An analog signal is composed of four basic components: DC and AC magnitudes, frequency, and phase.
模拟信号由直流和交流分量、频率和相位四部分组成。
Therefore it can be seen that it will "smooth" the "twice mains frequency DC" into a near constant DC voltage.
因此它可以把“两倍于电源频率的直流电”进行“平滑化处理”，成为一个接近恒定的直流电。
Although this handbook stresses DC measurements, an analysis of noise and instrument response speed requires a brief discussion of time and frequency relationships in electronic circuits.
虽然本书的重点是直流测量，但是要分析噪声和仪器响应速度的问题，就需要简单地讨论一下电子电路中时间和频率的关系。
As the frequency of the AC component increases, the DC meter response decreases, until at some frequency only the average input voltage will be displayed.
当交流分量的频率增加时，直流仪表的响应就会变得不够快，直到在某一频率时，仪表只能显示出输入电压的平均值。
The7years 'applicable practices indicate that the frequency modulation technology with dc bus voltage ripples is very effective to suppress acoustic resonances.
7年的使用实践表明，直流脉动电压频率调制技术对抑制声谐振现象十分有效。
Comparing with frequency converting driving system for asynchronous machine and adjustable speed for DC motor, the driving system has a wide application foreground.
与变频异步电机驱动系统和直流电机调速系统相比，开关磁阻电机驱动系统有着广阔的应用前景。
RF (or microwave) signals have switching considerations that differ from those for DC or low frequency AC signals.
射频（或微波）信号的切换不同于直流（DC）或低频交流（AC）信号。
They are reliably protected against overheating, overload and short-circuits as well as high frequency and DC at the output.
他们是可靠的保护，防止过热，过载，短路以及高频率和输出直流。
The three analog signal types are the DC signal, the time domain (or AC) signal, and the frequency domain signal.
三种模拟信号分别为DC信号，时域(或ac)信号，以及频域信号。
It is convenient to change the optical intensity of the sidebands by tuning the DC bias voltage while the microwave modulation frequency and power are fixed.
当微波调制频率及功率一定时，可方便地调节直流偏置电压来改变各阶光波的强度。
The objective of DC power modulation is to damp the relative swing of angle and frequency of the two areas from COI.
直流输电线路功率调制的目标是阻尼区域COI功角和频率间的相互振荡。
The results show that this testing system is fit for the test of DC signals, lower frequency signals and Power Frequency signals.
结果表明，该测试系统不仅适合于直流信号的测试，而且同样适合于低频信号、工频交流信号的测试。
It introduces a kind of powerful complementary DC and constant voltage power device by using the independent excitation and high frequency PWM wave clipper.
介绍一种利用它激式高频pwm斩波技术完成的大功率直流稳压电源装置。
It has been shown that the designed DC switching mode converter has a stable output voltage frequency, small ripple, high operating frequency and low power consumption.
结果表明，所设计的直流开关型变换器集成模块输出电压稳定、纹波小、工作频率，高、功耗低，且体积小。
Such problems as the attenuation of DC elements and Sine waveform, voltage sag and frequency deviation should be taken into account in order to analyze the transient process in the power system.
要分析电网的暂态特性，还必须考虑衰减直流分量和衰减正弦波，以及电压缺口和频率偏移等问题。
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.
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。
Brushless frequency motor for model TGL16M and Brushless DC motor for TGL16 which in great torque, free maintenance, no powder pollution, quick in speed up and down.
TGL16 M采用无碳刷变频电机，TGL16采用无碳刷直流电机，免维护，大力矩，升降速快。
And the resulted AC current on the DC side will have the similar frequency shift when transfers to the stator of the generator.
直流侧电流扰动反映到交流定子侧，也将发生频率偏移。
We find that the permeability and the resonance frequency can be adjusted by the DC bias magnetic field, and the bistable characteristic arises under certain conditions.
我们发现磁导率及其共振频率均可以通过直流偏置磁场进行调节，并且在一定条件下出现双稳特性。
The author bas joined in and auc- cessfully accomplished a PFM DC regulated power supply using high frequency fast switching thyristor, which has been adopted in practical application.
笔者曾参与研制成功一种利用高频型快速晶闸管实现的PFM型直流稳压电源，已付诸实际使用。
The paper analyzes the method of low frequency signal injection, which is usually used to detect DC system grounding fault, and advances the method based on wavelet transforms.
分析了低频信号注入法，并且针对其缺陷提出了基于小波变换的检测方案。
A novel topology of high frequency link DC ac converter with bi directional flyback mode is proposed, and its operational principle and control strategy are introduced briefly.
提出了一种新颖的双向电流源高频链DC A C功率变换器的拓扑结构，并简要地阐述了其工作原理和控制方案。
High frequency switching power supply adopting soft switching technology, which has reliable high efficiency and long use time performances becomes the important part of DC power system.
基于软开关技术的高频开关电源因其性能可靠、效率高、寿命长等优点，成为了现代电力操作电源系统中的重要组成部分。
Introduce the high frequency switch technical features of the DC battery panel not vindicated, and pay attention to the problems during using it.
介绍高频开关免维护电池直流屏的技术特点，以及在运用中应该注意的问题。
Widely used in high frequency, DC, rc decrease voltage or pulse circuits. widely used in TV, telecommunication and various electronic equipment.
广泛用于电视，通讯设备等一般电子线路的高频、直流、阻容降压和脉冲电路。
Purpose: Used in circuit of DC or low frequency AC.
用途：用于直流或低频交流电路中。
This paper deals with the development of a simple, cheap, and successful microprocessor program to analyze DC, AC and the frequency spectrum of linear networks.
本文介绍了一适个用于线性网络直流、交流和频谱分析的简单、经济而又实用的程序。
In AC-DC-AC VVVF, We can accurately measure voltage, current, power and frequency with The HIOKI3164 and TOPVIEW31 analysis software, even if the wave is irregularities and distortion.
利用HIOKI3164和TOPVIEW31分析软件，可对交-直-交变频器中电压、电流、功率、频率进行准确测量，不论它是不规则波形还是畸变波形。
In AC-DC-AC VVVF, We can accurately measure voltage, current, power and frequency with The HIOKI3164 and TOPVIEW31 analysis software, even if the wave is irregularities and distortion.
利用HIOKI3164和TOPVIEW31分析软件，可对交-直-交变频器中电压、电流、功率、频率进行准确测量，不论它是不规则波形还是畸变波形。
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