The MOSFET input diode is controlled by an electric field in the gate region, thus the input impedance is always extremely high because there is no forward biased diode to lower the input impedance.
MOSFET的输入二极管是由一个电场控制在门区,因此总是输入阻抗非常高,因为没有正向偏置二极管,以降低输入阻抗。
The input impedance of a rectangular microstrip patch is discussed by this method.
利用本方法对矩形微带贴片的输入阻抗进行了讨论。
It is not in need of buffer stage for cascading because of high input impedance.
因为具有很高的输入阻抗,所以级联时不需缓冲级。
DVM usually got an input impedance of 10 Mohm. There may be loading effect when measuring high impedance circuit.
数字式电压表通常有10兆欧的输入阻抗。当测量高阻抗电路时﹐可能会有影响。
Numerical results show the effects of the lossy medium and antenna parameters on input impedance, which could be used in designing cavity-backed slot antenna.
本文的数值结果分别给出了有耗介质及天线结构参数对输入阻抗的影响,为天线设计提供了依据。
X1 probe: no attenuation, input impedance follow that of scope input impedance (usually 1 Mohm). This type of probe is seldom used because of heavy loading effect on circuit under test.
X1探头﹕没有衰减﹐输入阻抗跟示波器输入阻抗一样(通常是1兆欧)。由于对测试电路有很大的负载影响﹐所以很少使用这种探头。
When the dominant mode TE10 is propagated alone in the rectangular waveguide, expressions for the real and imaginary parts of the input impedance seen by the coaxial line are derived.
当波导只传输主模(te_(10)模)时,求得从同轴线看去的输入阻抗的实部和虚部表达式。
It is a voltage-controlled device with high input impedance, which makes it possible to control higher output power with a lower input voltage.
它具有输入阻抗高、电压控制和用低压控制大功率输出的特点。
Helical antenna has not only almost identical to the resistive input impedance in broad bandwidth, but also works by the end of super-gain front lobed map in the same frequency band.
螺旋天线不仅在宽频带上具有近乎一致的电阻性输入阻抗,而且在同样的频带上按超增益端射阵的波瓣图工作。
The results for element input impedance, radiation efficiency of space wave, directivity and radiation pattern are presented.
其结果包括阵列单元的输入阻抗、空间波辐射效率、方向性系数和辐射方向图等。
A full-scale analysis of input impedance of the operational amplifier under the state of differential input is given here.
本文对运算放大器在差动输入状态下的输入阻抗问题做了全面的分析。
And insulating ring technology is adopted to further improve input impedance influenced by insulating resistance of printed circuit board.
印刷电路板上加绝缘环,消除了线路板绝缘电阻对放大电路输入阻抗的影响。
We computed the input impedance of mixer with the first method, and we also discussed the effect of the convergent parameter on improving the convergence with the second method.
用第一种方法求出了混频器的输入阻抗,用第二种方法讨论了收敛参量对改进收敛性的影响。
Values of each segment of this model were adjusted to give an optimum match to aortic input impedance both in values of modulus and phase frequencies.
模型的各段经优化后可使模型与人体动脉系统的输入阻抗的幅频值和相频值相符合。
A device which has an extremely high input impedance, low switching speed and low power consumption.
一种高输入阻抗、低开关速度及低功耗的半导体器件。
The typical SourceMeter instrument doesn't have as high an input impedance or as low a current capability as a source-measure unit.
典型的数字源表不像源-测量单元那样具有极高输入电阻或极低的弱电流测量能力。
The electric characteristic parameters of this novel sleeve antenna are calculated, including the input impedance, voltage standing wave ratio (VSWR), horizontal gain and radiation pattern.
研究了这种新型套筒天线的输入阻抗、电压驻波比(VSWR)、增益及辐射方向图等电特性。
Several examples are given to show that by properly adjusting the distances between elements, the variation of input impedance of the central element as function of scan angle may be controlled.
对于几种排列方案所作的计算表明,利用不均等的元素间距可以在一定程度上控制天线元输入阻抗随着扫描角的变化规律。这可能是解决互耦困难的一种途径。
This paper presents a novel concept for system integration at system level, which is to select output impedance of source converter and input impedance of load converter as objects of standardization.
该文提出一种新颖的系统集成的观点,即从系统级的高度将分布式供电系统中的源变换器的输出阻抗和负载变换器的输入阻抗作为标准化研究的对象。
The stator's characteristics of vibration and input impedance were analyzed by using the finite element software ANSYS. A new decoupling method between the two vibrators was presented.
对电机的运行机理进行了分析,并利用有限元软件ANSYS分析了电机定子的振动特性和阻抗特性,同时提出了一种振子间解耦的方法。
Also, the relationship between the input impedance and load impedance of the waveguide is discussed.
讨论了波导管输入阻抗与负载阻抗之间的关系。
The numerical results were obtained in a table by solving the combined equation of transmission line impedance transfer equation and terminal input impedance expression in gas capacitance.
通过解传输线阻抗转移公式和终端输入阻抗的气隙电容表达式的联立方程得出了数值结果。
The axial cavum measurement device was used to simulate the input impedance of the body antenna based on the theory of long line.
本文基于长线理论用同轴线测量装置模拟弹体天线的输入阻抗值,使引信在同轴线测量装置中其工作状态和自由空间一样。
The analysis shows that the TVA is a pure resistive antenna with a higher input impedance than that of corresponding EVA.
分析表明,三角板天线是一种纯阻性天线,其输入阻抗值比较大。
Instrumental amplifiers with high input impedance, high CMRR and low drift are widely used in the small signal amplifying field.
仪表放大器电路以其高输入阻抗、高共模抑制比、低漂移等特点在传感器输出的小信号放大领域得到了广泛的应用。
By comparing input impedance values before and after optimization, it is showed that the error of input impedance decreases sharply when improved testing device is adopted.
优化前后输入阻抗理论值比较表明:采用优化的测试装置进行测试,输入阻抗误差显著减小,并且这一结论在通常意义下都有效。
G. Fung et al. Results the modulus and phase simulated by the nine-element lumped parameter model could fit the goal input impedance well.
结果三弹性腔九元件集中参数模型模拟出的输入阻抗模和幅角与目标输入阻抗模和幅角能较好的吻合。
By modeling the parameters of metal cylinder such as the diameters of both ports and the length of the metal cylinder, the demand input impedance of the conic horn can be obtained.
此处采用在光壁圆锥喇叭内加载一个外形渐变的金属柱体来改变天线的输入阻抗,调节金属柱体的尺寸,包括两端的口径和长度,可以在要求的频段得到理想的输入阻抗。
When using frequency sweep meter to measure the input impedance of antenna, the balanced - unbalanced transformer must be connected between coaxial transmission line and antenna.
用扫频仪测量天线的输入阻抗时,在同轴传输线与天线间应按平衡—不平衡变换器。
The input impedance is matched conjugately to the source impedance according to the maximization gain.
对于输入电路,则按照最大增益的原则使源阻抗与输入阻抗共扼匹配;
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