| Autor: |
Teruki Someya, Vincent van Hoek, Jan Angevare, Sining Pan, Kofi Makinwa |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
IEEE Solid State Circuits Letters, 5 |
| ISSN: |
2573-9603 |
| DOI: |
10.1109/lssc.2022.3222578 |
| Popis: |
This letter describes an NPN-based temperature sensor that achieves a 1-point trimmed inaccuracy of ±0.15 °C (3σ) from -15 to 85 °C while dissipating only 210 nW. It uses a dual-mode frontend to roughly halve the power consumption of conventional frontends. First, two NPNs are used to generate a well-defined PTAT bias current, then this current is sampled and applied to the same NPNs to generate well-defined PTAT and CTAT voltages. These voltages are then applied to a low-power tracking ΔΣ modulator-based ADC, which employs a digital filter to efficiently generate a multibit representation of temperature. A prototype fabricated in a 180-nm BCD process achieves 15-mK resolution in a 50 ms conversion time, which translates into a state-of-the-art resolution FoM of 2.3 pJK2. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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