A biosignal acquisition system boased on USB is introduced. The interface circuit of USB and the principle of communication are described in detail and the program are also provided.

• 摘要本文介绍一种用USB接口实现生理信号采集的方案。给出了上下位机之间的USB接口电路，并详细说明了通信控制原理及程序实现的方法。