An asynchronous time-based image sensor

Abstract— In this paper we propose a fully asynchronous, timebased image sensor, which is characterized by high temporal resolution, low data rate (near complete temporal redundancy suppression), high dynamic range, and low power consumption. Autonomous pixels asynchronously communicate the detection of relative changes in light intensity, and the time from change detection to the threshold crossing of a photocurrent integrator, so encoding the instantaneous pixel illumination shortly after the time of a detected change. The chip is being implemented in a standard 0.18µm CMOS process and measures less than 10×8mm2 at 304×240 pixel resolution.

• Type: Conference
• Year: 2008
• Where: ISCAS
• Authors: Christoph Posch, Daniel Matolin, Rainer Wohlgenannt
• Keywords: Hardware, Instantaneous Pixel Illumination, ISCAS 2008, Low Power Consumption, Temporal Redundancy Suppression