Signal amplification unit and motion evoked potential detection device based on single power supply

The invention discloses a signal amplification unit and a motion evoked potential detection device based on a single power supply, and relates to the technical field of medical instruments, the signal amplification unit comprises a voltage division module and a signal amplification module, the voltage division module is used for dividing an input power supply voltage into a reference voltage; and the signal amplification module is connected with the voltage division module, and the signal amplification module is powered by a single power supply so as to convert and amplify an input motor evoked potential signal according to the reference voltage to obtain a common-mode amplification signal. According to the signal amplification unit disclosed by the invention, the power supply cost of the motor evoked potential detection device can be saved, a weak motor evoked potential signal can be stably amplified, and relatively good signal amplification performance and effect are realized. 本发明公开了一种信号放大单元及基于单电源的运动诱发电位检测装