Abstract
A highly adaptive multi-sensor SoC comprising four integrated on-chip sensors and a sm art wireless acquisition system is reali zed in standard CMOS process for the first time. To intel- ligently process different types (C, R, I, and V) of sensor signals, a linear (R-square is 0.999) and recon figurable sensor readout is proposed based on switched-capacit or circuit technology. In addi- tion, a dual-input energy harvesti ng interface with conversion ef- ficiency of 73% is also integrated to pick up light energy and RF power, which potentiates long-term use without battery replace- ment. The entire SoC occupies die area of 11.25 mm 2 and con- sumes only 942.9 µW. Experimental results show that four physi- ological parameters (temperature, glucose and protein concentra- tion, and pH value) can be simultaneously monitored using this chip. This system can be seen as a universal sensor platform. Dif- ferent types of sensors can be easily integrated into it for convenient use, which dramatically reduces time consuming of building a new sensor system.