Burke M J, Gleeson D T
Department of Electronic and Electrical Engineering, University of Dublin, Trinity College, Republic of Ireland.
IEEE Trans Biomed Eng. 2000 Feb;47(2):155-62. doi: 10.1109/10.821734.
This paper describes the development of a very low-power preamplifier intended for use in pasteless-electrode recording of the human electrocardiogram. The expected input signal range is 100 microV-10 mV from a lead-II electrode configuration. The amplifier provides a gain of 43 dB in a 3-dB bandwidth of 0.05 Hz-2 kHz with a defined high input impedance of 75 M omega. It uses a driven common electrode to enhance rejection of common-mode interfering signals, including low-frequency motion artifact, achieving a common-mode rejection ratio (CMRR) of better than 80 dB over its entire bandwidth. The gain and phase characteristics meet the recommendations of the American Heart Association, ensuring low distortion of the output ECG signal and making it suitable for clinical monitoring. The amplifier has a power consumption of 30 microW operating from a 3.3-V battery and is intended for use in small, lightweight, portable electrocardiographic equipment and heart-rate monitoring instrumentation.
本文描述了一种超低功耗前置放大器的研发，该前置放大器旨在用于无粘贴电极记录人体心电图。预期输入信号范围为来自II导联电极配置的100微伏至10毫伏。该放大器在0.05赫兹至2千赫兹的3分贝带宽内提供43分贝的增益，具有75兆欧的规定高输入阻抗。它采用驱动公共电极来增强对共模干扰信号的抑制，包括低频运动伪影，在其整个带宽内实现了优于80分贝的共模抑制比（CMRR）。增益和相位特性符合美国心脏协会的建议，确保输出心电图信号的低失真，使其适用于临床监测。该放大器由3.3伏电池供电，功耗为30微瓦，旨在用于小型、轻便的便携式心电图设备和心率监测仪器。
