頻率合成技術 的英文怎麼說

中文拼音 [bīnlǜgěchéngjìshù]
頻率合成技術 英文
frequency synthesis technique
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 合 : 合量詞（容量單位） ge, a unit of dry measure for grain （=1 decilitre）
  • 成 : Ⅰ動詞1 （完成; 成功） accomplish; succeed 2 （成為; 變為） become; turn into 3 （成全） help comp...
  • 技 : 名詞（技能; 本領） skill; ability; trick; technique
  • 術 : 術名詞1. （技藝; 技術; 學術） art; skill; technique 2. （方法; 策略） method; tactics 3. （姓氏） a surname
  • 頻率 : frequency; rate
  1. The circulation function therapeutic instrument of brain based on direct digital synthesis ( dds ) technology uses the domestic newest scientific findings and others in foreign countries. adopting the dds technology directly, it produces the safe, valid treatment. through pasting heart electric electrode on body surface, it introduces electric current to cerebral fastigial nucleus ( fn ) without damage in order to improve the state of brain blood supply and nerve conducted and something of lacking proper care to lose the symptom of coordinating with a net, increase cerebral blood flow, reduce downright bad neuron figure, district of penumbra, lighten brain perinemotoma

    基於直接數字頻率合成技術的智能腦電治療儀應用國內國際上最新科研成果，採用直接數字頻率合成技術，實現安全、有效的治療，通過粘貼于體表的電極，無創引入小腦頂核，從而改善腦供血狀態和神經傳導失調失絡癥狀，增加大腦血流量，減少半影區壞死神經元數目，減輕腦水腫，最終達到改善腦循環功能的作用。
  2. This subject comes from the project : c band low phase noise tunnable jumping frequency source in chengdu saiying science and technology co, . ltd. the frequency synthesis technology of pll + mixer is adopted in the final scheme. at first, the developing history of the frequency synthesis technology is reviewed. then direct frequency synthesis technology 、 pll frequency synthesis technology are introduced

    本文首先首先簡述了頻率合成技術的發展歷史，介紹了直接頻率合成技術、鎖相環頻率合成技術、 pll +混頻的頻率合成技術的基本理論以及具體的系統設計中應該考慮的方面。
  3. For digital audio encoding and decoding modules, delta - sigma modulation is introduced and audio data, preambles with accessorial data are multiplexed according to the digital audio interface standard ; for carrier wave, pll frequency synthesizer is used ; for frequency modulation, voltage control oscillator is taken ; for demodulation, pll frequency discrimination is adopted

    調制方式，並按照數字音頻介面標準對音頻數據、同步字和附加信息進行通道復用;對于載波信號，採取鎖相環頻率合成技術手段;對于頻率調制，採用壓控振蕩器;對于解調電路，採取鎖相環鑒頻電路。
  4. This paper include the following parts. firstly the sine exciting - voltage is guaranteed by direct digital synthesize technology ; secondly the digital output of cos ( 9 ) and sin ( 9 ) are generated by microcontroller ; thirdly the two voltage signals which are the product of the two former signals gained by the multiplying d / a converter, being filtered and amplified, have constant frequency, and one amplitude has sine function relationship of with the input angle, and the other amplitude has cosine function relationship of with the input angle ; finally the two signals are acquired and analyzed by relative instrument and software

    主要由以下幾部分組成：用數字頻率合成技術（ dds ）產生正弦激勵電壓信號u _ msin （ t ） ；用單片機產生幅度的數字量輸出sin （ ）和cos （ ） ；用乘法型d a轉換器實現激勵電壓和幅度的乘積，並通過濾波器和功放后即得到頻率固定，幅值隨輸入角成正餘弦變化的電壓信號；最後用數據採集卡採集輸出信號，顯示波形並進行頻譜分析。
  5. Secondly, introduce the frequency synthesis technology

    其次，介紹了頻率合成技術。
  6. It uses lock cirtle frequency compose technology. frequency stable is high

    採用鎖相環頻率合成技術頻率穩定度高。
  7. Phase locked loop technique offers a way to resolve this problem

    鎖相式頻率合成技術提供了解決這一問題的思路。
  8. Study on direct digital frequency synthesizer technology based on piecewise pperation

    基於分段運算的直接頻率合成技術研究
  9. Frequency synthesizing is the key technique to realize a good performance electronic system

    頻率合成技術是電子系統實現高性能指標的關鍵技術之一。
  10. Dielectric resonator ( dr ) is often used to stabilize the frequency of an oscillator

    用介質諧振器設計振蕩器（ dro ）也是微波頻段常用的一種頻率合成技術。
  11. The synthesizer with the low phase noise, highly pure spectrum and high - speed frequency agility has became the tendency to the frequency synthesis technology

    低相位噪聲、高純頻譜和高速捷變的頻率合成器成為頻率合成技術發展的主要趨勢。
  12. The thesis used a fully digital method that employed the principle of direct digital frequency synthesis to realize the modulation based on dsp

    本文採用了完全數字化的方法，是利用直接數字頻率合成技術的原理，並基於dsp的系統實現msk調制。
  13. Secondly, the principle and direct digital frequency synthesis ( dds ) is analyzed deeply. thirdly, the whole system is designed according to the design flow

    其次，對實現原理和在設計中需要用到的直接數字頻率合成技術進行了深入的分析。
  14. Direct digital frequency synthesis ( dds ) is a new frequency synthesizing technique which is developed rapidly in recent years

    直接數字頻率合成（ dds ）是近年來得到迅速發展的一種新興頻率合成技術，它具有頻率精度高、切換速度快、相位連續等優點。
  15. The technology of frequency synthesis is important in latter - day communication system. it ’ s widely used in wireless communication and electron system. with the high - speed development of technologies, higher stability, higher purity, broader range and larger output number of frequency are required in the frequency source of frequency synthesizer which is the core of this technology

    頻率合成技術是近代通信系統的重要組成部分，在無線電通信與電子系統的各個領域中得到了廣泛的應用。隨著各種技術的飛速發展，人們對頻率合成器的頻率穩定度、頻譜純度、頻率范圍和輸出頻率的個數提出了越來越高的要求。
  16. This dissertation is based on the theory of phase lock loop ( pll ) and the design of frequency synthesizer, and the summing up of the work on the microwave and millimeter wave ( mm ) frequency synthesizer

    本文是在充分了解鎖相環（ pll ）的理論和各種頻率合成技術的基礎上，對微波毫米波頻率綜合器的理論探索和實際研製工作的總結
  17. These requirements are too hard to reached by using normal analog circuit. frequency synthesizer is the key technology to produce a great deal of frequency signal

    這些技術要求用普通的模擬電路技術是達不到的，頻率合成技術是產生大量高精度頻率信號的主要技術。
  18. Scalar network analyzer is a kind of intelligent instrument based on frequency sweep test technology that used to measure the amplitude - frequent cy characteristic of linear system. network analyzer adopt these new technology such as frequency synthesis, sampling technique, broad - band sweeping and computer - assisted testing

    標量網路分析儀是一種基於掃頻測量技術，用於測量線性系統幅頻特性的智能化儀器。網路分析儀結合了頻率合成技術、采樣技術、寬帶掃頻技術、計算機輔助測量等新技術。
  19. The main content of this paper : firstly, the basic theory and characteristics of various frequency synthetic technologies and the mixed frequency synthetic technology of dds + pll have been introduced, and the method to expand frequency bandwide has been analyzed and compared

    本文的主要內容:首先介紹了各種頻率合成技術的基本原理和特點，以及dds + pll的混合頻率合成技術，並對擴展頻帶的方法進行了分析和比較。
  20. The phase noise in microwave receiver and the measured parameter of source frequency instability are described in this paper, and the technology of frequency - synthesizing and theory of phase locked loop ( pll ) are also briefly introduced

    摘要闡述了微波接收機中的相位噪聲概念及本振源頻率不穩定度的實際測量參數，並簡要介紹了頻率合成技術和鎖相環路工作原理。
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