一个402 MHz和1.73 VCE共振调节校正器与芯片上的天线用于生物植入物
IEEE transactions on biomedical circuits and systems
|March 3, 2025
概括
本研究介绍了用于深层组织生物植入物的集成无线电力传输系统. 这种新型整流器实现了高效率和快速过渡响应,这对于医疗器械的可靠电源供应至关重要.
科学领域:
- 电气工程 电气工程
- 生物医学工程 生物医学工程
- 集成电路 集成电路
背景情况:
- 无线电力传输 (WPT) 对生物植入物至关重要,但由于诱导合较低,深层组织植入带来了挑战.
- 现有的WPT系统经常在植入设备的效率和稳定功率调节方面扎.
研究的目的:
- 为深层组织生物植入物应用设计和评估一个完全集成的共振调节整流器 (IR3) 与芯片上的天线.
- 为了克服深层植入物中低感应合系数的局限性.
- 提高功率转换效率 (PCE) 和暂时响应,以获得可靠的生物植入器功率.
主要方法:
- 在180nm CMOS 过程中实现电压模式 IR3,并使用在芯片上的天线运行在 402 MHz.
- 使用基于充电时间的调节补偿电路来实现低输出波纹 (0.3%) 和高压转换效率 (VCE).
- 采用基于VCDL的时钟门的开启-关闭延迟补偿方案来纠正相位错误和数字控制以改善短暂响应.
主要成果:
- 在1.5mW负载下,IR3系统实现了65%的高功率转换效率 (PCE).
- 在1.8V输出电压下显示了0.3%的低波纹因子,VCE为1.73.
- 在从65μW到1.5mW的负载变化期间,实现了6.9μs的快速1%设置时间,表明了出色的短暂性能.
结论:
- 拟议的综合无线电力传输系统有效地解决了在深层组织中为生物植入物提供电力的挑战.
- 新的IR3设计同时纠正和调节功率,提高整体效率和稳定性.
- 该系统的高PCE和快速过渡响应使其成为下一代植入式医疗器械的有希望的解决方案.
相关概念视频
01:12Mesh Analysis for AC Circuits
332
In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
332
01:24Characteristics of Series Resonant Circuit
212
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
212
01:17Series Resonance
144
The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
144