Title :
A low-power wide-dynamic-range readout IC for breath analyzer system
Author :
Yingkan Lin ; Gouma, Perena ; Stanacevic, Milutin
Author_Institution :
Dept. of Electr. & Comput. Eng., Stony Brook Univ., Stony Brook, NY, USA
Abstract :
We present a low-power wide-dynamic-range readout circuit that directly interfaces a selective metal-oxide gas sensor. The proposed novel readout architecture implements an adaptive baseline compensation and limits the sensor current. The readout IC can interface the sensors with the baseline resistance from 1 kΩ to 100 MΩ and measures the gas induced resistance change in the range from 0.05% to 10% of the baseline resistance. The simulations demonstrate the 166 dB dynamic range of the readout circuit and 113 μW power consumption amenable to the sensors that can operate at room temperature for the application of the proposed system in portable breath analyzers.
Keywords :
chemical variables measurement; gas sensors; integrated circuits; pneumodynamics; portable instruments; readout electronics; adaptive baseline compensation; baseline resistance; gain 166 dB; gas measurement; low-power wide-dynamic-range readout IC; portable breath analyzer system; power 113 muW; power consumption; resistance 1 kohm to 100 Mohm; selective metal-oxide gas sensor; temperature 293 K to 298 K; Calibration; Dynamic range; Electrical resistance measurement; Gas detectors; Immune system; Power demand; Resistance;
Conference_Titel :
Circuits and Systems (ISCAS), 2013 IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-5760-9
DOI :
10.1109/ISCAS.2013.6572219
