Noise bandwidth suppression circuit for low-noise IRFPA

Byunghyuck Kim; Sang-Gu Kang; Hee Chul Lee; Choong-Ki Kim

doi:10.1117/12.451959

23 January 2003 Noise bandwidth suppression circuit for low-noise IRFPA

Byunghyuck Kim, Sang-Gu Kang, Hee Chul Lee, Choong-Ki Kim

Proceedings Volume 4820, Infrared Technology and Applications XXVIII; (2003) https://doi.org/10.1117/12.451959
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

Noise property is a prime consideration in designing readout circuits for IR focal plane arrays. Output stage is frequently a dominant noise source in the readout circuit. From this pont of view, we suggest a new noise reduction circuit, which suppresses the noise bandwidth of the output stage. The Noise Bandwidth Suppression (NBS) circuit, which is a RC filter with bistable bandwidth, reduces dynamically the niose bandwidth with the same operation speed. From experimental results, it is found that the NBS circuit can successfully reduce the read noise. Using NBS and CDS, the output stage noise was down to 168μV_rms at 300K. It is expected that the output stage noise will be reduced to about μV_rms at the operation temperature of 77K and the designed readout circuit can satisfy 95% BLIP condition.

Citation Download Citation

Byunghyuck Kim, Sang-Gu Kang, Hee Chul Lee, and Choong-Ki Kim "Noise bandwidth suppression circuit for low-noise IRFPA", Proc. SPIE 4820, Infrared Technology and Applications XXVIII, (23 January 2003); https://doi.org/10.1117/12.451959

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