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Design of a ROIC for scanning type HgCdTe LWIR focal plane arrays

Yazıcı, Melik and Kayahan, Hüseyin and Ceylan, Ömer and Gürbüz, Yaşar (2010) Design of a ROIC for scanning type HgCdTe LWIR focal plane arrays. In: Conference on Infrared Technology and Applications XXXVI, Orlando, Florida, USA

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Official URL: http://dx.doi.org/10.1117/12.850130

Abstract

Design of a silicon readout integrated circuit (ROIC) for LWIR HgCdTe Focal Plane is presented. ROIC incorporates time delay integration (TDI) functionality over seven elements with a supersampling rate of three, increasing SNR and the spatial resolution. Novelty of this topology is inside TDI stage; integration of charges in TDI stage implemented in current domain by using switched current structures that reduces required area for chip and improves linearity performance. ROIC, in terms of functionality, is capable of bidirectional scan, programmable integration time and 5 gain settings at the input. Programming can be done parallel or serially with digital interface. ROIC can handle up to 3.5V dynamic range with the input stage to be direct injection (DI) type. With the load being 10pF capacitive in parallel with 1MΩ resistance, output settling time is less than 250nsec enabling the clock frequency up to 4MHz. The manufacturing technology is 0.35μm, double poly-Si, four-metal (3 metals and 1 top metal) 5V CMOS process.

Item Type:Papers in Conference Proceedings
Additional Information:Article number: 76603X
Uncontrolled Keywords:Read-out IC (ROIC), time delay integration (TDI), direct injection (DI), focal plane array, switched current (SI), current memory, flipped voltage follower (FVF), bulk driven
Subjects:UNSPECIFIED
ID Code:16391
Deposited By:Yaşar Gürbüz
Deposited On:28 Feb 2011 16:34
Last Modified:28 Feb 2011 16:34

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