A chip architecture that integrates an optical sensor and a pixel level processing element based on binary stochastic arithmetic is proposed. The optical sensor is formed by an array of fully connected pixels, and each pixel contains a sensing element and a Pulse Frequency Modulator (PFM) converting the incident light to bit streams of identical pulses. The processing element is based on binary stochastic arithmetic to perform signal processing operations on the focal plane VLSI circuit. A 96 × 64 CMOS image sensor is fabricated using 0.5μm CMOS technology and achieves 29 × 29μm pixel size at 15% fill factor.
|Journal||Proceedings - IEEE International Symposium on Circuits and Systems|
|Publication status||Published - 2003|
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials