A Single-Inductor-Based High-Voltage Transmit Beamformer for Wearable Ultrasound Devices Achieving 88% fCV2 Power Reduction

📋 论文概要

该论文提出了一种基于单电感的高压发射波束形成器，用于可穿戴超声设备，旨在实现低功耗、紧凑的癫痫治疗系统。通过创新的功率管理技术，实现了88%的fCV2功率降低，显著提升了能效。

💡 主要创新点

• 提出单电感结构实现高压发射波束形成，减小芯片面积并降低复杂度。
• 通过优化驱动方案，将传统fCV2功率损耗降低88%，大幅提升能效。
• 面向可穿戴超声神经刺激应用，实现紧凑、低功耗的集成方案。

🏷 关键词

📄 原文摘要

Compared to its implant-based electrical counterpart, ultrasonic vagus nerve stimulation alters neuronal activity through mechanical ultrasound waves, emerging as a promising non-invasive therapy for managing drug-resistant epilepsy [1]. To enable immediate intervention following seizure detection, a low-power, compact wearable device is sought to send continuous low- or medium-intensity focused ultrasound waves to targeted areas, such as the cervical vagus nerve (Fig. 35.1.1). The integration of transducer arrays and ASICs supporting high-voltage (HV) pulsing enables on-chip electrical transmit (TX) beamforming with sufficient acoustic pressure at the focal spot and allows for the miniaturization of such devices, but it also poses challenges in power consumption. A conventional class-D pulser (Fig. 35.1.1) exhibits excessive fCV2 power loss due to the charging and discharging of the transducer’s capacitance. A resonant pulser, in contrast,

👥 作者与机构

Peng Guo, Zu-Yao Chang, Michiel A. P. Pertijs, Tiago L. Costa

Delft University of Technology, Delft, The Netherlands