Pallás-Areny R, Webster J G
Department of Electrical and Computer Engineering, University of Wisconsin-Madison 53706.
IEEE Trans Biomed Eng. 1993 Aug;40(8):830-3. doi: 10.1109/10.238470.
We analyze the input impedance and CMRR requirements for an amplifier for bioimpedance measurements when considering the capacitive components of the electrode-skin contact impedance. We describe an ac-coupled instrumentation amplifier (IA) that, in addition to fulfilling those requirements, both provides interference and noise reduction, and yields a zero phase shift over a wide frequency band without using broadband op amps.
当考虑电极 - 皮肤接触阻抗的电容性元件时，我们分析了用于生物阻抗测量的放大器的输入阻抗和共模抑制比（CMRR）要求。我们描述了一种交流耦合仪表放大器（IA），该放大器除了满足这些要求外，还能减少干扰和噪声，并且在不使用宽带运算放大器的情况下，在很宽的频带上产生零相位偏移。
