頻率合成 的英文怎麼說

中文拼音 [bīnchéng]
頻率合成 英文
frequency synthesis
  • : 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...
  • : 率名詞(比值) rate; ratio; proportion
  • : 合量詞(容量單位) ge, a unit of dry measure for grain (=1 decilitre)
  • : Ⅰ動詞1 (完成; 成功) accomplish; succeed 2 (成為; 變為) become; turn into 3 (成全) help comp...
  • 頻率 : frequency; rate
  1. A 45 48 mhz pll frequency synthesizer for cordless phone receiver

    接收機鎖相環頻率合成
  2. Luo bin ( optics engineering ) directed by yu xuecai, zong derong based on the laser mode locking principle, this paper focuses on the study of dds acousto - optic mode locker

    本文根據鎖模激光原理,進行了dds (直接數字頻率合成器)聲光鎖模器的研製。
  3. As an important target of frequency synthesizer design, phase noise determines system ’ s sensitivity and selectivity whose design is being the emphasis as well as nodus at all times

    它作為頻率合成器的重要指標,決定了系統的靈敏度和選擇性能,一直是設計者的難點和重點。
  4. The designs of the pfd, digital filter ocxo and fractional - n counter in the frequency synthesizer unit are discussed, based on the pll theory. in order to improve the precision of pll, some design methods of pfd are given, and its feasibility is validated by the fpga hardware implement

    2 .在鎖相理論指導下,第三章討論了頻率合成器設計中的鑒鑒相器、數字濾波器、恆溫壓控振蕩器和分電路設計。為了進一步提高頻率合成的精度,文中給出了提高鑒鑒相器性能的一些設計思想,結fpga的硬體設計驗證了其可行性。
  5. Bicmos pll frequency synthesizer for uhf receiver

    4106的鎖相環頻率合成器設計與實現
  6. Design and realization of pll frequency synthesizer based on mc

    頻率合成器設計與實現
  7. Design and implementation of a c - band frequency synthesizer

    頻率合成器的設計與實現
  8. Application of single chip microcomputer at89c2051 in uhf frequency synthesizer

    頻率合成器中的應用
  9. Fpga and dvb standard are introduced firstly, dvb - c standard and composition of its system are analyzed completely, development of modulator structure and dvb - c digital modulator composition are presented, more over, analysis of respective modular are given. then, principle of dvb - c digital modulator system are presented, they are error control technique 、 mqam 、 nyquist rule and root raised cosine filter 、 window design method for fir filter 、 multi - rate signal processing ( integer interpolating, conversion of fractional sampling, equal conversion of net structure, polyphase structure for filter, poly - phase structure for interpolator, multi - stage implementation of samplying conversion ) 、 distrubited algorithm 、 cic filter 、 dds 、 cordic algorithm

    接著,專門利用一個章節闡述了dvb - c前端調制系統原理,他們了差錯控制技術、多進制調制( mqam ) 、 nyquist準則與平方根升餘弦濾波器、有限沖擊響應濾波器的窗函數設計法、多抽樣信號處理包括(整數倍內插原理、分數倍抽樣轉換、網路結構的等效結構、濾波器的多相表示、內插器的多相表示、抽樣轉換的多級實現) 、分散式演算法、 cic濾波器、直接數字頻率合成( dds ) 、 cordic演算法。
  10. Eddy - current sensor conversion circuit consist amplification circuit, band - pass filter circuit, demodulation circuit, differentiation phase and data sampling circuit. these circuits are used to convert the test signal of eddy - current sensor to discrete signal tend to process. the microprocessor system that formed of dsp chip is used to data fitting of test system, data displaying and data communicating with personal computer, etc. the interference questions of hardware design and the measure of eliminating interference signal in the subject are introduced in the last of this chapter

    硬體電路的設計主要分三大部分來實現:激勵源電路部分,由分電路和頻率合成電路組,產生穩定的激勵信號以確保檢測任務的正常進行;傳感器變換電路部分,由放大電路、濾波電路、檢波電路、鑒相電路和數據採集電路組,主要將電渦流傳感器檢測線圈檢測到的信號變換只含有被測信息的離散信號,易於后續電路處理;由dsp晶元構的微處理系統,主要完檢測系統的數據擬、顯示及與主機通信等功能。
  11. In this paper, the development of present situation and technology level of fast frequency synthesizer are analyzed and summarized. also, the theory and methods of fast frequency synthesizer are expounded profoundly

    分析總結了當前國內外快速頻率合成器發展的現狀與技術水平,深刻的闡述了實現快速頻率合成理論和方法。
  12. 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。
  13. 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

    課題中所採用的pll或dds pll鎖相頻率合成方法充分發揮鎖相環良好的窄帶跟蹤濾波特性,並結dds的高解析度、高精確度和高速捷變等優點,分別實現了系統所要求的高質量寬帶本振源和小步長捷變;採用電調諧選技術,則大大改善了接收機的選擇性和抗干擾能力。
  14. In this system two oscillator are used for mixing. pll for high local oscillator and dds + pll for low local oscillator. 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

    系統採用兩次混,其中高本振的設計採用pll鎖相環頻率合成來實現,充分發揮了鎖相環頻率合成器的優良特性,實現了系統所要求的高質量寬帶本振源;低本振採用pll + dds頻率合成來實現,結pll優良的鎖相特性與dds的高解析度、高精確度等優點,實現了的小步進高精度
  15. This paper introduces the method of using the simulation tool " genesys for pll " for the pll synthesizer design, and presents the analysis of the simulation results on bass of which some guiding practical conclusions are drawn, and some problems requiring attention in the simulation process are listed

    摘要介紹了模擬軟體genesys在鎖相式( pll )頻率合成器設計中的使用方法,並對模擬結果進行了分析,得出了一些有指導意義的實用性結論,列出了在模擬時需要注意的問題。
  16. 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。
  17. Pll frequency synthesizer is increasingly used in microprocessor systems and communication. with the development of integrated circuits and the emergence of soc ( system on a chip ) technology, it has been a fundamental and very important module in analog and mixed - signal integrated circuits

    鎖相環頻率合成器現在日益廣泛地應用於通訊、微處理器系統中,並且隨著集電路的發展以及soc技術的出現,其已經為超大規模集電路中不可或缺的模塊。
  18. 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,並按照數字音介面標準對音數據、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;對于調制,採用壓控振蕩器;對于解調電路,採取鎖相環鑒電路。
  19. Then this paper deals with the design and realization of the smart - antenna receiver system architecture. and the receiver is divided into four modules, including rf front - end module |, if demodulation module, analog to digital conversion module and frequency synthesis module

    隨后在此基礎上,對應用於w - cdma系統智能天線接收機進行了系統設計分析,並給出了實現方案,主要包括射前端電路模塊、中解調電路模塊,參考頻率合成電路模塊和數模、模數轉換電路模塊四部分的設計與實現。
  20. In receiver system development, there are some innovations in the design of high linearity and high dynamic range, also in the circuitry realization

    接收機採用兩次變超外差式結構設計,第一中為高中。接收機頻率合成器採用dds來實現1hz的解析度。
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