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BJT-Based, Energy-Efficient Temperature Sensors

  • Kamran Souri
  • Kofi A. A. Makinwa
Chapter
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Part of the Analog Circuits and Signal Processing book series (ACSP)

Abstract

As was shown in the previous chapter, the zoom-ADC is well suited for use in energy-efficient temperature sensors. It combines the strengths of SAR- and ΔΣ-ADCs to realize an accurate, and energy-efficient temperature to digital conversion. In this chapter, a sensor prototype that employs a 1 st -order zoom-ADC is described. It is compact and power efficient, requiring only a few μW to operate. Its energy-efficiency, however, is limited, due to the use of an inherently slow 1 st -order ΔΣ modulator. To improve energy-efficiency, a second prototype is presented, which requires less power to operate, while employing a 2 nd -order zoom-ADC and a faster sampling scheme. Finally, a third prototype for sensing very high temperatures ( > 150∘C) is presented, which uses robust techniques to overcome the different sources of temperature sensing errors at such temperatures.

Keywords

Final Conversion Step Bipolar Cores Coarse Conversion Military Temperature Range Thermal Calibration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  • Kamran Souri
    • 1
  • Kofi A. A. Makinwa
    • 2
  1. 1.SiTime Corp.Santa ClaraUSA
  2. 2.Delft University of TechnologyDelftThe Netherlands

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