An Electrical Impedance Spectroscopy IC with a Printable, Fractal Root Textile Sensor for Perspiration Analysis
Journal
European Solid-State Circuits Conference
Journal Volume
2023-September
ISBN
9798350304206
Date Issued
2023-01-01
Author(s)
Yeh, Yung Hua
Liu, Wei Cheng
Lin, Yi Jie
Chou, Yu Siang
Huang, Yu Chiao
Chang, Min Hua
Lin, I. Te
Chen, Yen Chi
Liao, Yu Te
Abstract
This paper presents an electrical impedance spectroscopy (EIS) system-on-chip with a fractal root textile sensor for rapid sweat collection followed by sodium ion ( N a+) concentration and sweat flow rate analysis. The proposed design achieves an impedance resolution of 8.1 mΩH z at a sweeping frequency of up to 30 kHz and an output current of up to 100 μ A. The total harmonic distortion is less than 1%. The maximum detectable load impedance is 14 kΩ, while the total power consumption is 768 μ W. The proposed textile sensor and readout IC allow a N a+ concentration sensitivity of 2.5 code/mM and a noise floor of The chip achieves a sensitivity of 2.5 code/mM and a noise floor of 0.476 μ MH z.
Subjects
concentration | electrochemical impedance spectroscopy | fractal root textile sensor | sweat flow rate
Type
conference paper