Chip compatible with neural signal measurement and stimulation functions and brain-computer interface equipment

Abstract

The invention belongs to the technical field of chips, and provides a neural signal measurement and stimulation function compatible chip and brain-computer interface equipment, a plurality of constant-current stimulation modules generate a plurality of neural stimulation signals, the neural stimulation signals are output to neural signal electrodes through a plurality of electrode ports, and the neural signal electrodes collect neural electric signals. The plurality of fixed gain amplification modules amplify the neuroelectric signals to obtain nerve sampling gain signals, and the plurality of action potential gain amplification modules filter action potential signals from each path of nerve sampling gain signals; the plurality of local field potential gain amplification modules respectively filter out local field potential signals from each path of neural sampling gain signals, the multi-path selection module selects one of the signals to output, and finally the analog-to-digital conversion module and the digital control module output corresponding digital sampling signals in sequence, so that the energy consumption and noise of signal acquisition can be reduced, and the signal acquisition efficiency is improved. Therefore, signal acquisition of the action potential and the local field potential is realized in a low-energy-consumption and low-noise scene.

Description

technical field [0001] The application belongs to the field of chip technology, and in particular relates to a chip and a brain-computer interface device compatible with nerve signal measurement and stimulation functions. Background technique [0002] At present, many brain-computer interface researches are carried out in a closed-loop direction, which not only needs to detect neuron signals, but also realizes the stimulation of nerve tissue at the same time, so as to achieve the purpose of restoring certain nerve functions, so it has very high clinical value. Due to the large differences in the acquisition bandwidth, gain, current stimulation size, and duration required by the brain-computer interface for the stimulation of different objects and different parts, it is required that the relevant parameters of the chip should have a large working range, so that it can Adjust each parameter according to the current usage scenario, so as to achieve universality. [0003] At pr...

AI Technical Summary

Problems solved by technology

[0003] At present, the measurement and stimulation of neural electrical signals usually use the RHS2116 chip of the American Intan Company. However, the existing application chips for the measurement and stimulation of nerve electrical signals cannot realize action potential (Action potential, action potential signal) and local field potential (Local field) in low energy consumption and low noise scenarios. Potential, local field potential signal) signal acquisition problem

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