An RF-powered temperature sensor designed for biomedical applications

Abstract

Continuous patient monitoring enables early detection and treatment of diseases. Small and wireless devices are more comfortable to the patient and simplify the implantation procedure. This paper presents the design and partial testing of an integrated RF-powered temperature sensor suitable for the human body temperature range, from 35 to 42°C. The device was designed using a 130-nm standard CMOS technology and it receives energy from a 900-MHz signal that has power as low as -10 dBm. A calibration method was designed to obtain conversion errors smaller than 0.2oC.