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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2510.13682 |
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| _version_ | 1866915641604177920 |
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| author | Li, Jiayang Zhang, Qingyu Ha, Sohmyung Demosthenous, Andreas Jiang, Dai Wu, Yu |
| author_facet | Li, Jiayang Zhang, Qingyu Ha, Sohmyung Demosthenous, Andreas Jiang, Dai Wu, Yu |
| contents | This paper presents a fast impedance measurement IC for large-scale piezo-resistive sensor array. It features a unified differential time-to-digital demodulation architecture that readout impedance directly through the excitation circuit. The proposed pre-saturation adaptive bias technique further improves power efficiency. The chip scans 253 sensors in 12.2 ms (82 fps) at 125 kHz, consuming 158 $μ$W (7.5 nJ/sensor). With loads from 20 $Ω$ to 500 k$Ω$, it achieves 0.5% error and up to 71.1 dB SNR. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_13682 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A 0.62 $μ$W/sensor 82 fps Time-to-Digital Impedance Measurement IC with Unified Excitation/Readout Front-end for Large-Scale Piezo-Resistive Sensor Array Li, Jiayang Zhang, Qingyu Ha, Sohmyung Demosthenous, Andreas Jiang, Dai Wu, Yu Systems and Control This paper presents a fast impedance measurement IC for large-scale piezo-resistive sensor array. It features a unified differential time-to-digital demodulation architecture that readout impedance directly through the excitation circuit. The proposed pre-saturation adaptive bias technique further improves power efficiency. The chip scans 253 sensors in 12.2 ms (82 fps) at 125 kHz, consuming 158 $μ$W (7.5 nJ/sensor). With loads from 20 $Ω$ to 500 k$Ω$, it achieves 0.5% error and up to 71.1 dB SNR. |
| title | A 0.62 $μ$W/sensor 82 fps Time-to-Digital Impedance Measurement IC with Unified Excitation/Readout Front-end for Large-Scale Piezo-Resistive Sensor Array |
| topic | Systems and Control |
| url | https://arxiv.org/abs/2510.13682 |