Methods for Enabling In-Field of Near-Sensor Digital Imaging Function

Imaging systems traditionally utilize readout integrated circuits (ROICs) that carry out the tasks of processing and data transfer. ROICs typically have specialized circuitry configured for the specific needs of an application. However, because of this specialization, ROICs are only compatible with a number of imaging device types, and their function is modally constrained. Furthermore, the processing capabilities of the ROIC are hampered by size constraints, limiting their efficiency and functionality. The challenges posed by limited modes of operation and compatibility issues make using different applications with the same imaging device a task. This particular problem instigates the need for constant updates or replacements of ROICs for deploying to different applications, resulting in increased cost and reduced efficiency. Associatively, the size constraints on the ROIC limit its processing functionality and interfere with its performance.

Technology Description

The field-programmable imaging array (FPIA) is a technological advancement that combines a customized readout integrated circuit (ROIC) sensor interface with field-programmable gate array (FPGA) circuitry. This combination allows for post-fabrication definition of ROIC operation modes, overcoming the limitations of traditional ROICs, which only operate in a few modes. The FPIA is typically included in a three-chip stack that also includes an analog sensor interface chip for digitizing analog signals and an imaging device. This technology is unique because it breaks the barrier of ROIC compatibility issues, enabling a wider variety of imaging devices and applications. Additionally, it addresses the size constraint issue of the conventional ROIC circuitry by leveraging FPGA circuitry. The FPIA manages to extend the functionality of the imaging device, enabling dynamic programming post-fabrication to match the requirements of diverse applications.