dds direct digital synthesizer 中文意思是什麼

dds direct digital synthesizer 解釋

  • dds : 1. Doctor of Dental Surgery 〈美國〉牙科博士。2. Doctor of Dental Science 牙科學博士。
  • direct : adj 1 筆直的，一直線的；正面的。2 直接的。3 直截了當的，直率的，明白的。4 直系的，正統的。5 【語...
  • digital : adj. 1. 手指的；指狀的。2. 數字的，數據的。n. 1. （鋼琴等的）琴鍵。2. 手指。
  • synthesizer : n. 合成者，合成物；〈尤指〉【電學】合成器，綜合器。
  1. The subject derives from electronic equipment bureau of electronic information industry of department of general equipment of china. the subject researches dds ( direct digital frequency synthesizer ) signal source of the frequency agile signal generator. it plays a good role in the important pre - research project that is the test technology of tactics anti - jamming for communication transceiver synthesis

    本課題是總裝備部電子信息部電子裝備局下達的預研項目? ? 《戰術抗干擾通信電臺綜合測試技術》中的信號源部分（捷變頻信號發生器中的dds信號源部分） 。
  2. 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

    直接數字頻率合成器是現代頻率合成的主要工具，它有頻率解析度高，頻率轉化快等眾多優點。
  3. Through the research of direct digital synthesizer ( dds ) used as a divider in phase lock loop ( pll ), a frequency synthesizer with small frequency resolution ratio and high purity frequency spectrum can be realized

    摘要通過對直接數字合成器在鎖相環路中作為分頻器應用的研究，使頻率合成器可以在實現超細頻率解析度的同時達到高的頻譜純度。
  4. 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展進行概述，而後針對本次設計的重點，對應用較為廣泛的鎖相頻率合成理論進行了深入的探討，詳細介紹了鎖相環的工作原理、組成結構和鎖相類型，並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:改善環路形式、降低分頻數、增大鑒相頻率等。接著介紹了直接數字頻率合成器（ dds ）和注入鎖相電路的原理特點以及相噪分析，它們也是本次設計的重要電路。
  5. 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 )

    首先分析直接數字頻率合成器（ dds ）的基本結構、工作原理、雜散來源、輸出頻譜特性。
  6. The primary work in this dissertation : 1. based on the analysis of direct digital synthesis ( dds ), this dissertation compares the differences and similarities between direct digital waveform synthesizer ( ddws ) and direct digital frequency synthesizer ( ddfs ). a dds system is presented, and the theoretical analysis and practical implementation of the system is discussed in details

    本文所作的主要工作如下: 1 .全面分析了直接數字合成（ dds ）技術的工作原理，對比了直接數字波形合成（ ddws ）及直接數字頻率合成（ ddfs ）兩種數字波形產生方法，並就其理論設計和工程實踐問題進行討論。
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