A Multifunction Snapshot ROIC Design for Low and High Background Application

B. Hu, Ping Li, A. Ruan
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引用次数: 8

Abstract

A snapshot infrared read out circuit (ROIC) with multifunction and very wide dynamic range was presented in the paper. The merits of the ROIC include small layout area, CTIA (capacitive transimpedance amplifier) integrator, selectable integration capacitors, adjustable operation bandwidth and anti-blooming. Through the snapshot mode and adjustable integration time from 1µs to 33ms (calculated by 30Hz frame frequency), the dynamic range can be extended efficiently, which provides high and low background operation abilities to the whole system. Based on the Gray code theory, random window access, dynamic image transposition, and 1, 2, 4 selectable channel outputs, can be realized by digital control circuits of the ROIC. The 32×32 array with pixel area of 30×30µm2 was successfully manufactured by 0.35µmCMOS process of HHNEC. The design also can be used in large format infrared focal plane array (IRFPA), such as 320×240, 640×480, etc.
低背景和高背景应用的多功能快照ROIC设计
介绍了一种多功能、宽动态范围的快照红外读出电路(ROIC)。该集成电路具有布局面积小、电容式跨阻放大器积分器、可选积分器、可调工作带宽和抗晕波等优点。通过快照模式和从1µs到33ms(按30Hz帧频率计算)的可调积分时间,可以有效地扩展动态范围,为整个系统提供高低背景操作能力。基于格雷码理论,可通过数字控制电路实现随机窗口访问、动态图像转置、1、2、4通道可选输出。采用HHNEC的0.35µmCMOS工艺,成功制备了像素面积为30×30µm2的32×32阵列。本设计还可用于大画幅红外焦平面阵列(IRFPA),如320×240、640×480等。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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