电调谐 meaning in English
[电学] electric tuning
Examples
- 2 . experimental studies on ring cavity fiber lasers ( 1 ) a novel electrically tunable fbg edfl is reported
2 .环形腔光纤激光器的实验研究( 1 )用磁致伸缩棒对光纤光栅环形腔激光器进行了线性电调谐。 - The structure can be controlled by controlling the pb contents in a certain temperature . the higher dielectric - temperature coefficient can hence be kept near the applied temperature , improving the dielectric tunability of the materials
控制铅含量可以控制一定温度下的结构状态，可以有目的的控制使用温度附近有较高的介电温度系数，达到改善介电调谐性能的目的。 - Today , liquid crystal , a new functional material , has been applied more and more widely . on the side of display , owing to stable frarne , absolute environmental protecting , save electric energy and no tire for user , liquid crystal display keeps ahead among the range of display . with the developing of the technology of liquid crystsl , lcd will must substitute for crt and become the chief in market . in additin , liquid crystsl light filers which have been used in optic communicatins and light information handling , emply th e technical of combining the birefringence of liquid crystsl and fabry - petrot - type cavity . they manifest a series of merit , such as narrow band wide , deterioration low , wide tuning domain , simple structure and low cost , so liquid crystal light filter draw attention of many country
现在，液晶作为一种新型功能材料越来越得到广泛的应用，在电子显示装置中，液晶显示器以其画面平稳、真正安全环保、省电和使用者不易疲劳等优点领先于显示器的行列中。随着液晶技术的发展，液晶显示器将取代crt显示器逐步成为未来市场的主流。此外，应用于光通信和光信息处理中的电调谐液晶滤光片，采用液晶材料的双折射和电光效应与传统f - p腔相结合，表现出窄带宽、低损耗、调谐范围宽、驱动电压低、结构简单、低成本等一系列优点，而日益受到各国研究部门的关注。 - By making full use of favourable narrow - band tracing filter character of pll and by combining the merits of dds such as super fine frequency resolution 、 high frequency accuracy 、 very fast frequency hoping with it , the pll / pll + dds frequency synthesizer presents wide band high quality source and super small frequency hoping step . while the electronically tuned filter abates the image interference and notably improves the selectivity . the theorem of frequency synthesizer and center - frequency - fixed filter is simply but adequately introduced first in this paper
课题中所采用的pll或dds pll锁相频率合成方法充分发挥锁相环良好的窄带跟踪滤波特性，并结合dds的高频率分辨率、高频率精确度和高速频率捷变等优点，分别实现了系统所要求的高质量宽带本振源和小步长频率捷变；采用电调谐选频技术，则大大改善了接收机的选择性和抗干扰能力。