Zipp P, Ahrens H
J Biomed Eng. 1979 Oct;1(4):273-6. doi: 10.1016/0141-5425(79)90165-1.
Motion artefact voltages result from mechanical disturbances of bioelectrodes. For dry electrodes the effect of parameters related to the amplifier input stage on the artefact voltage is studied. The results indicate that the artefact voltage consists of two components termed delta R component and delta U component according to the motion-affected element. The delta R component is strongly dependent on the amplifier input resistance Rl and the input bias current lB. For negligible delta R artefacts Rl should be larger than 1 G omega and lB should be less than 50 pA when using bioelectrodes.
运动伪影电压是由生物电极的机械干扰产生的。对于干电极，研究了与放大器输入级相关的参数对伪影电压的影响。结果表明，根据受运动影响的元件，伪影电压由两个分量组成，称为ΔR分量和ΔU分量。ΔR分量强烈依赖于放大器输入电阻Rl和输入偏置电流lB。当使用生物电极时，对于可忽略的ΔR伪影，Rl应大于1 GΩ，lB应小于50 pA。
