相頻 的英文怎麼說

中文拼音 [xiāngbīn]
相頻 英文
phase-frequency
  • 相 : 相Ⅰ名詞1 （相貌; 外貌） looks; appearance 2 （坐、立等的姿態） bearing; posture 3 [物理學] （相位...
  • 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...
  1. The traditional analog frequency - sweeping instrument, which mostly uses the lc circuit as the frequency oscillator, is more expensive, too much bigger and heavy to carry. it can only display the curve of amplitude - frequency, but ca n ' t used to measure the phase - frequency, and ca n ' t used to print the curve of frequency response characteristic either. it brings many discommodity to the user

    傳統的模擬式掃頻儀大多是用lc電路構成掃頻振蕩器，它不僅價格昂貴，體積龐大，而且只能顯示幅頻特性曲線，不能得到相頻特性曲線，更不能列印被測網路的頻響曲線，給使用者帶來諸多不便。
  2. Phase frequency curve

    相頻曲線
  3. Dynamic characteristic of the fan system was tested in this paper. the time constants of acceleration and deceleration was gotten and bode diagram of frequency response was presented. the results show that the frequency response of the system is satisfying in the range up to 0. 2 hz

    本文對風機系統的動態特性進行了測試，得到了它的加減速時間，並通過譜分析法得到了系統的幅相頻響應曲線（ bode圖） ，結果表明系統在低於0 . 2赫茲范圍有較好的相應特性。
  4. In the end, the main content of this dissertation is addressed. in chapter 2, based on the analysis of present vibrator ' s principle and structure, two kinds of transfer functions and frequency response curves of the vibrator, driven by voltage feedback power amplifier and current feedback amplifier, are given separately. and turnover frequencies between different frequency rangs are also given

    第二章分析了標準振動臺的工作原理和結構，在此基礎上，建立了標準振動臺的機械和電氣方程，給出了恆壓源和恆流源功放激勵下的振動臺傳遞函數及幅頻、相頻特性曲線，列出了不同頻段間的轉折頻率。
  5. The carrier wave is modulated directly by the baseband signal at several frequency point in l band and s band. firstly, this paper clarifies the theory of i / q modulation, elaborates evm and acpl, and analyzes the effect of amplitude and phase unbalance and dc offset on evm. secondly we review the basic principle of phase locked loop and it ’ s composing parts, including the basic conception and design method of pll frequency synthesizer, especially introduce the charge pump pll frequency synthesizer in detail

    首先，在闡述i / q正交調制基本原理的基礎上，通過對誤差矢量和鄰近通道功率泄漏的詳細分析，定性、定量地討論了各種非理想電路因素（如相位不平衡、幅度不平衡、直流偏差等）對調制器性能的影響;其次，介紹了鎖相環的工作原理和基本組成部分，包括鎖相環的設計和環路濾波器的設計，特別詳述了電荷泵鎖相頻率源;第三，介紹了採用直接調制技術模擬衛星信號的射頻前端的設計;最後，對整個直接射頻調制系統進行測試，結果基本上達到了課題要求。
  6. 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，並結合dds的高頻率解析度、高頻率精確度和高速頻率捷變等優點，分別實現了系統所要求的高質量寬帶本振源和小步長頻率捷變；採用電調諧選頻技術，則大大改善了接收機的選擇性和抗干擾能力。
  7. Log phase - frequency characteristics

    對數相頻特性
  8. At last, the testing experiments are done to check out the testing system. the result of the experiments indicates that the measuring accuracy grade is b to the gjb3370 - 98 standard. and the non - repeatability errors of the amplitude wide and the phase wide are both less than 10 %

    分析結果表明:測試系統達到gjb3370 - 98的測量精度b級要求;動態性能測試中幅頻寬和相頻寬的測量不重復性誤差小於10 % ，滿足測試系統提出的要求。
  9. This paper based on control theory, according to the conception of phrase lock loop and direct digital synthesis, we designed the clock circuit. it realizes the amalgamation of kinds of the ways about clock, which make it has some superiority

    本論文在控制理論的基礎上，以鎖相頻率合成和直接數字頻率合成作為設計思想，搭建時鐘控制電路，在業界實現了多種時鐘控制電路實現方法的融合與統一，具有一定的優越性和領先性。
  10. There are functions such as drawing the chart of amplitude - frequency and phase - frequency, calculating and displaying the highest peak value, the total sum of amplitude and the effective line - breadth of the signal in the program. so an effective technical means is supplied for the analysis of ultrasonic signal

    軟體系統具有幅頻圖及相頻圖的繪制、最高峰值、諧波系數及有效譜寬度的計算及顯示等功能，從而為超聲信號的頻譜分析提供了極其有效的技術手段。
  11. The basic operation principle of phase - locked frequency synthesizer and the type of circuits are expatiated systematicly in this paper. the principle of operation on sampling phase detector and some characteristics including the linear tracking and phase noise in phase loop circuits are analyzed deeply. the research is emphased on the theory and design method of circuits in the sampling phase - locked frequency synthesizer. then, the expansion capturing circuit is analyzed and designed for better performance of capturing loop circuits. at last, the loop filter is also analyzed and contrived taking account of effection of additional phase shift by the sampling - holder. the general research on the theory and technology of sampling phase lock in the paper will make a basement for the development of new product

    本文系統的闡述了鎖相頻率合成器的基本工作原理及電路類型；較深入地分析了取樣鑒相工作原理及電路、鎖相環路的線性跟蹤特性和相位噪聲特性；重點對取樣鎖相頻率合成器電路理論和設計方法進行了研究；為了改善環路的捕獲性能，對擴捕電路進行了分析和設計，並用wewb32軟體對電路進行了模擬；考慮到取樣保持器的附加相移影響，對環路濾波器進行了分析和設計。
  12. Frequency source is widely used in today ' s electronic equipment and even refered as " a heart " of many electronic systems. the frequency synthesizer with a lot of channels and high frequency stability by means of theory of phase locking has almost been a necessary component in the modern electronic systems such as telecommunication, radar and electronic countermeasure. the phase - locked frequency synthesizer can be generally divided into two kinds : one is digital phase locked frequency synthesizer, the other is analog sampling phase locked frequency synthesizer. compared with the prior, the latter has many merits such as lower phase noise, samller volume, lighter weight and lower power consumption and has a wide foreground in the equipments of microwave band

    利用鎖相原理來獲得波道數目眾多、頻率穩定度很高的頻率合成器，幾乎已成為現代通信、雷達和電子對抗等電子系統不可缺少的組成部分。鎖相式頻率合成器一般分為數字鎖相頻率合成器和模擬取樣鎖相頻率合成器兩類。取樣鎖相頻率合成器與數字鎖相頻率合成器相比，具有相位噪聲低、體積小、重量輕和功耗低等優點，尤其在微波波段的電子設備中，具有廣闊的應用前景。
  13. In this paper, a pll frequency synthesizer working in l band is researched. at fist, we review the basic of phase lock loop and it ' s constituent part. after that the basic conception and design method of pll frequency synthesizer was introduced, especially introduced the charge pump pll frequency synthesizer in detail

    本文是採用鎖相原理設計的l波段頻率合成器，首先對鎖相環路的工作原理和基本組成部分進行了簡單的介紹，然後介紹了鎖相頻率合成器的原理和設計方法，主要介紹了目前小型頻率合成器產品中使用最廣泛的由電荷泵數字鑒頻鑒相器和無源環路濾波器構成的頻率合成器。
  14. 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。
  15. According to the actuality of the present research on ct, this paper introduces the measurement principle of rogowski coil and analyzes the factor that influence the precision of measurement, we bring forward a new design scheme based on the rogowski coil

    本文首先介紹了國內外電流互感器發展現狀，重點對rogowski線圈測量原理進行分析，研究了線圈的穩態測量誤差以及幅頻特性、相頻特性、暫態時間響應特性，論證了羅氏線圈作為傳感器單元所具有的優良特性。
  16. Error related to the model establishing and screen cover is studied in both theoretical and experimental way. according to the causation of the error, the adjustment part is adopted in the processing of signal. in addition, the characteristics between amplitude and frequency are also analyzed

    本文重點對影響rogowski線圈測量的諸多因素進行分析，研究了線圈的穩態測量誤差以及幅頻特性、相頻特性、暫態時間響應特性，論證了羅氏線圈作為傳感器單元所具有的優良特性。
  17. Phase - frequency response characteristic

    相頻特性
  18. Phase - frequency characteristics

    相頻特性
  19. Frequency - phase characteristic

    相頻特性
  20. It ' s an important factor to measure phase difference for studying phase frequency characteristics of the network

    摘要相位差的測量是研究網路相頻特性的一個重要方面。
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