Browse > Article
http://dx.doi.org/10.7471/ikeee.2019.23.2.681

On-Chip Digital Temperature Sensor Using Delay Buffers Based the Pulse Shrinking Method  

Yun, Seung-Chan (Magnachip Semiconductor Co.)
Kim, Tae-Un (School of Electrical and Computer Engineering, Chungbuk National University)
Choi, Ho-Yong (School of Electrical and Computer Engineering, Chungbuk National University)
Publication Information
Journal of IKEEE / v.23, no.2, 2019 , pp. 681-686 More about this Journal
Abstract
This paper proposes a CMOS temperature sensor using inverter delay chains of the same size based on the pulse shrinking method. A temperature-pulse converter (TPC) uses two different temperature delay lines with inverter chains to generate a pulse in proportion to temperature, and a time-digital converter (TDC) shrinks the pulse using inverter chains of the same size to convert pulse width into a digital value to be insensitive to process changes. The chip was implemented with a $0.49{\mu}m{\times}0.23{\mu}m$ area using a $0.35{\mu}m$ CMOS process with a supply voltage of 3.3V. The measurement results show a resolution of $0.24^{\circ}C/bit$ for 9-bit data for a temperature sensor range of $0^{\circ}C$ to $100^{\circ}C$.
Keywords
temperature sensor; digital; pulse shrinking method; on-chip; time-to-digital converter;
Citations & Related Records
연도 인용수 순위
  • Reference
1 C. Chung and C. Yang, "An autocalibrated all-digital temperature sensor for on-chip thermal monitoring," IEEE Trans. on Circuits and Systems II, vol.58, no.2, pp.105-109, 2011. DOI: 10.1109/TCSII.2010.2104016   DOI
2 C. S. Singh and K. Halonen, "A CMOS based ${\mu}$-power smart temperature sensor for oN-chip thermal monitoring," in Proc. of IEEE the 57th International Midwest Symposium on Circuits and Systems, pp.382-385, 2014. DOI: 10.1109/CICC.2015.7338490
3 A. L. Aita, M. A. P. Pertijs, K. A. A. Makinwa, and J. H. Huijsing, "A CMOS smart temperature sensor with a batch-calibrated inaccuracy of ${\pm}0.25^{\circ}C(3{\sigma})$ from $-70^{\circ}C$ to $130^{\circ}C$," in Proc. of IEEE Int. Solid-State Circuits Conf. Dig. Tech. Papers, pp.342-343, 2009. DOI: 10.1109/ISSCC.2009.4977448   DOI
4 G. Roh, "Design of self-refresh controller for low-power 1T graphic memory," Master Thesis, ChungBuk National Univ., 2013.
5 S. and K. Klepacki, "An FPGA-integrated time-to-digital converter based on two-stage pulse shrinking," IEEE Trans. on Instrumentation and Measurement, vol.59, no6, pp.1663-1670, 2010. DOI: 10.1109/TIM.2009.2027777   DOI
6 P. Chen, C.-C. Chen, C.-C. Tsai, and W.-F. Lu, "A time-to-digital converter based CMOS smart temperature sensor," IEEE J. Solid-State Circuits, vol.40, no.8, pp.1642-1648, 2005. DOI: 10.1109/JSSC.2005.852041   DOI
7 D. Ha, K. Woo, S. Meninger, T. Xanthopoulos, E. Crain, and D. Ham, "Time-domain CMOS temperature sensors with dual delay-locked loops for microprocessor thermal monitoring," IEEE Trans. on VLSI Syst, vol.20, no.9, pp.1590-1601, 2012. DOI: 10.1109/TVLSI.2011.2161783   DOI
8 H. J. Oguey and D. Aebischer, "CMOS current reference without resistance," IEEE J. of Solid-State Circuits, vol.32, no.7, pp.1132-1135, 1997. DOI: 10.1109/4.597305   DOI