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http://dx.doi.org/10.6109/jkiice.2015.19.9.2081

Design of CMOS Temperature Sensor Using Ring Oscillator  

Choi, Jin-Ho (Department of Embedded Software Engineering, Busan University of Foreign Studies)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.19, no.9, 2015 , pp. 2081-2086 More about this Journal
Abstract
The temperature sensor using ring oscillator is designed by 0.18㎛ CMOS process and the supply voltage is 1.5volts. The temperature sensor is designed by using temperature-independent and temperature-dependent ring oscillators and the output frequency of temperature-independent ring oscillator is constant with temperature and the output frequency of temperature-dependent ring oscillator decreases with increasing temperature. To convert the temperature to a digital value the output signal of temperature-independent ring oscillator is used for the clock signal and the output signal of temperature-dependent ring oscillator is used for the enable signal of counter. From HSPICE simulation results, the temperature error is less than form -0.7℃ to 1.0℃ when the operating temperature is varied from -20℃ to 70℃.
Keywords
temperature sensor; ring oscillator; time-to-digital converter; frequency-to-digital converter;
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1 J. He, C. Zhao, S. Lee, K. Peterson, R. Geiger and D. Chen, "Highly linear very compact untrimmed on-chip temperature sensor with second and third order temperature compensation," IEEE International Midwest Symposium on Circuits and Systems, pp. 288-291, 2010.
2 C. W. Lin and S. F. Lim, "A Highly Linear Temperature Sensor," in Proceedings of 8th International Conference Electrical Engineering/Electronics, Computer, Telecomm, amnd Information Technology, pp. 74-77, 2011
3 Poki Chen, Chun-Chi Chen, Chin-Chung Tsai and Wen-Fu Lu, "A Time-to-Digital-Converter-Based CMOS Smart Temperature Sensor," IEEE Journal of Solid-State Circuits, vol. 40, no. 8, pp.1642-1648, Aug. 2005.   DOI
4 Chun-Chi Chen, Poki Chen, An-Wei Liu, Wen-Fu Lu and Yu-Chi Chang, "An accurate CMOS delay-line-based smart temperature sensor for low-power low-cost systems," Measurement Science and Technology, vol.17, no. 4, pp.840-846, April 2006.   DOI
5 Shi-Wen Chen, Ming-Hung Chang, Wei-Chih Hsieh and Wei Hwang, "Fully On-Chip Temperature, Process, and Voltage Sensors," in Proceedings of International Symposium on Circuits and Systems, pp.2617-2620, 2013.
6 Shuang Xie and Wai Tung Ng, "Design of a, "A Low Power All-digital Self-calibrated Temperature Sensor using 65nm FPGAs," in Proceedings of International Symposium on Circuits and Systems, pp.2617-2620, 2013.
7 M. Sasaki, M. Ikeda and K. Asada, "A Temperature Sensor With an Inaccuracy of -1/+0.8oC Using 90nm 1V CMOS for Online Thermal Monitoring of VLSI Circuits," IEEE Trans. on Semiconductor Manufacturing, vol. 21, no. 2, pp.201-208, May 2008.   DOI