Design of a 2.45GHz wireless temperature sensor in 130nm CMOS technology

摘要

This paper presents a wireless temperature sensor implemented in a 130nm CMOS process. A sensor measures the temperature and presents it as a voltage signal that is mapped to a PWM signal. The PWM signal switches a VCO on and off, generating an OOK modulated RF transmission. The circuit is supplied by 1.2V and has a temperature range of 0~100 degrees Celsius. The sensor sensitivity is measured as 1.8mV/degrees Celsius. The total power consumption of the chip is 7.75mW and the RF output power is measured as 0dBm. The VCO frequency is 2.5 GHz, with 350MHz (14%) tuning range.