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There is a strong motivation for the development of new low power sensors for wireless passive applications such as RFID. In this work, a combination of a MEMS capacitive pressure transducer and a capacitive to digital converter compatible with a sensor enabled RFID tag are presented. The MEMS transducer has been designed and fabricated using a MetalMUMPs process. Its characterization showed an output...
A novel wireless temperature monitoring system for electric machines is presented based on fully passive UHF RFID sensor tags. The system is composed of a custom designed IC UHF RFID sensor tag connected to an external μP and ADC through a master-slave series-peripheral interface (SPI) connection. The sensing element is a NTC 10kOhm thermal resistor (−40° to 300°C). The sensor tag, which includes...
This work presents a full passive UHF RFID pressure sensor tag which uses a nonius based TDC capacitive sensor interface. The proposed converter has a fully digital output and allows reducing power consumption while maintaining the required resolution. The nonius based TDC has been designed using TSMC 90nm standard CMOS technology. Post-layout simulations show that the converter presents a 12 bit...
There is a strong motivation for the implementation of electronic identification systems and wireless sensors in hospitals. This work presents a sensor enabled passive RFID tag for patient monitorization. Special attention is paid to the analog FE, which has been designed and implemented in a low cost 0.35 μm CMOS standard process. The proposed front-end architecture allows the implementation of power...
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