1·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。
2·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。
3·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。
4·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。
5·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。
6·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。
7·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。
8·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。
9·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。
10·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。