Title :
A 4 Ã\x97 4 Logarithmic Spike Timing Encoding Scheme for Olfactory Sensor Applications
Author :
Guo, Bin ; Bermak, Amine ; Ambard, Maxime ; Martinez, Dominique
Author_Institution :
Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon
Abstract :
This paper presents a 4 times 4 logarithmic spike-timing encoding scheme used to translate the output of an integrated tin oxide gas sensor array into spike sequence, which is exploited to perform gas recognition. Hydrogen, ethanol and carbon monoxide were used to characterize the gas sensor array. The collected data were then used to test the proposed circuit for spike encoding and gas recognition. Simulation results illustrate that a particular analyte gas generates a unique spike pattern with certain spike ordering sequence, which is independent of the gas concentration. This unique spike sequence can thus be used to recognize different gases. In addition, the concentration information can also be extracted from the time-to-the-first spike in the sequence making it possible to perform not only gas/odor recognition but quantification as well.
Keywords :
electronic noses; sensor arrays; tin compounds; SnO; gas recognition; integrated tin oxide gas sensor array; logarithmic spike timing; olfactory sensor; spike encoding; Circuit testing; Encoding; Ethanol; Gas detectors; Hydrogen; Olfactory; Sensor arrays; Sensor phenomena and characterization; Timing; Tin; Gas Sensor Array; Logarithmic Spike Timing; Spike Sequence; Tin Oxide;
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
DOI :
10.1109/ISCAS.2007.378450