A Battery-Free Wireless Electrochemical-Interface SoC Featuring 143dB Dynamic Range for Multimodal Wearables
Abstract
A battery-free wireless electrochemical-interface SoC is implemented and demonstrated in a sweatband prototype for physiological monitoring in body sweat, where the proposed techniques improve the dynamic range with a high linearity and low power consumption: 1) A self-adaptive stepwise-sinking technique for an OTA-less potentiostat extends the dynamic range to 143dB with 23.3μW power. 2) A frequency-digital-hybrid structure helps to ensure a high linearity of R2=0.99997 across the 143dB range.
Fields of Study & Subjects
Analog and Mixed-Signal Circuit Design
Wireless Body Area Networks
Radio Frequency Integrated Circuit Design
Publication details
- Journal / source
- Digest of technical papers/Digest of technical papers - IEEE International Solid-State Circuits Conference
- Pages
- 376–378
- Publication date
- 15 February 2026
- Language
- EN