跨导

This indicates the presence of the surface states on the surface of the barrier layer.

近期的研究表明，在GaN和AlxGa1-xN势垒层的表面存在表面态，这对GaN和AlxGa1-xN/GaN异质结中载流子的分布有显著的影响[8～ 11] ，从而对基于调制掺杂AlxGa1-xN/GaN异质结构器件的性能有着很大的影响，会降低载流子浓度和漏电流，减小器件的跨导和阈值电压。

By detailedly deriving the equations of the input impedance, transconductance, voltage gain and noise figure, an inductive degeneration common emitter low noise amplifier which is used in an ultra high frequency receiver chip is designed.

通过详尽推导电感负反馈共发射极低噪声放大器的输入阻抗、跨导、电压增益以及噪声系数的表达式，讨论并设计了一个应用于超高频接收芯片的低噪声放大器。

The cutoff frequency is 264 MHz. OTA (Operational Transconductance Amplifier) is realized in pseudo differential topology to maximize the linearity of the filter. Architecture of transconductance enhanced source degeneration is adopted for the VGA to control the gain, together with a source degeneration capacitance to widen the bandwidth.

滤波器采用5阶Chebyshev近似、GC biquad结构，转折频率为264 MHz，OTA采用伪差分结构以提高滤波器的线性度；VGA采用跨导增强型源级负反馈结构来控制增益，并加入源级负反馈电容进行高频补偿以拓展带宽。

But, because mobility of raceway groove of Si CMOS parts of an apparatus is low, bring about parts of an apparatus cross guide the Si parts of an apparatus that falls under same size, so gain of its open loop also is less than the Si operation amplifier of identical structure and dimension.

但是，由于Si CMOS器件沟道迁移率低，导致器件的跨导低于相同尺寸下的Si器件，所以其开环增益也小于相同结构和尺寸的Si运算放大器。

In addition, the corresponding analog transconductance neural optimizer based on modified augmented Lagrange multiplier approach is developed.

对单测试激励下线性约束L〓范数估计问题的求解，提出了基于改进的罚函数法和Lagrange乘子法两种跨导神经优化求解器。

The transconductance is adjusted by software in order to improve accuracy.

摘要该文给出了基于可编程跨导运算放大器的有源滤波器设计方法，能在一定范围内实现跨导值程控调节，提高调节精度和准确度。

In this paper, based on the programmable transconductance amplifier of the active filter design method that can realize in a certain range transconductance value of program-controlled adjustment, improve precision and accuracy regulation.

该文给出了基于可编程跨导运算放大器的有源滤波器设计方法，能在一定范围内实现跨导值程控调节，提高调节精度和准确度。

Ac-coupled technique is used in the transconductance stage to reduce the supply voltage ulteriorly.

跨导级采用了交流耦合互补跨导进一步降低了电源电压。

In this paper, the method of using Volterra series expansion to analyze the linearity of high frequency CMOS transconductance stage with source degeneration resistor is provided. In order to reduce the complexity of the analysis, the transconductance stage is treated as cascade connection of two nonlinear systems. The IIP3 (input referred third-order intercept point) of the transconductance stage is calculated.

将Volterra级数用于分析工作于高频，含有源级负反馈电阻的CMOS跨导级的线性度，为了降低计算的复杂性，将CMOS跨导视为两个非线性子系统的级联，计算了跨导的IIP3。

Operational Tran conductance lifers and Grounded actorhas become one of the most important methods to implement integrated continuous-time filters. Operational Tran conductance Amplifierscan transfer input voltage into current to output,and control or change output current within large range by an external controlling current of amplifier. Most articles consider OTA as a voltage-mode circuit component and give voltage-to-voltage transfer function of all having been implemented filter circuits,i.e. The input signal and output signal of filter circuits are voltages .

运算跨导集成运算放大器OTA ( Operational Tran conductance Amplifier 以下简称跨导运放)的功能是将输入电压转换为电流输出，并通过外加偏置电流控制运放的工作电流，从而使它的输出电流在较大范围内变化，而在大多数文献中，器件都被作为电压模式元器件使用实现的各种滤波电路都是按传送电压比给出的，即滤波电路输入信号和输出信号均为电压信号。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。