tangent Technologies (United States)

Published in SPIE Proceedings Vol. 5798:
Spaceborne Sensors II
Peter Tchoryk Jr.; Brian Holz, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?