【摘要】 从理论上和工艺上阐述提高智能医疗仪器整机电气性能指标的方法,以美国AAMI标准为根据,结合智能医疗仪器的特点,着重讨论用自举电路大幅度提高仪器输入阻抗;适当选用仪器运算放大器,设计中心频率可调的电子陷波器等方法提高共模抑制比;合理设计级间耦合电路以改善频率特性;减少仪器各部件之间的分布电容以降低仪器的机箱漏电流和患者漏电流等有效方法。更多还原

【Abstract】 Some effective methods for improving or enhancing the electrical performance of medical instrumetals contolled by computers are discussed. Such as to increase the input impedance by designing bootstrap circuit of amplifier buffer, to enhance common mode rejection rate by selecting proper instrumentation amplifier and designing special band-rejection filter whose central frequency can be adjusted conveniently, to improve frequency characteristic by designing coupling circuits and low-pass filters properly, and to lower the case leakage current and patient leakage current by decreasing distributed capacitance between components of the medical instrument.更多还原