高频信号

激光印字机上的甚高频信号合成器

VHF Signal Synthesizer for Laser Beam Printer

DSP（数字信号处理）在高频信号检测中的应用开发

Exploitation and appliance of DSP ( digital signal processing ) for high frequency signal detecting system

GIS局部放电超高频信号的包络分析与缺陷识别

Envelope Analysis and Defects Identification of Partial Discharge UHF Signals in GIS

GIS中局部放电特高频信号采集系统

UHF Signal Extraction for GIS Partial Discharge Detection

I／Q方法用于高频信号鉴相

I / Q Methods Applied to Phase Detection of RF Signals

基于超高频信号检测GIS局放模式识别

Identification of PD Patterns in Gas Insulated Switchgear ( GIS ) Based on UHF Signals

基于ARM的AGC高频信号功率调节电路设计

Level Modulation Circuit Design for RF Signal in AGC Based on ARM

利用双端口RAM技术实现的高频信号数据采集系统

High Frequency Signal Data Acquisition System With Dual Ports RAM Technique

使用CycloneⅢFPGA及相关外围电路，实现了对高频信号频率的测量。

Achieved the measurement of high-frequency signal frequency by Cyclone ⅲ FPGA and related peripheral circuits .

由于声电荷转移（ACT）这一新颖的高速缓冲抽样技术的发明，使得新一代高速高频信号处理器件的实现成为可能。

The high-speed and high-frequency signal processor has been enabled by a new high-speed buffer memory technology called acoustic charge transport ( ACT ) .

基于高频信号注入的无传感器新型DTC系统

Sensorless New DTC System Based on High Frequency Signal Injection

然后利用PM扩散方程提取残余图像中的高频信号。

Then P-M diffusion equation was used to get the high frequency signal of image from the remnant image .

为了解决高频信号频谱检测系统数据采集慢、体积庞大的问题，开发了基于DSP芯片的数据采集及处理系统。

In order to improve the speed of data acquisition and retrench the high frequency signal detecting system , a data-acquisition and transacting system is put forward based on DSP .

该系统主要由NI高频信号采集仪、NI信号发生器、功率放大器和SA传感器四个主要组成部分构成。

The system mainly consists of four major parts of NI high frequency signal acquisition instrument , NI signal generator , power amplifier and the SA sensor .

一种基于DSO的高频信号采集方法

A Method of High-frequency Signal Acquisition Based on DSO

在编码前，先对数据进行分块，离散余弦变换（DCT）及量化，保留能量大的低频信号，丢弃高频信号以达到压缩。

Before coding , we divide data into blocks , DCT and quantization . The low-frequency signals that have more energy are maintained and others are rejected .

通过对GIS内4种典型绝缘缺陷的物理模型试验，获得大量的PD超高频信号数据。

Using Ultra-high frequency ( UHF ) method , a lot of data for partial discharge ( PD ) is acquired based on four physical models of typical defects in Gas Insulated Switchgear ( GIS );

最后，本文还提出了一种新的计时方法，可以用低频计时时钟测量高频信号，并给出了一种用PLL实现的方案。

At last , a new timing method is introduced in this paper , it can timing a high-frequency signal with a low-frequency clock . A realization scheme is presented accordingly .

为实现永磁同步电动机的低速无传感器控制，采用了高频信号注入法，同时将EKF引入到高频信号注入法的滤波环节当中，避免了传统滤波器带来的相位滞后等问题。

Meanwhile , EKF was introduced into the filtering aspects of the high-frequency signal injection method . This method avoided the phase lag of traditional filter .

作为万兆以太网和SDH收发机的重要模块之一，并串转换电路需要处理频率约为数据速率（10-Gb/s）一半的高频信号。

As one of the key components of 10 Gigabit Ethernet and SDH / SONET , serializer must handle high-frequency signals whose frequencies are half of the data rate ( 10-Gb / s ) .

装定器电路包括：主控制芯片、E类功率放大器、调制器、高频信号发生器以及频率跟踪器等；引信接收模块由接收线圈、能量存储模块和信息解调反馈模块等。

The setting transmitting module contains main control chip , high-frequency signal transmitter , E power amplifier circuit , information demodulator , frequency tracker and so on ; the fuze receiving module is composed by receiving coil , energy storage model , information demodulator and feedback module .

针对在GIS局部放电信号检测中超高频信号很微弱及白噪声干扰的存在，将小波分析应用于GIS局部放电信号处理，提出在白噪声干扰中提取GIS局部放电信号的小波包变换门限值法。

Wavelet analysis is used to process the signal of PD in GIS . Since the ultra high frequency energy is weak and the white noise is in existence , threshold method has been put forward to reject the white noise on the base of the wavelet packet decomposition .

结合PCB设计的经验，首先探讨了包含高速、高频信号PCB设计中电磁兼容性的基本问题，接着给出针对高速数模混合信号PCB设计中具体的电磁兼容设计原则和方法。

According to the experience of PCB design , some basic EMC concepts about PCB design technique with high-speed and high-frequency signals are discussed . Some rules and methods are presented for the EMC design of PCB with digital and analog mixed signals .

对输出频率可变的高频信号源实现方案作了深入分析，比较了直接模拟合成、锁相环合成和直接数字合成（DDS）三种方法各自的优缺点。

The RF signal source should be of variable output frequency , so we make comparison of direct analog synthesizers , phase-locked loop synthesis and direct digital synthesis ( DDS ), and present the respective advantages and disadvantages of three methods .

提出了利用通信调度复用载波机传送纵联保护高频信号，实现110kV输电线路的高频保护的方法。

It presents a realization method for high frequency protection in 110 kV transmission line by using dispatch and communication FDM or TDM carrier .

WGC-01A型微机高频信号传输装置的设计特点

The design features of the WGC - 01 A microprocessor - based HF signal transmission system

本文在开始首先介绍了永磁同步电机的数学模型，接着对永磁同步电机的基于SVPWM矢量控制进行了分析及仿真，然后着重对注入高频信号来检测转子位置信息的方法进行了详细介绍。

At the beginning the paper introduce the mathematical model , then analyze and simulate the vector control of PMSM based on SVPWM , at last paper focus on the method of injected high frequency signal for detecting the rotor position information .

对体表常规心电图导联进行10～30Hz的低噪声滤波放大，能使ST-T较大地滤掉或振幅减低，而P波则呈高频信号录得。

By the use of low-noise filtration and amplification of 10 ~ 30Hz on the routine body surface electrocardiographic leads , the ST-T wave was either largely filtered out or was recorded as a relatively small-amplitude , low-frequency signal .

从切削力高频信号的切削速度、进给量、采样频率和时间可以定性描述锯齿形切屑形态和剪切失稳的特征参数，依据Shaw建立的锯齿形生成频率模型。

According to the cutting speed , feed rate , sampling frequency and time , the characteristic parameters of saw-tooth chip type and shear instability could be calculated based on the saw-tooth chip forming frequency formula supported by M.C. Shaw theory .

数字万用表（DMM）只能测量直流和几十到几百赫兹的低频正弦信号幅度，不能测量高频信号和信号的频率。

On usual DMM only can measure signal 's amplitude of DC and AC from fifty to five hundred Hz , it can not measure signal 's frequency or amplitude of high frequency .