无线,多传感器系统在芯片上的pH和放电计,由体温提供动力
IEEE transactions on biomedical circuits and systems
|June 15, 2023
概括
这项研究引入了用于化学和生物传感器的体温驱动芯片,使低功耗,自主测量成为可能. 它使用最少的能量展示了高效的pH和葡萄糖监测,为无电池传感器系统铺平了道路.
科学领域:
- 集成电路 集成电路
- 生物医学工程 生物医学工程
- 收集能源 收集能源
背景情况:
- 化学和生物传感器需要高效的电源解决方案来持续监控.
- 现有的传感器系统通常依赖于电池,限制了它们的自主性和寿命.
- 身体热量为低功耗电子产品提供了一个可持续的,无处不在的能量来源.
研究的目的:
- 开发一种由体温驱动的多传感器芯片系统 (SoC),用于化学和生物传感器测量.
- 为了实现传感器读取的超低功耗 (<<10μW) 传感器读出.
- 为了证明无电池,动力自主传感器操作的可行性.
主要方法:
- 设计了一个多传感器SoC,集成模拟前端接口 (V-to-I,电位器) 与放松振荡器 (RxO) 读取方案.
- 包含一个与热电发电兼容的低压能源收获器.
- 在0.18微米CMOS工艺中制造了一个原型IC,用于概念验证的验证.
主要成果:
- 实现了全范围pH测量的最大功耗2.2μW,RxO仅消耗0.7μW.
- 已证明读出电路的高线性 (R2 = 0.999).
- 通过1.4微瓦的读取功率成功进行葡萄糖测量,并通过体温提供动力的无线pH数据传输.
结论:
- 开发的SoC可使用人体热量进行化学和生物传感器的高效,低功耗读取.
- 这项技术支持无电池和动力自主传感器系统的开发.
- 该方法可以适应各种传感器类型,推进可穿戴和可植入的监控解决方案.
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