JSSC 2013第11期RF & Wireless180nm

180-nm CMOS Wideband Capacitor-Free Inductively Coupled Power Receiver and Charg

180纳米CMOS无电容宽带电感耦合功率接收器，提升无线微系统能量接收效率。

30-mV信号接收, 82%峰值效率, 76%平均效率, 100–150 kHz工作频率

无线能量传输CMOS接收器无电容设计电感耦合低电压工作

▸创新点1：移除传统二极管桥结构，采用新型整流技术，显著降低最小工作电压至30mV，解决了低耦合系数下能量接收的难题，属于电路创新。

▸创新点2：无需外接谐振电容，通过优化接收线圈和电路设计，实现宽频带（100-150kHz）能量接收，减少了系统体积和成本，属于系统创新。

▸创新点3：在极低耦合系数（k=0.0046）和较大线圈距离（11.35mm）下，仍能保持高达82%的峰值效率和76%的平均效率，展现了卓越的能量传输性能，属于方法创新。

▸创新点4：采用180nm CMOS工艺实现，具有高集成度和低功耗特性，适合微型化无线微系统应用，属于工艺创新。

Abstract

Wireless microsystems like biomedical implants and embedded sensors derive energy from tiny in-package sources that, unfortunately, exhaust easily, which means that operational life is short. Periodically coupling power wirelessly is one way of replenishing onboard batteries, except that small receiver coils suffer from low coupling factors and induce low electromo- tive-force voltages. Today, receivers store and resonate incoming energy between the receiving coi l and an off-chip capacitor unti