A 400 mu W Hz-Range Lock-In A/D Frontend Channel for Infrared Spectroscopic Gas Recognition

作者：Sutula Stepan^*; Ferrer Carles; Serra Graells Francisco

来源：IEEE Transactions on Circuits and Systems I-Regular Papers, 2011, 58(7): 1561-1568.

DOI：10.1109/TCSI.2011.2142770

• A/D converter (ADC)
• CMOS
• gas recognition
• low power
• lock-in
• long-wave infrared (LWIR)
• sensor frontend

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 preamplification, 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 mu W channel prototype integrated in 0.35 mu m CMOS technology.

• 出版日期2011-7