A Time-to-first Spike CMOS Imager
Abstract
A novel time-to-first-spike CMOS imager is presented, in which the timing of a single spike from each pixel encodes the illuminance of each pixel. This temporal representation of illuminance can widen the image sensor dynamic range to over 100dB. To reduce power consumption, an asynchronous address-event readout technique is incorporated. The imager essentially implements a pixel-level A/D conversion and benefits from the continued process scaling to deep submicron levels. Results are shown from a 32 x 32 pixel imager fabricated in the 0.5μm AMI process with measured dynamic range of 104dB in one image. A test chip with one pixel and digital control logic has been fabricated through MOSIS using the TSMC 0.18μm standard digital CMOS process. It has demonstrated the expected functionalities. A modified architecture is also proposed for a larger imager array.
Recommended Citation
X. Qi et al., "A Time-to-first Spike CMOS Imager," Proceedings IEEE International Symposium on Circuits and Systems, vol. 4, pp. V - 824, Institute of Electrical and Electronics Engineers, Sep 2004.
Department(s)
Electrical and Computer Engineering
International Standard Serial Number (ISSN)
0271-4310
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Institute of Electrical and Electronics Engineers, All rights reserved.
Publication Date
06 Sep 2004
