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Design of a 0.8V low power CMOS temperature sensor for RFID-based train axle temperature measurement

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4 Author(s)
Jianqin Qian ; Tsinghua Nat. Lab. for Inf. Sci. & Technol., Tsinghua Univ., Beijing, China ; Jia Chen ; Chun Zhang ; Liji Wu

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.

Published in:

Solid-State and Integrated Circuit Technology (ICSICT), 2010 10th IEEE International Conference on

Date of Conference:

1-4 Nov. 2010