A miniaturized

high-quality

low-cost and portable brain-computer interface system for implantable neural signals acquisition is developed. This system mainly includes front-end neural signal acquisition module

signal conversion module

controller module

data transmission module and power management module. Besides

host computer is used to implement real-time data flow receiving and visual graphical interface. Experimental results show that the 16-channel brain-computer interface system can achieve sampling frequency of 20 kHz per channel

sampling precision of 16 bits and system input noise of 7 μV

closing to the performance of the mainstream acquisition equipment. The system meets the requirements of multi-channel

high sampling rate

high precision

and low noise neural signal acquisition for implantable brain-computer interface.