Abstract
This paper describes a compact resistor-based temperature sensor that has been realized in a 180-nm CMOS process. It occupies only 6800 μ m2, thanks to the use of a highly digital voltage-controlled oscillator (VCO)-based phase-domain sigma-delta modulator, whose loop filter consists of a compact digital counter. Despite its small size, the sensor achieves ±0.35 °C (3 σ) inaccuracy from-35 °C to 125 °C. Furthermore, it achieves 0.12 °C (1 σ) resolution at 2.8 kSa/s, which is mainly limited by the time-domain quantization imposed by the counter.
Original language | English |
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Article number | 8753607 |
Pages (from-to) | 2649-2657 |
Number of pages | 9 |
Journal | IEEE Journal of Solid-State Circuits |
Volume | 54 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2019 |
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-careOtherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Keywords
- CMOS temperature sensor
- phase-to-digital converter
- thermal sensing
- voltage-controlled oscillator (VCO)-based phase-domain sigma-delta modulator (PDΣΔM)
- Wien bridge (WB)