电流

It has been proved that induced voltage causes acurrent to flow in opposition to the force producing it.

已经证明，感应电压使电流的方向与产生电流的磁场力方向相反。

The results show that the increase of the surface charge can exhaust the two-dimensional electron gas, and reduce the current collapse effect and saturation current, inducing the abnormal shift of the knee voltage.

研究结果显示表面电荷的增加能够耗尽二维电子气，减弱电流坍塌效应，降低饱和电流，使膝点电压非正常后移。

The zero-sequence current will change when the inductance of arc-suppression coil is changed.

该方法通过改变消弧线圈电抗值，从而引起线路上各点的零序电流模值发生变化，根据零序电流模值的变化特性来判断故障位置。

The oscillator circuit of detecting leak current is designed, with which the inductance of detection coil is converted to frequency of oscillatory signal, and the oscillatory signals are used to eliminate the residual magnetism in coil after removal of leak direct current.

所设计的检测电路把敏感线圈电感的变化转换成振荡信号频率的变化，实现了对直流泄漏电流的精确检测，且交变振荡信号又能有效地消除敏感线圈中直流电流引起的剩磁现象。

In this circuit, sensing resistor and senseFET were used to sense the inductor's current.

1引言电感电流的检测在电流模PWM DC-DC转换器中发挥着重要的作用。

Current tuning is introduced, and the speed open-loop transfer function is established based on current closed-loop. A mathematical inequation about the speed open-loop transfer function is deduced, then the measured amplitude-frequency data is introduced in the inequation, thus the mathematic expressions about moment of inertia and mechanism time constant are obtained.

引入了电流校正环节，建立了基于电流闭环的速度开环传递函数，推导了关于该速度开环传递函数的数学不等式，再将实际测得的幅频特性代入此不等式中，得到了关于转动惯量和机械时间常数的数学表达式。

Electrometers are known for their low input bias current, which is usually a few femtoamps.

静电计以低输入偏置电流而闻名，其输入偏置电流通常在几个飞安。

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。

The driver stage function obtains enough high voltage amplification factor, as well as the output stage provides enough big drive current, for this reason, may use the belt collection electricity level altogether to shoot the amplifying circuit, its static bias current ratio input level must be big.

推动级的作用是获得足够高的电压放大倍数，以及输出级提供足够大的驱动电流，为此，可采用带集电级的共射放大电路，其静态偏置电流比输入级要大。

aining at high impedance weak signal measurement,the relations among measuring precision,input impedance and input bias current,the guard technology is applied to design a measuring circuit with guard circuit,adding a guard potential to low-impedance nodes of circuit,the effect of leakage current is reduced.using spice simulation and validates that guard circuit can increase the input impedance of the system and lower the input bias current,the results show that the guard circuit provids a valuable solution for high accuracy measurement of the high impedance weak signal.

摘 要：针对高阻抗微弱信号测量问题，对测量精度与系统输入阻抗、输入偏置电流的关系进行分析，应用保护技术设计了带保护电路的测量电路，将电路中的低阻抗节点加上保护电势，减小漏电流的影响。通过pspice仿真分析，验证保护电路能提高测量系统的输入阻抗和降低输入偏置电流，结果表明保护电路技术能实现对高阻抗微弱信号的高精度测量。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。