DocumentCode :
1518764
Title :
A 400 
W Hz-Range Lock-In A/D Frontend Channel for Infrared Spectroscopic Gas Recognition
Author :
Sutula, Stepan ; Ferrer, Carles ; Serra-Graells, Francisco
Author_Institution :
Inst. de Microelectron. de Barcelona IMB, CSIC, Barcelona, Spain
Volume :
58
Issue :
7
fYear :
2011
fDate :
7/1/2011 12:00:00 AM
Firstpage :
1561
Lastpage :
1568
Abstract :
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 mm2 400 μW channel prototype integrated in 0.35 μm CMOS technology.
Keywords :
CMOS integrated circuits; analogue-digital conversion; high-pass filters; preamplifiers; CMOS circuits; CMOS technology; channel circuitry; differential blind cancellation; digital programmability; high-pass filtering; lock-in A/D conversion; lock-in A/D frontend channel; long-wave infrared spectroscopic gas recognition; power 400 muW; pre-amplification; size 0.35 mum; transistor subthreshold operation; CMOS integrated circuits; Demodulation; Optical sensors; Sensor arrays; Thermal sensors; Transistors; Tuning; A/D converter (ADC); CMOS; gas recognition; lock-in; long-wave infrared (LWIR); low power; sensor frontend;
fLanguage :
English
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
Publisher :
ieee
ISSN :
1549-8328
Type :
jour
DOI :
10.1109/TCSI.2011.2142770
Filename :
5770188
Link To Document :
