The meter input resistance should be much higher than the source resistance.
仪表的输入电阻应当远远大于源的内阻才能满足对测量准确度的要求。
The fundamental limit to measurement is Johnson noise in the source resistance.
对测量的基本限制是源电阻中的约翰逊噪声。
The effective source resistance includes the device under test as well as the measurement instrument.
电阻包括被测设备和测量仪器两个方面。
As shown in Figure 2-2, the input bias current (IBIAS) develops an error voltage across the source resistance (RS).
如图2 - 2所示，输入偏置电流(IBIAS)在源电阻(RS)上产生了误差电压。
For example, if the desired accuracy is 1%, then the meter resistance must be more than 100 times the source resistance.
例如，如果希望的准确度为1%，那么表的输入电阻必须比源的电阻高100倍。
After the bandwidth and temperature, the remaining factor in determining the system noise is the effective source resistance.
讨论了带宽和温度以后，决定系统噪声的另一个因素就是等效源电阻。
The effective resistance is the parallel combination of the source resistance and the feedback (or shunt) sensing resistance.
有效电阻为源电阻和反馈(或分流)取样电阻的并联组合。
Table 2-3 summarizes minimum recommended source resistance values for various measurement ranges for a typical feedback ammeter.
表2-3给出了典型的反馈安培计在各种测量范围内最小的源电阻推荐值。
Johnson noise may be reduced by lowering the temperature of the source resistance and by decreasing the bandwidth of the measurement.
降低源电阻的温度、减小测量的带宽可以降低约翰逊噪声。
Noise can seriously affect sensitive current measurements. This section discusses how source resistance and source capacitance affect noise performance.
噪声能够严重地影响灵敏的电流测量工作。本节讨论源电阻和源电容如何影响噪声的性能。
The previous equations suggest several means for reducing Johnson noise. It might be possible to reduce the bandwidth, the source temperature, or the source resistance.
上述公式给出了降低约翰逊噪声的几种方法，即可以减小带宽、降低源的温度或者降低源电阻。
The source resistance of the DUT will affect the noise performance of a feedback ammeter. As the source resistance is reduced, the noise gain of the ammeter will increase.
DUT的源电阻会影响反馈安培计的噪声性能。源电阻降低，安培计的噪声增益就增加。
Although input bias current is a common source of this type of error, currents generated by external circuits can also result in errors due to voltage drops across the source resistance.
虽然输入偏置电流是这种误差的常见来源，但是外电路产生的电流在源电阻上形成的电压降也能引起误差。
Cross Talk between parallel Microstrip lines due to Electric Field coupling for different R-C values Compared with weak coupling and zero source resistance assumption in the culprit circuit.
弱耦合及干扰源为零电源电阻与其他情况下平行微带线间电场耦合之串音比较。
An additional advantage of this connection is that input resistance approaches infinity as the capacitor C1 approaches full charge, eliminating errors due to loading of the source resistance.
上面这个电路的另一个优点在于，当电容c1充电完毕后，输入电阻将趋于无穷大，因此可以消除因信号源内阻产生的误差。
Just a natural source of resistance taken from the very part of Ethiopia where people were suffering from starvation.
这就是一种天然的抗体源，恰好取自于人们正遭受饥饿的埃塞俄比亚那块地方罢了。
In my quest to recruit internal customers for the Rational Application Developer code analysis and inspection tool, I encountered resistance from a surprising source: my own development team.
在我寻找分析RationalApplication Developer的代码和检查工具的内部客户的过程中，我遇到了来自一个令人惊奇的抵抗源：我自己的开发团队。
It is the unique source of human assertiveness and aggressiveness as well as the source of resistance to the aggression of others.
这是人类魄力与进取的特殊泉源，但同时也是，抵制他人进犯的由来。
Never before have the tools and strategies been in place to attempt to stop the emergence and spread of drug resistance at its source.
以前从未有过力图从根源上制止耐药性的出现和传播的手段和战略。
Also, with an adjustable voltage source, the voltage dependence of the resistance under test can be obtained directly.
而且，使用可调的电压源，还可以直接得到被测电阻对电压的依赖关系。
Any external shunt resistance across the voltage source will attenuate the measured voltage, as shown in Figure 2-3.
跨接在电压源上的任何外部分流电阻都会使测量的电压衰减，如图2 - 3所示。
If using a separate current source and voltmeter to make low resistance measurements, each instrument must be checked for non-ohmic contacts.
如果使用分离的电流源和电压表来进行低电阻测量，则必须检查每台仪器的非欧姆接触情况。
High resistance measurements using the constant-current method may be made using either an electrometer voltmeter and current source or just an electrometer ohmmeter.
采用恒流法，可以使用静电计电压表和电流源或者只使用静电计欧姆计来测量高电阻。
Notice that this is a two-wire resistance measurement compared to using the electrometer voltmeter and external current source, which can make a four-wire measurement.
注意，这种测量方法是两线电阻测量，而使用静电计电压表和外部电流源则可以进行四线测量。
When switching a voltage source to multiple devices, it may become necessary to compensate for voltage drops due to switch resistance.
在将一个电压源切换至多个装置时，则可能必须补偿由于开关电阻引起的压降。
This paper introduces a new solution of equivalent resistance of one port net containing controlled source.
介绍了含受控源单口网络的等效电阻的一种求法。
Cable leakage resistance is a common source of shunt resistance loading, as shown in Figure 2-4.
分流电阻负载通常是由电缆泄漏电阻引起的，如图2 - 4所示。
Some electrometers and picoammeters, however, have a built-in voltage source and are capable of measuring the resistance directly.
然而，有的静电计和皮安计内部装有电压源，能够直接测量电阻。
Some electrometers and picoammeters, however, have a built-in voltage source and are capable of measuring the resistance directly.
然而，有的静电计和皮安计内部装有电压源，能够直接测量电阻。
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