本工作基于低压标准CMOS技术，提出了一种8通道双极双相电流控制刺激集成电路。该刺激集成电路通过晶体管叠层实现高达9V的电压兼容性，并实现了无论负载阻抗如何都能可靠运行的特性。所提出的设计允许同时进行多通道刺激，而不会发生通道间串扰。采用串行外设接口(SPI)来编程该集成电路。可以产生10μA至70μA的七个刺激电流幅度级别，不准确度仅为1.73%。该集成电路采用0.18μm 1.8V/3.3V标准CMOS工艺制造，每个刺激通道的尺寸都很紧凑。通过测量结果展示了包括该集成电路和电极在内的头戴式设备，并配备了定制设计的软件用户界面。
This work presents an 8-channel bipolar biphasic current-controlled stimulation IC based on a low-voltage standard CMOS technology. The stimulation IC features the voltage compliance of as much as 9 V through transistor-stacking and achieves reliable operation regardless of the load impedances. The proposed design allows simultaneous multi-channel stimulation without inter-channel crosstalks. A serial peripheral interface (SPI) is employed to program the IC. Seven magnitude levels of the stimulation current from 10 μA to 70 μA can be generated with an inaccuracy of only 1.73%. The IC is fabricated in a 0.18-μm 1.8-V/3.3-V standard CMOS process with each stimulation channel of a compact size. A head-stage including the IC and electrodes along with a custom-designed software user-interface is demonstrated with measurement results.
