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JSSC 2023第8期Digital Circuits0.18-µm CMOSNeural Network Accelerator

Fully Integrated Frequency-Tuning Switched-Capacitor Rectifier for Piezoelectric

提出首个全集成同步电荷提取接口,提升能量提取效率和输出功率。
最大输出功率提升率8.14×,带宽提升405%
全集成同步电荷提取能量提取效率最大功率点跟踪压电能量采集
创新点1:无外部被动元件和最小化片上电容(系统创新)。通过全集成设计消除外部组件依赖,采用多步软充电技术将片上电容减少至业内最小,显著降低系统体积和成本。
创新点2:多步软充电技术减少能量提取损耗(电路创新)。通过分阶段软充电策略降低开关导通损耗,提升能量提取效率至最优水平,具体实现405%带宽提升。
创新点3:正电流选择器实现数字整流(方法创新)。提出新型数字整流架构,利用PCS消除传统模拟整流器的阈值损失,使输出功率提升率达8.14倍(VD=0.12V时)。
创新点4:自动相位/幅度调谐实现宽频MPPT(系统创新)。结合SECE策略开发自适应调谐算法,突破PEH自然带宽限制,动态追踪最大功率点。
Abstract
This article proposed the first fully integrated syn- chronous electric-charge extraction (SECE) interface, featuring: 1) no external passive components and the smallest normalized on-chip capacitance; 2) an increased energy-extraction efficiency; and 3) a maximized extracted power regardless of the input and output conditions. With the multi-step soft-charging (MSC) technique relaxing energy-extraction conduction loss, we can effectively minimize the on-chip capacitance while improving the ener