- 數(shù)字頻率合成器
- 數(shù)字頻率綜合器
- 數(shù)字式頻率合成器
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digital frequency synthesizer中文什么意思
例句與用法
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- Dfs digital frequency synthesizer
數(shù)字頻率合成器 - Study on direct digital frequency synthesizer technology based on piecewise pperation
基于分段運算的直接頻率合成技術(shù)研究 - 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 )
首先分析直接數(shù)字頻率合成器( dds )的基本結(jié)構(gòu)、工作原理、雜散來源、輸出頻譜特性。 - Direct digital frequency synthesizer ( dds ) is an apparatus to generate wave on the required frequency . it provides high frequency resolution , rapid frequency transforma - tion and other superiority
直接數(shù)字頻率合成器是現(xiàn)代頻率合成的主要工具,它有頻率分辨率高,頻率轉(zhuǎn)化快等眾多優(yōu)點。 - Then according to the emphasis of the design , went deeply into the theory of pll frequency synthesizers widely used , described pll ’ s working principle , structure and several types in detail , and made research and analysis of pll frequency synthesizers ’ phase noise , including the effect of the active loop filter on the phase noise , and give some methods to make improvement as well , such as changing loop filter form , reducing divide number , and increase phase detector frequency , etc . then paper introduced the principle character and phase noise analysis of direct digital frequency synthesizer ( dds ) and injection phase lock circuit , which are also important circuits in the design
論文首先對幾十年頻率合成器的發(fā)展進行概述,而后針對本次設(shè)計的重點,對應(yīng)用較為廣泛的鎖相頻率合成理論進行了深入的探討,詳細介紹了鎖相環(huán)的工作原理、組成結(jié)構(gòu)和鎖相類型,并對鎖相頻率合成器的相噪特性進行了研究分析,包括有源環(huán)路濾波器對于相噪的影響,提出了改善相位噪聲的幾點措施:改善環(huán)路形式、降低分頻數(shù)、增大鑒相頻率等。接著介紹了直接數(shù)字頻率合成器( dds )和注入鎖相電路的原理特點以及相噪分析,它們也是本次設(shè)計的重要電路。