Abstract
BJT-based temperature sensors are widely used due to their high accuracy over a wide temperature range with a low-cost 1-point trim. Although resistor-based sensors can achieve better energy efficiency, they typically require a 2-point trim to achieve comparable accuracy, while thermal-diffusivity based sensors achieve superior accuracy at the cost of energy efficiency [1]. This paper presents a BJT-based temperature sensor that achieves both excellent accuracy and energy efficiency. To avoid the kTfC noise limitations of conventional discrete-time (OT) readout schemes [2], [3], it employs a compact continuous-time (CT) front-end. Component mismatch, which often limits the accuracy of CT front-ends [4], [5], is mitigated by a combination of dynamic element matching (OEM) and a low-cost resistor-ratio self-calibration scheme. As a result, the sensor achieves a resolution FoM of 0.85textpJcdotK 2, and a competitive inaccuracy of pm 0.1 circC (3sigma) from -55 circC tO 125 circC after a 1-point trim. This makes it 4times more energy-efficient than state-of-the-art BJT-based sensors with similar accuracy [2], [4], [5].
Original language | English |
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Title of host publication | 2023 IEEE International Solid-State Circuits Conference, ISSCC 2023 |
Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
Pages | 358-360 |
Number of pages | 3 |
ISBN (Electronic) | 9781665428002 |
DOIs | |
Publication status | Published - 2023 |
Event | 2023 IEEE International Solid-State Circuits Conference, ISSCC 2023 - Virtual, Online, United States Duration: 19 Feb 2023 → 23 Feb 2023 |
Publication series
Name | Digest of Technical Papers - IEEE International Solid-State Circuits Conference |
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Volume | 2023-February |
ISSN (Print) | 0193-6530 |
Conference
Conference | 2023 IEEE International Solid-State Circuits Conference, ISSCC 2023 |
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Country/Territory | United States |
City | Virtual, Online |
Period | 19/02/23 → 23/02/23 |
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.