Towards a fully integrated electronic nose SoC

Abstract

Electronic noses (e-nose) have been studied for several years and extensively applied; however, they are limited by their volume and high manufacturing cost. Portable devices have become popular in recent years; therefore, it is crucial to integrate e-noses in portable devices (e.g., mobile phones). This study used TSMC 90nm 1P9M CMOS MSG technology to develop a front-end system-on-chip (SoC) for an electronic nose. The SoC contained interdigitated electrodes, multi-channel sensor interface circuits, an analog to digital converter, and a digital continuous restricted Boltzmann machine (CRBM). Various conducting-polymer materials were titrated on the interdigitated electrodes to form an on-chip sensor array. This SoC was controlled through an external microcontroller to perform odor identification and analysis. The simulation results of the SoC and gas classification show that this chip is suitable for portable applications and further integration.

Artificial Olfactory Neuron for an In‐Sensor Neuromorphic Nose

“…This power consumption for the olfactory neuron module was much lower compared to the power consumption for the conversion circuits to transfer data from the sensor to the processors in an E‐nose chip. [ 55–57 ] Note that P peak (not P avg ) is similar to the power consumption of interface circuits and ADCs in the conventional E‐nose chip, although P peak includes the power consumed in the sensor part, indicating a large power reduction (Table S2, Supporting Information). However, further development of ultralow power gas sensors will help the reduction of power consumption of the entire gas sensing module, because the major power consumption occurs in the microheater for the SMO gas sensor.…”

A low cost, handheld E-nose for renal diseases early diagnosis

“…Different electronic noses already exist. However, they are usually not fully handheld systems as they require a personal computer type system to exploit the measurements [4]. Another drawback is their cost, about few thousands of dollars.…”