一种全集成高效率多通道神经电刺激电路  

A Fully Integrated High Efficiency Multi-Channel Neural Electrical Stimulation Circuit

作　　者：刘静[1] 张轩 姚镭 Liu Jing;Zhang Xuan;Yao Lei(School of Microelectronics,Shanghai University,Shanghai 201899,China;Shanghai Mtrix Technology Co.,Ltd.,Shanghai 201899,China)

机构地区：[1]上海大学微电子学院,上海201899 [2]上海矩智科技有限公司,上海201899

出　　处：《半导体技术》2023年第9期764-769,786,共7页Semiconductor Technology

基　　金：国家重点研发计划资助项目(2021YFB3200600)。

摘　　要：设计了一种超低待机功耗、高效率的16通道高压神经电刺激集成电路(IC)。该电路主要包括1个基于串-并联电荷泵的高压产生模块,以及1个16路独立配置的通道输出驱动电路模块。高压产生模块将输入的1.65 V低压域电压转换为高压域电压6.6、9.9、13.2 V;通道输出驱动电路根据设定的刺激电流和电极负载情况动态选择合适的高压域电压以提高电刺激效率。经测试,在1.65 V输入电压和3.3 V电源电压下,该电路待机时静态功耗约为7.6 nW,由待机至电刺激电路工作切换时间小于36 ns,电荷泵输出最大电压可达12.7 V,约为电源电压的4倍,通道控制电路能输出最高1 mA的刺激电流。与传统的固定电源电压电刺激电路相比,消耗的能量最高减少了76.9%。A 16-channel high voltage neural electrical stimulation integrated circuit(IC) with ultra-low standby power consumption and high efficiency was designed.The circuit mainly consists of a high voltage generation module based on a series-parallel charge pump,and a 16-independent configuratin channel output driving circuit module.The high voltage generation module converts the input low voltage of 1.65 V into high voltages of 6.6,9.9 and 13.2 V,and the channel output driving circuit dynamically selects the appropriate high voltage according to the setting stimulation current and electrode load to improve the electrical stimulation efficiency.The measurement results show that under an input voltage of 1.65 V and a power supply voltage of 3.3 V,the proposed circuit has a static power consumption of approximately 7.6 nW in standby,a switching time of less than 36 ns from standby to stimulation circuit operation.The maximum output voltage of the charge pump reaches 12.7 V,about 4 times of the power supply voltage,and the channel control circuit can output a stimulating current of up to 1 mA.Compared to the conventional electrical stimulation circuit with fixed power supply voltage,the maximum energy consumed is reduced by 76.9%.

关 键 词：电刺激电路 高压 多通道 高效率 超低静态功耗 集成电路(IC) 

分 类 号：TN78[电子电信—电路与系统] TN432