picoammeter
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例句
The measured current is usually quite small, so a picoammeter or electrometer is often required to make the measurement.
测得的电流通常非常小，因此往往需要使用皮安计或静电计进行测量。
The main advantage of a logarithmic picoammeter is its ability to follow current changes over several decades without range changing.
对数皮安表的主要优点是能够在几个数量级的范围内跟踪电流的变化，而无须改变量程。
In such an arrangement, CIN doesn't shunt RFB, and has only a fraction of the effect it would have with a shunt picoammeter.
在这种情况下，CIN不会对RFB分流。其影响与分流皮安计的情况相比是很小的。
The low input voltage drop (voltage burden) of such a picoammeter keeps the anode at virtually ground potential.
皮安计具有很低的输入电压降（输入端压降），这就使得阳极实际上处于地电位。
Since the voltage burden of the electrometer ammeter or picoammeter is less than 1mV, the diodes won't conduct.
由于静电计、安培计或皮安计的输入端压降小于1mV，这两个二极管不会导通。
Two general types of connectors are used for electrometer, picoammeter, and SMU measurements.
静电计、皮安计和SMU的测量工作中使用两种通用类型的连接器。
A basic approach to high speed measurements is to minimize stray shunting capacitance through careful mechanical design of the picoammeter.
实现高速测量的基本方法是，仔细地进行皮安表的机械设计以尽量减少寄生并联电容。
Note the top electrode is guarded, so that only current flowing across the insulator is measured by the picoammeter.
注意，顶部的电极接保护，所以只有流经绝缘体表面的电流才为皮安计所测量。
If this is the case, a simple coaxial vacuum feedthrough can be used to make connections from the collector to the picoammeter.
在这种情况下，可以使用简单的真空同轴接头来进行从收集电极到皮安计的连接。
Rise time in a feedback picoammeter is a function of the physical or stray capacitance shunting the feedback resistance (RFB).
反馈型皮安计的上升时间是反馈电阻（RFB）上并联的物理电容或寄生电容的函数。
To avoid measurement errors, it's critical to make proper connections from the electrometer, SMU, or picoammeter to the device under test.
为了避免测量误差，关键之点在于将静电计、SMU或皮安计和被测装置进行适当的连接。
The basic configuration of the constant-voltage method using an electrometer or picoammeter is shown in Figure 2-30a.
使用静电计和皮安计的恒压法的基本电路配置如图2-30a所示。
The resulting speed-up comes from the reduction of the input impedance of the picoammeter due to negative feedback.
速度提高的原因是由于负反馈的作用使皮安计的输入阻抗降低。
The picoammeter reads the current at the last dynode, which is equal to the anode current minus the current flowing to the previous dynode.
皮安计在最后一个倍增管电极处读取电流，此电流等于阳极电流减去流过前一个倍增管电极的电流。
The voltage across RL1 is the picoammeter voltage burden, normally less than one millivolt, so the resulting current will be quite small.
RL1上的电压为皮安计的输入端压降，通常小于1mV，所以产生的电流是相当小的。
Figure 2-24 shows a protection circuit for an electrometer ammeter or picoammeter, consisting of a resistor and two diodes (1N3595).
图2-24示出静电计或皮安计的过载保护电路，其中包括一个电阻器和两个二极管（1N3595）。
Given that the offset current may be hundreds of picoamps or less, an electrometer or picoammeter is required to measure it.
给出的偏移电流技术指标可能为几百皮安或更小，需要利用静电计或皮安计进行测量。
With this connection method, the picoammeter reads a negative current.
采用这种连接方法时，皮安计读出的电流为负值。
Second, the diode minimizes the picoammeter noise introduced when measuring capacitors of 1nF or greater.
第二，在测量1nF或更大的电容器时，二极管将皮安计的噪声降至最低。
Note that before the capacitor is switched to the picoammeter, the capacitor is connected to circuit LO.
请注意，在电容器被切换至皮安计之前，它是被连接到电路LO的。
The picoammeter is commonly used as a readout because of its high sensitivity.
由于皮安计具有很高的灵敏度，所以通常用作阳极电流的读出装置。
Figure 4 - 16 shows a Model 6485 Picoammeter measuring the current from the ion collector, which is operating at ground potential.
图4-16示出6485型皮安计从离子收集电极测量电流的情况，这时仪器工作在地电位。
