Novel current-mode background suppression for 2-D LWIR applications |
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| Authors: | Doo Hyung Woo Sang Gu Kang Hee Chul Lee |
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| Affiliation: | Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejon, South Korea; |
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| Abstract: | A new readout circuit involving two-step current-mode background suppression is studied for two-dimensional long-wavelength infrared focal plane arrays (2-D LWIR FPAs). Buffered direct injection (BDI) and a feedback amplifier are used for the input circuit and background suppression circuit, respectively. The readout circuit has been fabricated using a 0.6-/spl mu/m 2-poly 3-metal CMOS process for a 64/spl times/64 LWIR HgCdTe IR array with a pixel size of 50 /spl mu/m/spl times/50 /spl mu/m. The simple pixel circuit has a very small skimming error of less than 0.3% and low noise characteristics for an adequate calibration range and integration time. |
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