Real-time environmental monitoring system with CMOS universal sensor interface IC and multi-channel nanomaterial-based sensor

Abstract

In today’s internet of things (IoT) era, people spend most of their lives indoors. However hazardous chemical substances from building materials and less ventilation cause respiratory diseases. To prevent these respiratory diseases, real-time environmental monitoring system containing environmental sensors and sensor interface circuits is implemented. For this purpose, universal sensor interface architecture which can be applied to different types of sensor outputs is proposed. Furthermore, CMOS IC having wide acquisition range, sensor baseline compensation, and circuit noise reduction techniques is implemented, and its performance is verified. Moreover, multi-channel interface circuit board for multi-channel nanomaterial-based sensor is designed, and its operation is also verified.