標題: A Current-Mode Dual-Slope CMOS Temperature Sensor
作者: Hung, Chung-Chih
Chu, Hsing-Chien
電機學院
College of Electrical and Computer Engineering
關鍵字: Temperature sensors;temperature-to-digital;dual-slope;inverter-based comparator;subthreshold PTAT
公開日期: 1-Apr-2016
摘要: A current-mode dual-slope CMOS temperature sensor is presented in this paper. It employs a proportional-to-absolute-temperature (PTAT) current generator, which operates in the sub-threshold region, and a novel temperature-insensitive CMOS inverter, replacing a traditional voltage comparator for power saving, to create PTAT pulsewidth. A binary counter is then utilized to quantize the pulse to a digital output value. It achieves a temperature inaccuracy of -3.39 degrees C-2 degrees C over the common industrial temperature range from -40 degrees C to 85 degrees C for five measured chip samples by utilizing the second-order curvature correction, and an average temperature resolution of 0.259 degrees C/LSB. The conversion rate of the digital output data is 3.5 kSa/s. The 2 V supply voltage is utilized and the total power dissipation is 14.286 mu W, leading to 4.082-nJ/Sa energy efficiency and 0.274-nJ degrees C-2 resolution figure of merit (FoM). It was fabricated by the TSMC 0.35-mu m CMOS process, and the core area occupies 0.0345 mm(2). The utilized dual-slope architecture has the advantages of compactness, power-saving, and high design flexibility.
URI: http://dx.doi.org/10.1109/JSEN.2015.2511075
http://hdl.handle.net/11536/133958
ISSN: 1530-437X
DOI: 10.1109/JSEN.2015.2511075
期刊: IEEE SENSORS JOURNAL
Volume: 16
Issue: 7
起始頁: 1898
結束頁: 1907
Appears in Collections:Articles