摘要
设计了一种低功耗可级联拓展的电刺激芯片,该芯片主要由16个独立电刺激通道、一个全局数字控制器(GDC)及电流偏置模块组成。每个独立电刺激通道包含一个8 bit数模转换器(DAC)、一个高压刺激前端(SFE)电路以及通道本地数字控制器(LDC),能够输出脉冲幅度/宽度/相位间隔时间可独立配置的单极性双相脉冲刺激电流。GDC控制16个通道的配置和刺激使能,并有一个可进行多芯片级联拓展的控制接口。LDC和GDC共用同一组时钟/数据控制信号,节省了端口资源。提出的电路采用GF 0.18μm CMOS BCD高压工艺进行设计和制备,总面积为1.5 mm×3.1 mm。测试结果表明,在5 V/15 V/-15 V供电下,该电路的静态功耗为2.14μW,最大输出电流为1 mA,输出200μA恒定电流时顺从电压为13.5 V。
A low-power cascade-expandable electrical stimulation circuit which mainly consists of 16 independent electrical stimulation channels,a global digital controller(GDC)and a current bias module was designed.Each independent electrical stimulation channel includes an 8 bit digital to analog converter(DAC),a high-voltage stimulation front-end(SFE)circuit and a channel local digital controller(LDC),which can output monopolar biphasic pulse stimulation currents with independently configurable pulse amplitude,width and phase interval.The GDC controls the configuration and stimulation enabling of the 16 channels and has a control interface for cascading and expanding multi-chips.The LDC and GDC share the same set of clock/data control signals,saving port resources.The proposed circuit was designed and fabricated using GF 0.18μm CMOS BCD high-voltage process,with a total area of 1.5 mm×3.1 mm.The test results show that under the 5 V/15 V/-15 V power supplies,the circuit has a static power consumption of 2.14μW,a maximum output current of 1 mA and a compliance voltage of 13.5 V at 200μA constant current output.
作者
吴黎霞
张轩
薛宁
姚镭
刘春秀
Wu Lixia;Zhang Xuan;Xue Ning;Yao Lei;Liu Chunxiu(State Key Laboratory of Transducer Technology,Aerospace Information Research Institute(AIR),Chinese Academy of Sciences,Bejing 100094,China;School of Electronic,Electrical,and Communication Engineering,University of Chinese Academy of Sciences(UCAS),Beijing 100094,China;Shanghai Mtrix Technology Co.,Ltd.,Shanghai 201899,China;Lin Gang Laboratory,Shanghai 200031,China)
出处
《半导体技术》
CAS
北大核心
2025年第1期64-70,共7页
Semiconductor Technology
基金
上海市市级科技重大专项(2021SHZDZX)
国家重点研发计划(2021YFB3200600)。
关键词
电刺激
集成电路(IC)
低功耗
可拓展性
多通道
电刺激器
electrical stimulation
integrated circuit(IC)
low-power
scalability
multichannel
electrical stimulator
作者简介
吴黎霞(2000-),女,浙江杭州人,硕士研究生,主要研究方向为植入式电刺激系统;通信作者:姚镭(1982-),男,重庆人,博士,研究员,主要研究方向为脑机接口专用集成电路与系统、高性能传感器接口集成电路与系统;通信作者:刘春秀(1976-),女,山东德州人,博士,副研究员,硕士生导师,获得北京科技奖二等奖1项、国家技术发明奖二等奖1项,主要研究方向为新型光磁生物传感器及系统,POCT检测系统和图像软件分析,微电流检测、分析软件开发及其应用。
