Open AccessLow‐noise readout circuit for thermo‐electrical cooler‐less uncooled microbolometer infrared imager
Author(s) -
Liu Dahe,
Lu Wengao,
Lei Shuyu,
Chen Zhongjian
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2015.3407
Subject(s) - microbolometer , infrared , bolometer , materials science , noise (video) , optoelectronics , infrared heater , electrical engineering , optics , detector , physics , engineering , computer science , artificial intelligence , image (mathematics)
A low‐noise analogue frontend readout circuit is presented for VOx microbolometer infrared imager without thermo‐electrical cooler. A modified differential mirror structure with substrate temperature and self‐heating effect compensation ability is used, targeting below 40 mK noise equivalent temperature difference (NETD) with 17 μm pixel pitch. Noise characteristics are investigated to give an optimal trade‐off approach to reach lower NETD at same power consumption compared with traditional readout structures.