A 250mW, 60Frames/s128x720 pixel 9b CMOS digital image sensor

摘要

Many imaging systems with industrial and machine vision applications now require sensors with a combination of >1Mpixel resolution and >30frames/s rate. This must be achieved at low cost and with minimum impact on system complexity or powerconsumption. Reported CCDs have this level of performance. However, the inherent analog nature of CCDs leads to a requirement for driving large external loads at high frequency from the image sensor. CMOS active pixel sensors (APS) are ideal for theseapplications due to the possibility for on-chip signal processing (especially analog-to digital converters [ADC]) integration and inherent low power consumption [1]. This advantage is especially important in large-format high speed imaging applications.Other CMOS image sensors reported to date have either targeted small-format applications or are low frame rate devices.