The experiments of UWB pulse generation using a photoconductive switch in GaAs: Cr operating in linear mode and parallel plate Blumlein transmission line, and radiation by an exponential TEM horn are described.
开展了光导开关产生超宽带电磁脉冲的实验研究工作，利用工作在线性模式的GaAs光导开关、平板Blumlein传输线和指数形TEM天线，实验获得辐射脉冲半高宽1.2ns、峰值功率100kW的超宽带电磁脉冲。
It also incorporates an active damping stage for clean RTZ waveform generation. The fast clamping to ground results in high pulse symmetry and low 2nd order distortion. The TX734 is available in a QFN-64, 9 mm x 9 mm package. It is specified for operation from 0°C to 70°C.
本文介绍了TX734的主要特性，方框图以及超声波系统方框图虾和所用的主要元器件，包括放大器，模拟前端，数据转换器，处理器(DSP –数字信号处理)和脉冲发生器和开关。
An external signal is necessary in the locking process of the traditional multiplying delay-locked loop. It is used to set total delay of the cyclic delay line in acquisition range of the phase detector, or the whole loop would be out of control. The output clock range of the clock synthesizer using cyclic pulse generation technique is limited by the acquisition range of the PD, and the clock synthesizer could not change its output clock frequency from low to high.
传统的倍数延迟锁定回路(Multiplying Delay-Locked Loop，MDLL)的锁定行为，必须先利用一个外部重置讯号将全部延迟调整到最小延迟，再逐渐增加延迟来锁定回路，这是为了避免循环式延迟线所产生的全部延迟超过了相位侦测器的有效捕捉范围，使延迟锁定回路的负回授机制无法回复至其近似锁定状态，因此产生的时脉无法由低操作频率转换至高操作频率，且输出频率范围受到限制。
This feature eliminates complex off- chip write pulse generation and provides increased timing flexibility for incoming signals.
此功能消除了复杂的片外，并提供代写脉冲输入信号的时间增加了灵活性。
To research the mechanism of high power supercontinuum generation by sub-nanosecond pulse pumping photonic crystal fiber, a 1.8 m PCF is pumped by 570 ps pulses from a Yb-doped mode-locked fiber laser, and it puts out SC with 1.15 W power and 750 nm spectral coverage.
研究了亚纳秒脉冲抽运光子晶体光纤产生高功率超连续谱的机理。采用掺镱锁模光纤激光器产生的脉宽570 ps光脉冲，抽运1.8 m光子晶体光纤，得到了平均功率为1.15 W、光谱覆盖范围为750 nm的超连续谱。
The nondipole effects in the high-order harmonic generation caused by the short wavelength of XUV attosecond pulse which is comparable to the scale of spreading electron wavepacket are discussed in this paper.
讨论了由于XUV阿秒脉冲的短波长与扩展后的电子波包尺度可相比拟时在高次谐波产生过程中引起的非偶极效应。
These results may be useful for researches of ultra-short x-ray generation, pulse separation, measurement and its application.
这些研究结果，有助于研究超短X-射线脉冲的产生、分离、测量和应用。
This work set the theoretic foundation and insight in pulse shaping design and signal generation.
在此基础上，研究脉冲信号产生、调制和检测的工程实现技术，为IR-UWB迈向实际应用提供可靠的解决方案。
The Parashield makes use of the latest generation of UEF Pulse Shield Generators.
隔热仓应用了最新一代的UEF脉冲护盾生成器。
A programmable sync pulse generator and sync pulse generation method are operable in a clock synchronizer to effectuate data transfer between first circuitry disposed in a first clock domain and second circuitry disposed in a second clock domain.
可编程同步脉冲发生器(116)和同步脉冲产生方法可以用于时钟同步器(100)中，以便实现配置在第一时钟域的第一电路系统(103A)和配置在第二时钟域的第二电路系统(103B)之间的数据传送。
According to the amplitude-frequency characteristics of UWB pulse, the theory of transistor avalanche effect and its operation principle is analyzed in detail. In this way multi-level parallel and simultaneous trigger narrow pulse generation circuit is designed and realized by simulation, which can increase amplitude of pulse, decrease delay and breadth of pulse.
针对UWB脉冲的幅频特性，详细分析了晶体管雪崩效应理论和工作原理，利用此方法设计出多级并联同触发窄脉冲发生电路，提高了脉冲的幅值，降低了脉冲的时延和宽度，并通过仿真得以实现。
Plasma atomic fluorescence spectrometer; Hollow cathode lamp; Pulse generation; Signal processing; Control interface
等离子体原子荧光光谱仪；空心阴极灯；脉冲发生；信号处理；控制接口
In the paper, the hardware design of the power cable detector prototype is firstly presented, in which the design of keyboard- interruption circuit, high-speed sampling module, data processing cell and waveform display interface and device type selecting are detailed, with emphasis on the generation, transmission, reception of the high frequency pulse with the pulse width adjustable by high-speed CPLD.
论文首先介绍了系统硬件部分的设计，其中包括键盘中断，高速采样，数据处理，波形显示等模块的电路设计和一些重要器件的选型和设计思想，并重点介绍了由高速数字部件CPLD产生的可调脉宽高频测试脉冲，以及测试脉冲的发送，接收和调试过程。
The relativistic backward wave oscillator based on superradiance mechanism is becoming a new technical scheme of compact high power microwave system owing to its generation of nanosecond or subnanosecond pulse with high peak power, high peak conversion efficiency and fast leading edge.
基于超辐射机理相对论返波管能产生高峰值功率、高峰值转换效率、快速上升前沿的纳秒/亚纳秒微波脉冲，正成为高功率微波源系统小型化的新技术途径。
Two kinds of pulse generation methods are proposed based on the analysis of Impulse signal. One is direct pulse generator based on step recovery diode and the other is carrier pulse generator based on tunnel diode.
为了进一步解决在多径环境中的脉冲帧间干扰问题，注意到采用恒虚警接收时信号占空比随着信噪比增加呈单调增加的特点，采用基于接收信号占空比统计的自动增益控制方法，保证判决门限在合适的电平上。
The FPGA realizes functions of trigger pulse generation and trigger protection.
FPGA主要用于生成晶闸管触发脉冲及触发保护等。
The results show that the finishing ratio and the finishing efficiency is lower if the finishing time is longer. 3. The new generation device of rotating magnetic field is developed controlled by pulse circuit for realizing finishing in stationary of workpiece and magnetic pole. The new idea is given to solve difficult problem for internal finishing of outsize and abnormal shape pipe and nonmagnetic material.
结果表明：添加润滑剂可以降低温度，但使切向阻抗力增大，因而去除量大幅度提高，然而表面粗糙度却存在最佳值，对于硬脂酸在4%--5%范围内，表面粗糙度最好；从概率学角度分析磁粒破碎磨损、脱落磨损的发生机率，并进行相应的实验分析，以切削比来考察磁粒切削性能的研究结果表明，切削时间越长，切削比越小，切削效率越低。
Generation of powerful pulse current is a key problem for crack arrest by electromagnetic heat effect.
如何产生高强度脉冲电流是应用电磁热效应遏制金属裂纹扩展的一个关键问题。
Autocorrelator with second harmonic generation, we measured the width of pulse. Two photon absorption phenomenon was observed.
阶自相关方法测量了脉冲的宽度，并观察到了明显的双光子吸收现象。
The paper analyses the component and working principle of the amplification circuit, generation of control signal and rectification of pulse form, working principle of control circuit of the attracting cloth edge and the protector for overcurren
介绍了一种新颖、实用的光电式电子吸边器光电信号处理和控制电路。分析了其中放大电路的组成和工作原理，控制信号的产生、整形和吸边工作原理及其过流保护环节