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We propose a bio-inspired signal processing method for odor discrimination. A spiking neural network is trained with a supervised learning rule so as to classify the analog outputs from a monolithic 4times4 tin oxide gas sensor array implemented in our in-house 5 mum process. This scheme has been successfully tested on a discrimination task between 4 gases (hydrogen, ethanol, carbon monoxide, methane)...
This paper presents a monolithic 4times4 tin oxide gas sensor array together with on-chip multiplexing and differential read-out circuitry. In contrast to the conventional voltage divider read-out technique, a novel differential read-out circuit (DRC) for tin oxide gas sensors is proposed. The output of the DRC is simply proportional to the difference between the voltage on the two electrodes of the...
The paper describes a fabrication process for convex micro-hotplates (MHPs) using surface micro-machining technology. Surface micro-machining provides simplified process and CMOS compatibility over buck microelectromechanical systems (MEMS). The low yield of the latter limits the dimension of the fabricated array while limited sacrificial layer thickness in the former leads to higher power consumption...
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