数字频率计是一种基本的测量仪器。
The digital cymometer is a kind of basic measuring instrument.
介绍了一种利用EDA技术设计的数字频率计。
This paper discusses the digital cymometer design principles by using EDA technology.
提出一种新的面积优化的直接数字频率合成器设计方案。
An area-efficient design proposal of a direct digital frequency synthesizer is presented.
采用直接数字频率合成(DDS)技术，实现波形发生器。
It also presents the realization of wave form generation with DDS technology.
根据其特性，利用FPGA设计了高准确度的数字频率信号源。
According to its characteristic, a high accuracy digital frequency supply oscillator has been designed using FPGA.
介绍了基于直接数字频率合成技术的双通道任意波形信号发生器。
The double channel arbitrary wave generator based on direct digital frequency synthesis is introduced.
直接数字频率合成技术(DDFS)是一种先进的频率控制技术。
Direct digital frequency synthesis (DDFS) is an advanced technique for frequency synthesis.
数字查表法合成周期信号是一种最常用的直接数字频率合成技术。
Digital look up table method for synthesizing periodic signals is the most popular technique for direct digital frequency synthesis.
数字频率计是直接用十进制数字显示被测信号频率的一种测量装置。
The digital frequency meter is a device which is one kind of using decimal system digital directly display the signal frequency.
数字频道带宽为19.39MHz，数字电视接收该频道信号并解码。
The digital channel carries a 19.39-megabit-per-second stream of digital data that your digital TV receives and decodes.
该方案实际上是一个输出频率受控的直接数字频率合成(DDS)系统。
The digitized FM system is actually a Direct Digital Synthesis (DDS) system that the frequency of the output is controllable.
目的探讨字频、空间频率、笔画数和近视程度对汉字图片辨认正确率的影响。
Objective To investigate the influence of word frequency, spatial frequency, character strokes and myopia status in identifying Chinese characters.
方法：根据数字频率合成理论，基于FPGA实现了多频信号源的核心部分。
Method Based on the digital frequency synthesis theory and FPGA, the main part of a multi-frequency signal source is accomplished.
对于数字频道53来说，53.1，53.2，53.3就是它的三个子频道。
For example, if the digital TV channel is channel 53, then 53.1, 53.2 and 53.3 could be three sub-channels on that channel.
文章重点讨论了本地载波解调中的直接数字频率合成器（DDFS）模块的设计。
The design of direct digital frequency synthesizer(DDFS)in the way of local carrier demodulation is mainly introduced.
在数字电路中，数字频率计属于时序电路，它主要由具有记忆功能的触发器构成。
In the digital circuit, the digital frequency meter belongs to the sequence circuit, it mainly by has the memory function trigger constitution.
提出了一种应用于数字视频编码器中直接数字频率合成器(DDS)的设计方案。
A design scheme is proposed for a direct digital synthesizer (DDS) used in digital video encoders.
系统采用计算机控制下的直接数字频率合成(DDS)技术，实现电调谐波长扫描。
Using DDS (Direct Digital Synthesizer) technique under control of single-chip computer, electronic-tunable wavelength scanning is realized.
本文介绍了一种利用数字频率温度补偿装置来提高DRO的频率温度稳定性的方法。
In this paper, it is introduced about how to utilize digital frequency temperature compensation circuit (DFTCC) to improve DRO s frequency vs temperature range stability.
直接数字频率合成器dds具有极高的分辨率、频率转换速度快、相位噪声低等优点。
Direct Digital Synthesizer (DDS) has the advantages of high frequency resolution, rapid frequency change rate and low phase noise.
文章介绍了直接数字频率合成器(DDS)的基本工作原理，同时对其杂散进行了分析。
The paper introduced the working principle of the direct digital frequency synthesizer (DDS) and its spurious analysis is performed.
采用高精度的直接数字频率合成（DDS）和数字锁相环技术，实现了高频率跟踪精度。
DDS and digital phrase-lock technology have been applied in FPGA to improve the accuracy of frequency tracking.
作者等人以8086微机实现的数字频率引导设备已成功地应用于同步通讯卫星测控站中。
We have implemented the equipment of digital frequency leading by 8086 microcomputer and successively applied in measuring and control station of synchronization communication satellite.
由于相位舍位会导致直接数字频率合成器(DDS)的输出产生杂散，使其频谱特性恶化。
As we know, spurious noise of a DDS resulted from phase truncation degrades its spectral characteristics.
本文介绍了一种同步测周期计数器的设计，并基于该计数器设计了一个高精度的数字频率计。
The design of a counter measuring synchronous period is introduced in this paper. And based on it, a high precision digital cymometer is designed.
首先分析直接数字频率合成器(DDS)的基本结构、工作原理、杂散来源、输出频谱特性。
At first, this paper described the basic structure, working principle, sources of spurious signals and characteristics of output spectrum, of direct digital frequency synthesizer (DDS).
目的利用事件相关功能磁共振成像技术观察出声阅读条件下不规则汉字频率效应的脑激活模式。
Objective To characterize brain activation associated with the effects of frequency in reading aloud of Chinese characters using event-related functional magnetic resonance imaging.
目的利用事件相关功能磁共振成像技术观察出声阅读条件下不规则汉字频率效应的脑激活模式。
Objective To characterize brain activation associated with the effects of frequency in reading aloud of Chinese characters using event-related functional magnetic resonance imaging.
应用推荐