| Autor: |
Alessandro Catania, Francesco Gagliardi, Massimo Piotto, Paolo Bruschi, Michele Dei |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
IEEE Access, Vol 12, Pp 80009-80019 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2169-3536 |
| DOI: |
10.1109/ACCESS.2024.3409842 |
| Popis: |
This paper introduces and experimentally validates a switched-capacitor inverter-based second-order 3-tap FIR single-bit Delta-Sigma Modulator ( $\Delta \Sigma $ M) designed for nanowatt-level analog-to-digital conversion in wearable healthcare devices. The focus is on applications with energy harvesters, emphasizing continuous monitoring of chronic conditions and closed-loop drug-delivery systems. The design methodology addresses ultralow-power considerations at both architectural and transistor levels, tackling challenges like process variations without relying on complex digital calibration techniques. Experimental results from prototypes, implemented on a standard 180-nm CMOS process, reveal a peak SINAD of 77.8 dB and SNR of 79.4 dB, with a power consumption of 71.5 nW at a 900-mV supply. Measurements across nine chip samples are consistent, demonstrating low DC offset, with low temperature drift and live sensitivity. The outcomes confirm the modulator suitability for energy-harvested wearable systems. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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