Research on Improving Amplifier Used in Brain-Computer Interface Technology

Abstract

With the rapid development of science and technology, the demand for human-computer interaction in many fields is increasing, and the requirements are getting higher and higher. As the most important part in human-computer interaction, the demand for Brain-Computer Interface (BCI) technology in medicine, games, military fields, etc. is increasing. Therefore, more and more scholars and institutions have begun to study BCI technology. In this paper, an experiment is designed to improve the performance of two-stage CMOS amplifiers, an important component of BCI technology. The experiment uses CoolSpice to build a basic model of the two-stage CMOS amplifier for simulation, replacing brain waves with a small signal, and adjusting the performance of the two-stage CMOS amplifier by adding a compensated capacitor and resistor. Through experimentation, it can be concluded that selecting an appropriate compensated capacitor can significantly improve the performance of the amplifier. Improving the performance of amplifiers can help improve the efficiency of BCI technology and help people collected the information emitted by brain waves more accurately in the future.