Title :
Design of a 0.8V low power CMOS temperature sensor for RFID-based train axle temperature measurement
Author :
Qian, Jianqin ; Chen, Jia ; Zhang, Chun ; Wu, Liji
Author_Institution :
Tsinghua Nat. Lab. for Inf. Sci. & Technol., Tsinghua Univ., Beijing, China
Abstract :
A novel CMOS temperature sensor embedded in a passive UHF RFID tag is presented. The sensor consists of a temperature-to-current converter, two current-starved ring oscillators and two digital counters. High power consumption band-gap voltage references and traditional ADCs are not used for low power design. Post-layout simulation show that the power consumption is 0.64 μW with a supply voltage of 0.8 V at room temperature (27°C), and the conversion rate is up to 1 kHz. The average temperature resolution is 0.2°C/LSB from -40°Cr~120°C. The sensor is implemented in CMOS 0.18 μm and the core occupies an area of 0.09 mm2.
Keywords :
CMOS integrated circuits; UHF integrated circuits; UHF oscillators; axles; counting circuits; low-power electronics; passive networks; radiofrequency identification; railways; temperature measurement; temperature sensors; RFID-based train axle temperature measurement; current-starved ring oscillator; digital counter; low power CMOS temperature sensor; passive UHF RFID tag; post-layout simulation; power consumption; size 0.18 mum; temperature resolution; temperature-to-current converter; voltage 0.8 V; CMOS Temperature sensor; low power; low voltage;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2010 10th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-5797-7
DOI :
10.1109/ICSICT.2010.5667606
