查询词典 frequency bandwidth

It would seem that eliminating one sideband would cut the bandwidth required in half or double the rate in a given bandwidth.

似乎只要去掉一个边带就能将所需带宽减少一半，也就是说在给定带宽下使速率增加一倍。

In addition, videoconferencing requires significant bandwidth-depending on the circumstances,from 10 to 100 times more bandwidth than VoIP.

另外，视频会议需要很高的带宽依赖，根据情况不同是VoIP的10到100倍。

In this paper, the frequency spectrum and the bandwidth of the frequency shift signal with continuous and discontinuous phase are analyzed.

分析了相位连续与不连续移频信号的频谱并比较了它们的带宽。

The definition and transformation relationship of natural frequency, bandwidth fre quency and dualˉten index frequency were studied.

文中研究了转台自然频率、带宽频率和双十指标频带的定义与相互转换关系。

The low/mid crossover frequency is sweepable from 60Hz to 1KHz providing an ideal frequency split between your subs and mid drivers and the mid/high crossover point is sweepable from 1KHz to 9KHz giving you enough range to effectively send an appropriate bandwidth to your mids and tweeters.

低/中交叉频率sweepable从60赫兹到1kHz时提供之间的潜艇和中司机和中/高的交叉点，是理想的频率从1kHz分裂sweepable到9KHz给你足够的范围，有效地发送一个合适的带宽和您的中频高音喇叭。

A charge pump phase locked loop based on self biased technique is presented. In this technique, the operating bias levels are essentially established by the operating frequency of the voltage controlled oscillator, namely, all bias voltages and currents are determined by VCO controlling voltage. Thus, a fixed damping factor and a fixed ratio of the bandwidth to operating frequency are obtained, which are defined by th...

给出了基于自偏置技术的电荷泵锁相环电路，压控振荡器的工作频率动态地建立了电路内部所有的偏置电压和电流，从而实现了固定衰减因子，固定环路带宽与工作频率之比，这二者由电容的比率决定，极大地实现了电路设计的工艺无关性，同时也得到了小的相位抖动，最后，对这种锁相环的稳定性进行了一定的分析。

The Hilbert amplitude envelope of the stator current includes the low frequency of fault characteristic, thus it can reduce the signal length by resample the Hilbert amplitude envelope of the stator current by downsampling, which can avoid spectrum aliasing. Then it can reduce the computation time of the MUSIC Method for the spectrum analysis to the resampled signals for the given bandwidth. Meanwhile combining continuous subdivision Fourier transform and rotor slot harmonics based slip estimation it can in advance estimate the concrete values of the fault characteristic frequency, and then inquiry purposely the fault feature component information in the stator current spectrum in order to accomplish the broken rotor bar fault with high sensitivity and h reliability, which eliminates adverse effect of issuable false peaks to the fault detection and formed a novel scheme to detect broken rotor bar fault.

定子电流Hilbert幅值包络信号包含了低频的故障特征频率调制信号，故通过对定子电流Hilbert幅值包络信号进行降采样率重采样、减少分析信号长度，可避免低频段频谱混叠，再对减少的重采样数据进行具有超分辨率的MUSIC低频段估计，可大大降低MUSIC算法频谱估计时间；运用连续细化傅里叶变换和转子齿槽谐波转差率估计技术，可预知故障特征频率精确值，从而可有目的地查询故障分量，消除MUSIC虚假波峰对故障检测混淆的影响，大大提高了故障检测的灵敏度和可靠性，以此形成异步电动机转子断条故障检测新方法。

This compensation circuit can make the stability of the LDO linear regulator undependent on the effect of load capacitor's equivalent serial resistance, and it also makes the unit gain frequency bandwidth change slightly when the load is varying, thus greatly improving the performance of transient response, Furthermore, on the basis of dynamic frequency compensation, an overcurrent protection circuit is designed.

文章针对LDO稳定性的问题，提出了一种内部动态频率补偿电路，使LDO线性稳压器的稳定性不受负载电容的等效串联电阻的影响，其单位增益带宽也不随负载电流变化而改变，大大提高了瞬态响应特性；采用Hynix 0.5μm CMOS工艺模型对电路进行仿真；此外，该电路在实现动态频率补偿的基础上又加入了系统的过流保护功能，当负载电流大于限制电流时，LDO不能正常工作；当负载电流小于限制电流时，又自动恢复到正常工作状态。

On the other hand, temperature compensation of the resonance frequency might become a problem if the bandwidth of the antenna circuit is low compared to the temperature variation of the resonance frequency.

另一方面，温度补偿的共振频率可能会成为一个问题，如果天线的电路带宽比较低的共振频率的温度变化。

Center frequency of the system is 280MHz with a bandwidth of 10MHz. The sample frequency is 2GS/s. The system shows the lightning VHF source in 2-D, and the error for azimuth is less than 1 and 3 for elevation.

系统能够给出闪电VHF辐射源的仰角和方位角二维发展图像，对方位角的测量精度大于仰角，从标定结果来看，系统对方位角的测量误差在1度以下，而对仰角的测量精度随着仰角的减小而降低，对所分析的高仰角闪电，仰角误差一般不超过3度。

In the chapter 2, the theoretic knowledge about the photosensitive resin and the grinding tools was firstly introduced.

第二章阐述了光固化树脂结合剂磨具的相关理论研究。

Do not use the program's indenting or margin-setting features; these will be added during typesetting.

不要使用缩排，页面边缘设置之类的选项，偶看不大懂。