当前位置:首页>南京>南京大学团队开发出面向侵入式脑机接口的高能效无线能量接收芯片

南京大学团队开发出面向侵入式脑机接口的高能效无线能量接收芯片

  • 2026-05-12 01:13:44
南京大学团队开发出面向侵入式脑机接口的高能效无线能量接收芯片

近日,南京大学电子科学与工程学院施毅教授/邱浩副教授团队在无线能量传输技术的研究取得重要进展。

侵入式脑机接口需长期工作于人体内部,受限于生物安全性与密闭生理环境,设备无法依赖物理导线供电,必须采用无线供能技术。同时,其紧凑的封装结构严重制约了散热能力,芯片功耗转化的热量若无法及时导出,不仅会导致电路性能衰退,还可能引发器件失效甚至周围组织热损伤。因此,最大限度提升能量转换效率、降低自身热耗散成为电源管理设计的核心诉求。在此背景下,单级可调压双输出整流技术因能兼顾微型化体积与高能效,被视为实现侵入式设备长效、安全供能的理想方案,近年来备受学界关注。

图1侵入式脑机接口无线供电系统架构示意图

然而,该技术目前仍面临三大挑战:一是传统架构多采用时分复用或半波整流,有效充电窗口受限,致使输出功率与转换效率偏低;二是多路输出难以实现独立精准稳压,现有拓扑常因电压耦合或滞回控制失配导致纹波超标;三是普遍依赖PMOS有源二极管,其显著的导通与开关损耗在微型侵入场景下易引发局部发热,降低系统可靠性。因此,如何在严苛的体积与热约束下,同时实现高能量转换效率、低输出纹波、双路独立稳压整流,已成为突破侵入式脑机接口长效、安全供能的核心难题。

针对上述问题,研究团队提出了一种新型高效率单级双输出稳压整流器拓扑,可在半周期内同时为双输出进行充电,突破了传统设计中时间复用模式的限制,显著提升负载功率、供电电压质量和能量转换效率。进一步,提出的创新型电荷分配模式,能够有效缓解双输出负载条件失衡导致问题,通过自适应优化多输出端间电荷分配,有效拓宽了额定输出电流范围,显著提升了电路的稳定性和适应性。

图2 单级可调压双输出整流电路架构示意图

该芯片采用0.18 μm CMOS工艺进行了流片验证,实测结果表明,测试结果表明:在稳态情况下,实现了92.2%的峰值效率和131mW的峰值负载功率,双输出电压分别稳定在3.3V和1.6V,对应的最大纹波电压控制在50mV和75mV;在大负载切换(×15)情况下,实现高速响应的同时避免了双输出之间的耦合干扰。多个核心指标刷新了国际报道相关工作的最高记录。

图3 整流芯片照片与瞬态测试、效率测试结果

相关成果于04月16日以“A 6.78-MHz single-stage regulating rectifier with dual outputs simultaneously charged in a half cycle achieving 92.2 % efficiency and 131 mW output power”为题在线发表于集成电路顶刊IEEE Journal of Solid-State Circuits (JSSC)。电子科学与工程学院2024级博士生庄泉荣是论文的第一作者,邱浩副教授和施毅教授是论文的共同通讯作者,IBM托马斯∙J∙沃森研究中心的张信研究员对该工作进行了指导。研究得到了国家自然科学基金重点项目、首批海外优青项目、面上项目、创新研究群体项目等的资助,以及光电材料与芯片技术教育部工程中心、未来智能芯片交叉研究中心的支持。

内容来源:南京大学

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  1. CONNECT:[ UseTime:0.001192s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001983s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.021770s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.002390s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000674s ]
  6. SELECT * FROM `set` [ RunTime:0.006162s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000623s ]
  8. SELECT * FROM `article` WHERE `id` = 543922 LIMIT 1 [ RunTime:0.001382s ]
  9. UPDATE `article` SET `lasttime` = 1779163295 WHERE `id` = 543922 [ RunTime:0.007511s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.002777s ]
  11. SELECT * FROM `article` WHERE `id` < 543922 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000448s ]
  12. SELECT * FROM `article` WHERE `id` > 543922 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002213s ]
  13. SELECT * FROM `article` WHERE `id` < 543922 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.020189s ]
  14. SELECT * FROM `article` WHERE `id` < 543922 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.018715s ]
  15. SELECT * FROM `article` WHERE `id` < 543922 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004248s ]
0.272309s