上升沿

数字电路实验中CP脉冲上升沿和下降沿的正确获得

The correct obtaining of the rising edge and descending edge of CP pulse in the digital circuit experiment

然而，逆变器输出的PWM（脉冲宽度调制）连续高压脉冲的上升沿很陡、频率很高，导致在脉冲电压下牵引电机绝缘过早失效。

However , Pulse Width Modulation ( PWM ) which was input from inverter is characterized by steep rising edge and high frequency , resulting in the too early failure of motor insulation .

快上升沿电磁脉冲作用下PIN二极管中的电流过冲现象

Overshoot phenomena in PIN diode under EMP with fast rise time

高速交流传动机车广泛采用高开关频率器件的脉宽调制（PWM）逆变器，使得逆变器输出脉冲具有陡上升沿。

PWM inverters with high switching frequency may shorten the rise time of PWM output pulses . They have been widely applied in high-speed AC driving locomotives .

快沿电磁脉冲模拟器传输线宽高比对脉冲上升沿影响研究基于ANSYS的脉冲超导磁体电磁结构耦合分析

Study on Influence of Ratio Between Wideness and Height of EMP Simulator Transmission Line with Fast Rise-time to Rise-time of EMP Electromagnetic-structural Coupling Analysis of the Pulse Superconducting Magnet Based on ANSYS

磁偶极子天线方向性的边界元解法在UWB通信中，利用赫兹磁偶极子天线的微分特性，由输入方波的上升沿产生窄脉冲。

For a UWB communication system , by using differential characteristic of Herz magnetic dipole antenna , the narrow pulse can be produced from the rise edge of input square-wave signal .

所有脉冲的上升沿和下降沿时间都小于0.5μs。该脉宽调制器的研究，对于实现射频激励CO2激光器输出光功率的调节起到关键作用。

The time of rising edge and falling edge of all pulse are less than 0.5 μ s.The research results will play an important role in controlling the laser power output for RF excited CO2 laser .

模拟输入信号在CLK的上升沿被锁存。

The analog input signal is latched on the rising edge of CLK .

采用矩量法（MoM）结合快速多极子（FMM）方法，对模拟器在传输不同上升沿电磁脉冲信号时内部的电场波形分别进行了计算。

Electric field in bounded-wave simulator excited by different rising time EMP is calculated using the method of moment ( MoM ) and fast multipole method ( FMM ) .

扭结大多位于QRS波群上升沿中段和下降沿的中下段。

HOMOMORPH-GROUP The slur mainly situated in the middle region of the rising slope , and the middle and bottom regions of the descending slope of the QRS waves .

然后分析了21kHz重频运行时的实验结果，结合PSpice电路仿真结果，研究了输出脉冲上升沿和下降沿的影响因素。

The experimental results at 21 kHz repetition rate and factors which affect the rising and falling edges of the output pulse are analyzed combining with PSpice circuit simulation .

理论模拟采用一维瞬态SBS数值计算模型和边界噪声输入法，得到了SBS反射率和脉冲上升沿的变化规律。

In theoretical simulation , one-dimensional transient numerical calculation model of SBS and method of boundary noise import are adopted , and the changing regularities of SBS reflectivity and leading edge of pulse are achieved .

PIN二极管的I区很厚，所以可以承受高的击穿电压，但是当快上升沿电磁脉冲加载在PIN二极管两端时极容易发生击穿甚至烧毁，这将严重影响系统工作的稳定型和可靠性。

Because of the thick I block , the PIN can bear high breakdown voltage . But PIN will breakdown even burnout when EMP with fast rise time is on it . This phenomenon will destroy the stable work of PIN .

在峰值为350kA，上升沿约80ns的电流作用下，使用针孔成像技术和X射线诊断技术，获得多钨丝等离子体融合图像及相应的软X射线辐射信号。

The pinch was driven by a 350 kA peak current , 80 ns 10 % ~ 90 % rise time . By means of pinhole camera and X-ray diagnostics technology , a non-uniform plasma column is formed among the wires and soft X-ray pulse are observed .

设计了一种基于MarxBankGenerator脉冲发生原理而设计的ns级上升沿调Q开关雪崩三极管高压脉冲发生器。基于雪崩三极管雪崩效应，研制出了一种数千伏、纳秒级脉冲源。

A generator which can produce high voltage pulse with nanosecond rise time was designed . Based on the avalanche effect , a kind of kilo-volt nanosecond pulsers has been designed , by using microwave PCB ( printed circuit board ) .

由于PWM脉冲电压频率高、上升沿陡，含有较多的谐波分量，使传感器耦合出来的信号包含了很多干扰，导致局部放电信号的分析比工频正弦条件下更加困难。

Pulse-width modulation ( PWM ) pulses have fast rise-time , high frequency and many harmonic components which may be coupled as interference by PD sensor . Thus it is more difficult to extract PD signal under PWM condition than sinusoidal wave condition .

采用声发射（AE）和电磁辐射（EME）信号上升沿时间和持续时间的关系，排除噪音等的影响，确定有效信号；

The effective AE ( acoustic emission ) & EME ( electromagnetic emission ) signals are determined , and the noises eliminated by referring to the relationship between the risetime and duration of the signal .

明确提出了小型及微型零件电阻点焊的能量工艺参数除了峰值电流IM、峰值电流时间tM外，电流波形上升沿不同阶段的di/dt是影响焊点强度及其飞溅的第三个重要工艺参数；

It puts forward definitely that the di / dt of current waveform positive going edge in different period is the third important technics parameter of resistance spot welding technics parameter for miniature workpiece besides current peak value IM and the peak value duration tM .

利用高频功率电子开关逆变技术，在TIG焊接电弧回路中施加调制信号，对应着调制电流的上升沿和下降沿可分别激发出电弧超声。

With the addition of modulating signal to the TIG welding loop by the high frequency power electronic switch inverting techniqUe , the arc ultrasonic has been excited corresponding to the rising edge and the descending edge of the modulating electronic current .

根据RLC互连线的二极点模型，得到一个简单的估算信号延迟和上升沿的解析表达式，并利用其实现对高速时钟电路动态优化设计，以保证信号在传输过程中不失真；

A simple analytical expression was obtained based on a two-pole model to evaluate the signal delay and rising time , which was then used to optimize the high speed clock circuit and to ensure signal non-distortion in transmission .

用Matlab自带的doppler波形和方波发生器产生的上升沿小于1ns的方波对此方法进行检验，结果表明时变软阈值法明显优于传统的固定软阈值法。

A Doppler wave in Matlab and a square pulse generated by square wave generator are chosen to validate the effect of the method . The results prove that the time-variant soft threshold method proposed in this paper is better than the traditionally used threshold-fixed method .

该脉冲发生器电路结构简单，脉冲宽度可以从2.2ns到12.2ns连续可调，步进为几十ps，上升沿小于1ns，且具有灵活可编程特点。

Which enables continually to adjust the pulse width from 2.2ns to 12.2ns . It is a available with rise time of ? ü 1ns and characteristics of Programme and agility .

该电路将峰值5kV、重复频率5kHz的电压脉冲进行陡化，使其脉冲上升沿由50μs陡化为40ns。

Pass through the circuit , the rise-time of the 5 kV and 5 kHz pulse is sharpened from 50 μ s to 40 ns .

实验测得了该系统输出的2.2ns整形光脉冲具有小于50ps的上升沿，与100ps啁啾脉冲的时间抖动小于4ps。

Experimental results shows the shaped 2.2 ns pulse has a rise time less than 50 ps , and it is precisely synchronized with the 100 ps pulse with time jitter less than 4 ps.

研制成功输出峰值电压从5~80V连续可调的脉冲信号发生器，信号上升沿小于10ns。利用该信号源，可将压电和铁电陶瓷材料中的快和慢效应完全分开。

A nano-second order pulse signal generator was developed , its peak output voltage can be adjusted smoothly from 5 to 80 V. By using this generator , the fast effect and slow effect of a certain piezoelectric or ferroelectric sample can be clearly separated .

不同上升沿电磁脉冲对腔体耦合的研究

Research on the Different Edges of the Electromagnetic Pulse to the Cavity-coupling

脉冲电场上升沿对细胞跨膜电位的影响分析

Effects of the Rising Edge of Pulsed Electric Field on the Transmembrane Voltage

指数型光脉冲上升沿作用下的阈上离化

Above threshold ionization with an exponentially switched-on laser pulse

随着上升沿时间的增大，两次放电电流的大小也都不断减小。

As the rising time is increased , both he two discharge currents decrease .

得到了如何在窄脉宽情况下获得快速上升沿的方法；

The method which to obtain fast rising time for narrow pulse width is got ;