A 400 \mu W Hz-Range Lock-In A/D Frontend Channel for Infrared Spectroscopic Gas Recognition
This paper presents a low-power and fully integrated frontend channel for long-wave infrared spectroscopic gas recognition. The proposed channel circuitry includes: input sensor biasing, sub-Hz high-pass filtering and pre-amplification, differential blind cancellation, and lock-in A/D conversion. Th...
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Veröffentlicht in: | IEEE transactions on circuits and systems. I, Regular papers Regular papers, 2011-07, Vol.58 (7), p.1561-1568 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | This paper presents a low-power and fully integrated frontend channel for long-wave infrared spectroscopic gas recognition. The proposed channel circuitry includes: input sensor biasing, sub-Hz high-pass filtering and pre-amplification, differential blind cancellation, and lock-in A/D conversion. The proposed CMOS circuits make extensive use of transistor subthreshold operation and digital programmability. Experimental results are presented for a 0.3 mm 2 400 μW channel prototype integrated in 0.35 μm CMOS technology. |
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ISSN: | 1549-8328 1558-0806 |
DOI: | 10.1109/TCSI.2011.2142770 |