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A Quantum-Well Infrared Photodetector Focal Plane Array Read-Out Integrated Circuit Unit Cell (QWIP-FPA ROIC unit cell) is prototyped and characterized. The implemented architecture was the source-follower direct injection (SFDI) which presents high linearity, reduced area and high integration time capability. Details of its behavior, as well as secondary effects, are discussed from the experimental...
State-of-the-art image sensor arrays have not been able to operate at frame rates that exceed tens to hundreds of thousands of frames per second. The main bottle neck preventing imaging at higher frame rates is the time required to access the array, convert the image data from analog to digital, and transmit the data off the image sensor chip. The later is considered the most significant source of...
Single Photon Avalanche Diodes (SPADs) create a very short duration voltage pulse whenever a photon is detected. The resulting high sensitivity and temporal resolution makes them useful in a range of applications. In this paper two different analogue circuits are reported that are suitable for imaging applications that can record the number of detected photons in the limited area available between...
This paper presents a novel current-mode readout circuits based on logarithmic analog-to-digital converter (LADC) for high speed and high background current infrared focal-plane-array (IR FPA) imaging. With the implementation of LADC, the photocurrent can be directly converted to digital value in pixel level. Zero reset noise is achieved with continuous operation of photodetectors to further reduce...
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