A time domain differential CMOS temperature sensor with reduced supply sensitivity

M. K. Law, Amine Bermak

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

In this paper, a Time Domain CMOS Temperature Sensor with Differential Temperature Sensing Circuit and Reduced Supply Sensitivity is presented. Differential temperature sensing is achieved by using two delay generators, each for generating positively and negatively proportional to temperature delays respectively. The effective temperature signal can then be increased for quantization. The variation in supply voltage is sensed and converted to bias currents proportional to supply voltage. Temperature error due to 10% supply voltage variation can be reduced to less than ±1°C. A temperature dependent pulse will be generated and then digitized by a ripple counter using an external clock signal. Simulation results show that a ±0.6°C with two-point calibration can be achieved with a temperature variation from 0°C to 100°C. The circuit consumes 12μA and 70μA in static and temperature acquiring mode, respectively, and has a sampling rate of more than 80k samples/s.

Original languageEnglish
Title of host publication2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008
Pages2126-2129
Number of pages4
DOIs
Publication statusPublished - 2008
Externally publishedYes
Event2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008 - Seattle, WA, United States
Duration: 18 May 200821 May 2008

Other

Other2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008
CountryUnited States
CitySeattle, WA
Period18/5/0821/5/08

Fingerprint

Temperature sensors
Temperature
Electric potential
Bias currents
Networks (circuits)
Clocks
Calibration
Sampling

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Law, M. K., & Bermak, A. (2008). A time domain differential CMOS temperature sensor with reduced supply sensitivity. In 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008 (pp. 2126-2129). [4541870] https://doi.org/10.1109/ISCAS.2008.4541870

A time domain differential CMOS temperature sensor with reduced supply sensitivity. / Law, M. K.; Bermak, Amine.

2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008. 2008. p. 2126-2129 4541870.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Law, MK & Bermak, A 2008, A time domain differential CMOS temperature sensor with reduced supply sensitivity. in 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008., 4541870, pp. 2126-2129, 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008, Seattle, WA, United States, 18/5/08. https://doi.org/10.1109/ISCAS.2008.4541870
Law MK, Bermak A. A time domain differential CMOS temperature sensor with reduced supply sensitivity. In 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008. 2008. p. 2126-2129. 4541870 https://doi.org/10.1109/ISCAS.2008.4541870
Law, M. K. ; Bermak, Amine. / A time domain differential CMOS temperature sensor with reduced supply sensitivity. 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008. 2008. pp. 2126-2129
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