A high-linear low-power temperature-to-frequency converter with high robustness

Huiying Shi, Bo Zhou, Fuyuan Zhao

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Citations (Scopus)

Abstract

A low-power temperature sensor circuit, consisting of a proportional-to-absolute-temperature (PTAT) current generator and a slew-rate controlled relaxation oscillator, is implemented in 65nm CMOS for on-chip temperature measurement. The PTAT current and triangular relaxation oscillator, both based on matched switched-capacitor (SC) modules, conduct a high-linear temperature-to-frequency conversion (TFC). The triangular clamping voltages are generated by a differential bandgap reference (BGR), which employs low-threshold and regular-threshold diodes simultaneously, suppressing process deviations and ensuring TFC robust. The proposed design achieves a temperature inaccuracy of -1 ~ +0.2°C across 0°C to 80°C under ±10% supply and 3σ process variations, after one-point calibration. The average power dissipation of 900nW is observed from a 0.8V supply.

Original languageEnglish
Title of host publicationProceedings of 2019 IEEE 3rd Advanced Information Management, Communicates, Electronic and Automation Control Conference, IMCEC 2019
EditorsBing Xu
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages828-831
Number of pages4
ISBN (Electronic)9781728105130
DOIs
Publication statusPublished - Oct 2019
Event3rd IEEE Advanced Information Management, Communicates, Electronic and Automation Control Conference, IMCEC 2019 - Chongqing, China
Duration: 11 Oct 201913 Oct 2019

Publication series

NameProceedings of 2019 IEEE 3rd Advanced Information Management, Communicates, Electronic and Automation Control Conference, IMCEC 2019

Conference

Conference3rd IEEE Advanced Information Management, Communicates, Electronic and Automation Control Conference, IMCEC 2019
Country/TerritoryChina
CityChongqing
Period11/10/1913/10/19

Keywords

  • TFC
  • differential BGR
  • high robustness
  • switched-capacitor
  • temperature sensor

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Shi, H., Zhou, B., & Zhao, F. (2019). A high-linear low-power temperature-to-frequency converter with high robustness. In B. Xu (Ed.), Proceedings of 2019 IEEE 3rd Advanced Information Management, Communicates, Electronic and Automation Control Conference, IMCEC 2019 (pp. 828-831). Article 8984114 (Proceedings of 2019 IEEE 3rd Advanced Information Management, Communicates, Electronic and Automation Control Conference, IMCEC 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IMCEC46724.2019.8984114