英语高手帮我翻译一下，关于电路的。 请英语高手帮我翻译一下。
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1 Introduction
1.引言
THE USE of conventional, unsymmetrical amplifier circuits in biomedical engineering is very limited, because of their inadequacy in suppressing power-line interference.常规的不对称放大器电路在生物医学工程中的使用是有限的，因为它们在抑制电力线路的干扰上存在不足之处。 Because one of the patient electrodes is directly connected to the amplifier
signal ground and the other is a high impedance point, the interference
current flows only through the grounded electrode. 因为病人的电极中有一个直接连接到放大器信号接地，另一个是高阻抗点，所以干扰电流只流过被接地的电极。The grounded electrode impedance voltage drop is amplified and leads to circuit saturation or masking of the useful biopotential
signal. 该接地电极阻抗的电压降被放大，并导致电路饱和，或者对有用生物电位信号的掩蔽。
Many biosignal acquisition devices could benefit from the use of only two electrodes. 很多生物信号采集装置可以通过仅采用两个电极而得到好处。Electrocardiogram monitoring in intensive care wards, ambulatory monitors, defibrillators etc.
are among the most common examples. 在重症监护病房中的心电图监控、门诊监测器、除颤器等是最常见的例子。
The most widely used technique for biosignal amplification is based on an instrumentation amplifier first-stage design, because of its ability to suppress the common mode interference
(NEUMAN, 1998). 最广泛使用的生物信号放大技术是基于一种仪表放大器的一级设计，因为它能抑制共模干扰（Neuman，1998）In two－electrode instrumentation, the
amplifier inputs must have a differential impedance that is as high as possible to avoid signal attenuation. 在双电极仪器应用中，放大器的输入必须有尽可能高的差分阻抗，以避免信号衰减。On the other hand, the amplifier should have reasonably low common mode impedance, to create a path for the common mode interference
currents without significant voltage drop, keeping both inputs in their specified operating voltage range. 另一方面，放大器的共模阻抗应该合理地低，以便为共模干扰电流创造一个通路而不致有明显的电压降，从而将两个输入都保持在它们规定的工作电压范围内。
THAKOR and WEBSTER (1980) introduced a bootstrapped input stage. However, it has an inductive common mode input impedance, resulting in a very poor common mode
input current range, especially for higher frequencies. Thakor和Webster（1980）引入了一个自举（bootstapped）输入级，产生了很差的输入共模电流范围（特别是在较高的频率下）
A circuit for a two-electrode, non-differential amplifier was developed (DOBREV, 2002), the performance of which isquasi-equivalent to the differential amplifier described by DOBREV and DASKALOV (2002). Dobrev于2002年开发了一种用于双电极、无差动放大器的电路，其性能准-等效于Dobrev和Daskalov（2002）所描述的差分放大器。
Because the body as signal
source is floating and, in addition, the modern biopotential amplifiers are isolated, it is possible to drive actively one of the electrodes to the circuit common potential and thus to
balance the flowing interference currents. 因为作为信号源的人体是浮动的，而且现代的生物电位放大器是隔离的，所以有可能主动地将电极中的一个激励到电路的公共电位，并因此来平衡流过的干扰电流。
Now, a very simple, low-cost circuit of a two-electrode nondifferential
amplifier is suggested, where the interference current balancing is achieved by one operational amplifier
(OA) and two parallel RC networks.现在人们提出了一种很简单而又廉价的双电极、无差动放大器的电路，其中，干扰电流的平衡是靠一个运算放大器（OA）和两个并联的RC（阻容）网络实现的。
1简介
使用常规，在非对称放大器电路
生物医学工程是非常有限的，因为他们的不足
抑制电源线的干扰。因为其中的
病人电极直接连接到放大器
信号地面和另一种是高阻抗点，干扰
目前的流动只能通过接地电极。那个
接地电极阻抗压降是扩增和
导致电路饱和或掩盖的有益biopotential
信号。
许多biosignal采集设备可能将从中受益
使用的仅有的两个电极。心电图监测
加护病房，动态监测，除颤器等
是最常见的例子。
使用最广泛的技术biosignal扩增
基于仪表放大器第一阶段的设计，
因为它能够抑制共模干扰
（ NEUMAN ， 1998年） 。在两电极仪器组成，
放大器的输入必须有一个差分阻抗是作为
越高越好，以避免信号衰减。关于其他
另一方面，放大器应该有合理的低水平共同
阻抗模式，建立一个路径共同模干扰
电流电压下降不显着，使这两个
投入在其指定的工作电压范围。
THAKOR和Webster （ 1980 ）介绍了自举
输入阶段。然而，它有一个共同的模式归纳
输入阻抗，从而导致一个非常贫困的共同模式
输入电流范围内，特别是为更高的频率。
电路的两个电极，非差分放大器
开发（多布雷夫， 2002年） ，执行的isquasi ，相当于差分放大器所描述的
多布雷夫和达斯卡洛夫（ 2002年） 。由于身体信号
来源浮动，此外，现代biopotential
放大器是孤立的，是有可能的驱动器之一，积极
电极的电路共同潜力，从而
平衡流动的干扰电流。
现在，一个非常简单的，低成本的电路两电极不可微
放大器的建议，那里的干扰
目前所取得的平衡是一个运算放大器
（办公自动化）和两个平行的RC网络。
(仅供参考)
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