This paper describes the design of a frequency shifter to suppress acoustic feedback, to be studied by the experimental method.
本文叙述抑制声反馈的频移器的设计，并进行了实验研究。
If the public address system is operated below but too close to the instability condition the frequency shifter can reduce effectively the interference of the regenerative reverberation.
若语言扩声系统临近不稳定状态工作，频移器可以有效地减少再生混响干扰。
Two novel fibre devices, fibre optic frequency shifter and fibre optic polarization controller, are employed in this system. The principle and design method for the two key devices are described.
在该系统中采用了自行研制设计的实现全光纤化的两个关键光纤元件：普通单模光纤频率偏移器和普通单模光纤偏振控制器，介绍了此两光纤元件的基本工作原理和设计方法。
Direct digital synthesis (DDS) is an advanced all digital frequency synthesis technology, based on the PM function of DDS, this paper gives the design scheme of a DDS digital phase shifter.
直接数字式频率合成技术(DDS)是一种先进的全数字频率合成技术，本文基于DDS的相位调制功能，给出了一种DDS数字移相器的设计方案。
The generator is composed of input shaping circuit, frequency divider circuit, numeric switch phrase shifter circuit, delay second formation circuit, local second formation circuit and so on.
该产生器由输入整形、分频器、数字开关移相器、延迟秒形成、本地秒形成等电路组成。
Through a new feeding construction with phase-shifter, the main lobe of the pattern of the microstrip leaky-wave antenna can scan at a fixed frequency.
通过控制微带漏波天线中部馈电端口移相器，成功实现了工作频率固定下微带漏波天线主波束扫描，并使用电子开关实现微带漏波天线主波束双向扫描。
Experiment investigation on multi-bypass and fixed phase shifter comparison in single-stage high frequency pulse tube cryocooler;
本文采用数值模拟和实验研究的方法对高频脉冲管制冷机的重力特性进行了对比研究。
A novel frequency-fixed beam-scanning microstrip leaky-wave antenna with phase-shifter has been described in this paper.
提出了一种新型带移相器多端口馈电微带漏波天线，实现了频率固定下的相控微带漏波天线双向主波束扫描。
By the aid of the phase shift-frequency characteristic, the conformal transformation and the perturbation theory, a new kind of compact, broadband waveguide phase shifter is developed.
借助相移-频率特性、保角变换和微扰理论，研制出了新型的宽带移相器。
Use a binary digital shifter replace the traditional divider in ADPLL, make the structure simple and keeps the loop gain constant when the frequency multiplication factor changes.
采用数字移位器替代传统的除法器，使得电路结构大大简化，而且在很大的倍频系数范围内都保持很好的稳定性。
Use a binary digital shifter replace the traditional divider in ADPLL, make the structure simple and keeps the loop gain constant when the frequency multiplication factor changes.
采用数字移位器替代传统的除法器，使得电路结构大大简化，而且在很大的倍频系数范围内都保持很好的稳定性。
应用推荐