Abstract
Energy efficiency and accuracy are important specifications of CMOS temperature sensors. BJT -based sensors achieve state-of-the-art accuracy [1], while Wheatstone-bridge (WhB) sensors achieve lower accuracy but state-of-the-art energy efficiency [2], [3]. This paper presents a WhB sensor that is read out by an energy-efficient continuous-time delta-sigma modulator (CTDSM). Compared to [2], [3], the modulator achieves better energy efficiency with the help of a return-to-CM (RCM) DAC and an OTA with a tail-resistor linearization scheme. Moreover, better accuracy is achieved by embedding the DAC in the bridge and by using more sensitive silicided-diffusion resistors instead of silicided-poly resistors. Compared to the state-of-the-art [3], the proposed sensor achieves a 2× improvement in resolution FoM (10fJ.K2), and a 2× improvement in inaccuracy (0.4° C(3σ) from -55° C to 125°C after a 1-point trim).
| Original language | English |
|---|---|
| Title of host publication | 2020 IEEE International Solid-State Circuits Conference, ISSCC 2020 |
| Publisher | IEEE |
| Pages | 68-70 |
| Number of pages | 3 |
| ISBN (Electronic) | 978-1-7281-3205-1 |
| ISBN (Print) | 978-1-7281-3206-8 |
| DOIs | |
| Publication status | Published - 2020 |
| Event | 2020 IEEE International Solid-State Circuits Conference, ISSCC 2020 - San Francisco, United States Duration: 16 Feb 2020 → 20 Feb 2020 |
Conference
| Conference | 2020 IEEE International Solid-State Circuits Conference, ISSCC 2020 |
|---|---|
| Country/Territory | United States |
| City | San Francisco |
| Period | 16/02/20 → 20/02/20 |
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.
