This system uses the battery as supply power, and adopts instrumentation amplifier wtih high performance as preamplifier, so that we can improve the CMRR and input impedance, and decrease the line frequency noise effectively.

• 本系统由电池供电，采用高性能的仪表放大器进行前置放大，以提高共模抑制比和输入阻抗，有效抑制工频干扰。