Design of transistor amplification circuit for SEMG signal processing

Abstract

Nowadays, science and technology have penetrated the medical field and played an indispensable role. The main purpose of this paper is to research Surface Electromyography (SEMG) signal processing systems. During the research, the article firstly presented a flowchart of SEMG signal processing. And then, the emphasis was placed on the studying of signal amplification operation in the process. In order to demonstrate how this process achieves amplification, the article designs a simple amplification circuit in the second part. At the same time, its working principle was analyzed from the perspective of the basic component transistor. Finally, the article concludes that the SEMG signal processing system is a progressive process. Every step of it is very important. On the other hand, amplification operation is essential, and the amplifier circuit constructed by the NPN Bipolar Junction Transistor can achieve signal amplification. Different amplification factors can be achieved by adjusting the internal variable resistance of the circuit. This paper not only introduces readers to the processing process of SEMG signals, but also tells them how to design an amplifier for SEMG signal amplification. The author wants to tell readers that combining the theoretical knowledge with practical application is very meaningful.