A high-performance readout circuit (ROIC) for VLWIR FPAs with novel current mode background suppression

This study designs a 32 × 32 readout integrated circuit (ROIC) for N-on-P very long wavelength (VLWIR) detectors. The new ROIC has the ability to operate with current mode background suppression in two steps, and increases the integration time and the signal-to-noise ratio (SNR) of image data. To im...

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Bibliographic Details
Published in2012 International Conference on Measurement, Information and Control Vol. 2; pp. 869 - 873
Main Authors Hao Li-chao, Ding Rui-jun, Zhang Jun-ling, Huang Ai-bo, Chen Hong-lei
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2012
Subjects
background suppression
BDI
high background
Linearity
Registers
ROIC
rolling mode
snapshot mode
VLWIR
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ISBN9781457716010
1457716011
DOI10.1109/MIC.2012.6273425

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Summary:This study designs a 32 × 32 readout integrated circuit (ROIC) for N-on-P very long wavelength (VLWIR) detectors. The new ROIC has the ability to operate with current mode background suppression in two steps, and increases the integration time and the signal-to-noise ratio (SNR) of image data. To improve the linearity and provide tight control of the detector bias, a buffered direct injection (BDI) unit cell is used as input circuit. By means of a sample and hold circuit, the infrared focal plane array (IRFPA) can be operated in snapshot mode and rolling mode. The simulation results confirm these advantages. With the 5.0 V power supply, the VLWIR ROIC provides the output dynamic range over 2.0 V and the well capacity more than 1 × 10 8 e - . The skimming error is less than 0.5%. The final chip will be fabricated with HHNEC 0.35 um 1P4M process technology, and the pixel occupies a 60 um × 60 um area. It can be operated at the temperatures of 50 K.
ISBN:9781457716010
1457716011
DOI:10.1109/MIC.2012.6273425