High frequency pulse width modulation power control systems can be realized using semiconductor switches.
高频脉冲宽度调制电力控制系统，可以实现用半导体开关。
For improving the SNR and the reducing transmit power of the SAR simultaneously, airborne SAR often use high PRF (Pulse Repetition Frequency).
机载SAR为提高信噪比并同时减少发射功率，往往使用较高的脉冲重复频率(PRF)。
The remote control device crystal frequency stabilization using pulse amplitude modulation transmitter, A simpler circuit, high frequency stability, launched 28MHZ are continuous carrier amplitude.
该遥控装置采用晶体稳频脉冲调幅发射机，电路较简单，频率稳定度高，发射的是间断的28MHZ等幅载波。
An improved plan of silicon controlled rectifier (SCR) line type trigger is described in detail. Anew practical circuit of bipolar transistor trigger for high pulse repeat frequency is presented.
详细地介绍了可控硅整流器(SCR)线型触发器的改进型设计方案，提出了用于高脉冲重复频率的双极晶体管触发器的实用新电路。
For a Doppler radar homing seeker with high pulse repetition frequency, the continuous wave approximation is not only simple, but also has a high calculation accuracy.
对于使用高脉冲重复频率的主动多普勒雷达导引头，连续波近似法不仅计算相对简单，而且可以给出较高的计算精度。
It is indicated from the results that effected by the high frequency group pulse power, higher machining quality is obtained by choosing higher main pulse frequency.
结果表明，在高频群脉冲电源作用下，选择较高的主脉冲频率，可获得良好的加工质量。
In the paper, the high frequency pulse tube coolers (PTCs) developed for 80 K and below temperature application are introduced.
首先介绍了作者开发的可用于80K及以下温区的高频脉冲管制冷机。
A novel drive system with high frequency AC pulse density modulation for electric vehicles is proposed, and its operation principle and control method are studied in detail.
提出了一种用于电动汽车的高频交流脉冲密度驱动系统并阐述了系统的工作原理和控制方法。
On the aspect of hardware, they include: narrow pulse and high frequency ultrasonic sensor's design, high frequency signal generator and receiver's design, high speed data completed sampling's design.
因此本文还详细阐述以下内容：硬件方面采用了高频窄脉冲信号发生及接收放大电路、高速数据采集电路；
This paper discusses the theory analysis and circuit design of high-frequency high power source which is modulated by narrow pulse.
本文对窄脉冲调制的高频大功率源进行理论分析和电路设计。
This integrated circuit control the frequency and pulse width of the high voltage IC output signal conveniently by adjusting the input date of IC digital input port.
该集成电路通过对数字输入端口的输入数据的调节，灵活的控制了高压开关集成电路输出信号的频率和脉宽。
Meanwhile, PWM inverters using high switching frequency device that shortens the rise time of PWM output pulse have been widely applied in high-speed AC driving locomotive.
同时，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。
High frequency pulse current machining and fine finishing can improve parts' machining accuracy and surface quality.
高频脉冲电流加工及光整加工技术能提高零件的加工精度和表面质量。
The rational harmonic mode-locking has become a research subject of intense interest due to its application on the generation of ultra- high repetition frequency optical pulse train.
有理数谐波锁模技术是产生高速超短脉冲的重要技术之一，其光时分复用通信技术等领域中有重要的应用价值。
The practice proves that this circuit is effective for separation of high-frequency square wave signals and peak pulse interference signals.
实践证明：该电路能有效地实现高频方波信号与尖峰脉冲干扰信号的信噪分离。
Ultra high voltage + Ultra high frequency + Ultra high pulse: Please choose Amazing Capacitor.
超高电压+超高频率+超高脉冲：就选美志电容。
Functional relations between measured linewidth and optical parameters, structural parameters, oscillator coil and high-frequency rectangular pulse Numbers have been derived in the paper.
推导了被测线宽与光学性能参数，结构参数，振荡频率以及高频矩形脉冲数之间的函数关系式。
This pape studies the optimum design theory and practice of hight frequency high-power pulse transformer of arc welding inverter.
从理论和实践上探讨了弧焊逆变器的高频脉冲功率变压器的优化设计。
This paper will analyze the discharge high-frequency pulse theory and its application in JiangJin Power Supply Bureau's project.
对放电高频脉冲检测原理的装置进行了分析，并在重庆电力公司江津供电局工程中进行了应用。
Matching characteristics among linear compressor, regenerator, pulse tube and inertance tube have large impact on the performance of high frequency pulse tube cryocooler.
线性压缩机、回热器、脉冲管以及惯性管的耦合特性对高频脉冲管制冷机的整机性能有很大的影响。
The PP-IP characteristics at low frequency high pulse current and the emission spectra at direct current have been investigated and analyzed.
研究和分析了它们在低频大电流脉冲注入下的Pp—Ip特性和直流注入下的光谱特性。
Brazing quality and product reliability are both increased as using high frequency pulse microplasma arc heating process for assembly brazing of cathode and photoetching grid of electron tube.
采用高频脉冲微束等离子弧做为电子管阴极和光刻栅极装配钎焊工艺的热源，提高了钎缝质量和产品的可靠性。
A novel topologic structure of high frequency AC pulse density modulation converter is proposed, and its operation principle, control scheme and design are described in detail.
提出了一种新颖的高频交流脉冲密度调制变频器的拓扑结构，并详细阐述了工作原理、控制方案和设计方法。
This designation is to deal with the output sine wave of a high frequency and high voltage power supply, the aim is to develop a high voltage and high frequency nanosecond pulse generator.
本课题对一台高压高频逆变电源输出的正弦电压进行处理，将其设计成一台纳秒级高压高重复频率的脉冲电源。
The high frequency filling each other symmetrical trigger pulse was suggested, which reduce the power need of pulse transformer effectively.
提出采用高频互补对称触发脉冲设计方法，有效地减小了对脉冲变压器的功率要求。
The cell fusion instrument consists of high frequency generator, high amplitude pulse generator and sequence control logic unit.
电致融合仪主要由高频交流场、高压窄脉冲发生器以及控制逻辑单元组成。
The result has dedicated that it could satisfy the process of PECM in high frequency, narrow pulse width and high-power.
实验结果表明，这种高频脉冲电源在高频、窄脉宽、大功率等方面均能满足该工艺的要求。
The steady principle of the inverter with a high frequency pulse AC link and the unipolarity phase shifting control strategy are investigated.
该文深入分析研究了高频脉冲交流环节逆变器稳态原理特性与单极性移相控制策略。
The DC parameters and measurement results of high-frequency and pulse performances for the BNRT are given Basic circuits with regard to the composite operation of BNRT's are presented.
给出了BNRT的直流参数以及高频和脉冲性能的测量结果，提出了BNRT组合运用的基本电路。
The results show that high frequency pulse electric current can refine and crinkle graphite flake, decrease the dimension of eutectic cell.
实验结果表明，在高频脉冲电流作用下铸铁石墨片细化，石墨片变得卷曲，共晶团尺寸减小。
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