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
Hauptverfasser: Sutula, S., Ferrer, C., Serra-Graells, F.
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.
ISSN:1549-8328
1558-0806
DOI:10.1109/TCSI.2011.2142770