figure of noise 中文意思是什麼

figure of noise 解釋
噪聲系數
  • figure : n 1 外形，形狀，外觀；姿態。2 畫像，塑像。3 圖形，圖案；插圖；圖表。4 人影，人形；人物。5 風度，...
  • of : OF ＝Old French 古法語。
  • noise : n 1 聲音，聲響。2 叫喊；嘈雜聲，噪音；喧鬧聲；吵鬧，騷動，騷擾。3 〈古語〉謠言，風聲。4 〈美國〉...
  1. According to the application background and the dismatch between single antenna and differential lna, an active balun is needed and has been designed. then we put forward a design scheme that does co - simulation of an active balun and a differential lna on one chip together. at 2. 45ghz, this lna provides a forward gain of 28. 931db with a noise figure of 2. 485db, while drawing 19. 1ma from a 1. 8v supply

    從本設計的應用背景出發，考慮到單端天線與差分lna之間的不匹配性，設計了一個介於兩者之間的有源平衡轉換電路? balun （ balance - unbalunce ） ，並提出了將這個balun電路與前面設計的差分lna作為一個整體進行了模擬的設計方案。
  2. The in - depth analysis of the noise in gilbert mixer including parasitical capacitors, in which the mixer and lna have been connected together and the noise figure of mixer can be expressed explicitly as that of lna

    回在包括寄生電容的情況下，對雙差分對混頻器（ gilbertmixer ）的噪聲性能做了深入分析，把混頻器和低噪放聯系在一起，可像低噪放一樣，直觀的表達混頻器的噪聲系數。
  3. By utilizing the comb - like reflection spectrum of a hi - bi fiber loop mirror to suppress the ase ( amplified spontaneous emission ) of a double - pass edfa, the noise figure of this amplifier is much improved

    利用雙折射環鏡的梳狀反射特性抑制雙通edfa的ase ，從而使放大器的噪聲性能得到了明顯改善。
  4. We illustrate the wavelet package analysis that can obtain the time - frequency distribution figure of noise signal, which can be used to define gray - image. through image - average, we can get the standard time - frequency distribution images of different main bearing gap. based on that, a main bearing wear fault diagnosis model using image matching is set up

    然後對圖像進行平均，得到主軸承在不同間隙狀態下的「標準」時頻分布圖，建立了柴油機主軸承間隙圖像匹配的故障診斷模型，匹配時所用的參數為兩幅圖像之間的歐氏距離。
  5. A research into the effect of funnel mcp on the relationship between current gain and noise figure

    擴口微通道板對電流增益和噪聲因子關系的影響
  6. It is evident from figure 42 that if a ground network contains loops there is a greater danger of it being vulnerable to emfs induced by external magnetic fields, and of ground current ' escaping " from high current areas to cause noise in sensitive regions

    從圖11 . 42可見，如果存在地線迴路，外界磁場切割地線迴路時容易出現感生電動勢，大電流電路會「四處流竄」 ，影響精密電路。
  7. During this precess, using the technology of optimizing the widths of both common source mosfet and common gate mosfet under a fixed power, we obtained a compromised result of power consumption and noise figure

    設計過程中，在限定功耗的前提下，主要針對共源晶體管和共柵晶體管的柵寬，對電路的性能進行了優化，使得設計的lna的噪聲系數最小。
  8. Some few minutes had elapsed, and the stranger began to show manifest signs of impatience, when a slight noise was heard outside the aperture in the roof, and almost immediately a dark shadow seemed to obstruct the flood of light that had entered it, and the figure of a man was clearly seen gazing with eager scrutiny on the immense space beneath him ; then, as his eye caught sight of him in the mantle, he grasped a floating mass of thickly matted boughs, and glided down by their help to within three or four feet of the ground, and then leaped lightly on his feet. the man who had performed this daring act with so much indifference wore the transtevere costume

    過了一會兒，此人開始顯示出不耐煩的樣子，正在這時，屋頂的洞口外面發出了一種輕微的響聲，立刻有一個黑影擋住了亮光，那分明是一個男人的身影，那人正在急切而仔細地察看他身下的這一大片地方，當他看到那個穿披風的人時，他就抓住一簇向下飄垂密密地纏結在一起的根須，順著它滑到了離地三四尺的地方，然後輕輕地跳了下來，他穿著一套勒司斐人的服裝。
  9. A novel method based on a map of noise figure and gain is proposed to analyze efficiently the dependence of the noise figure and gain for edfas on the edf length and the pump power. the characteristics of various edfas are studied and compared. secondly, some important parameters are introduced to describe the characteristics of edfas

    文中從理論上系統分析設計了結構參數對各種edfa性能的影響，最後通過實驗驗證；第四，針對波分復用系統要求edfa必須具備增益鎖定功能，提出採用單根光纖光柵的方法來箝制l - bandedfa的增益。
  10. The methods and the experimental setups for measuring the gain and noise figure of an edfa are emphasized. we introduce how to measure the characteristics of each component of an edfa, especially the gain and absorption coefficient of an erbium doped fiber ( edf ). thirdly, four types of simple and novel l - band edfa structures with low noise, high gain and low gain ripple are proposed to satisfy the requirement of a dwdm system

    基於考慮自發輻射噪聲（ ase ）的giles模型，建浙江大學博士學位論文立了這種edfa的全光增益箱制理論模型;理論和實驗分析了四種可能的光路結構、泵浦波長、光纖光柵反射波長和反射率、泵浦功率以及摻餌光纖長度等參t對其箱制特性的影響。
  11. Secondly, a method which can prejudge the gain and noise figure of the low noise amplifier ( lna ) is put forward. with this method, we can prejudge the feasibility of lna design once the s - parameter and noise parameter of the device are gained. the design process is considerably simplified compared with traditional methods

    隨后對低噪聲放大器進行了探討，提出了一種可預測增益和噪聲系數的方法，只要知道器件的s參數和噪聲參數，就能對放大器設計的可行性進行預測，相對于傳統作法，設計過程得到了大大簡化。
  12. Verification regulation of noise figure meter

    噪聲系數測試儀
  13. 3. the effects of gain and noise figure of raman amplifier based on high nonlinear mof are theoretically studied

    3 、對基於高非線性微結構光纖的拉曼放大器進行了理論研究。
  14. Testing methods of noise figure for marine radar receivers

    船用導航雷達接收機噪聲系數測試方法
  15. This paper studies the design methods and techniques of the broadband lna. using negative feedback techniques and lossy match method, a broadband lna acceptable for sdr is presented. the measured results showed that over 30mhz ~ 3000mhz, the lna achieved a maximum noise figure of 2. 0db, a power gain of 22db with gain flatness of less than 2. 0db

    本文最後對寬帶低噪聲放大器的設計方法進行了詳細探討，並運用負反饋技術和有損匹配的方法，研製了一種適合軟體無線電應用的寬帶低噪聲放大器，經測試，在30 3000mhz頻率范圍內，噪聲系數nf 2 . 0db ，增益g = 22db 2 . 0db 。
  16. Lowest noise figure of a rf transistor is not normally where the input is perfectly matched

    射頻晶體管的最低噪聲系數通常不在輸入完全匹配的地方。
  17. How to reduce noise figure of operational amplifier are studied in this paper. through design of a low - noise opa, introduce low - noise design of the input stage in detail. and with the analysis of computer, suitable sizes of the input apparatus are choosed. at last, by simmulation and verification on this opa, the result is satisfied

    研究了如何從電路結構上減少運算放大器的噪聲，以一種低噪聲運放為例，著重介紹輸入級設計，並藉助計算機分析選擇合適的輸入器件尺寸，最後通過對運放噪聲的模擬驗證，得到了滿意的結果。
  18. Simplified theoretical model describing mof raman amplifier has been builded on our own, and simulation program has also been developed. the effects of gain and noise figure of mof raman amplifier with

    分析了泵浦方式和損耗對放大器增益和噪聲特性的影響，並對其增益飽和特性進行了研究。
  19. The average noise figure of the double - pass l - band edfa based on hi - bi fiber loop mirror is 3. 7db lower than that of the one based on a common fiber loop mirror

    基於雙折射光纖環鏡的l - bandedfa比用普通光纖環鏡的放大器的平均噪聲低3 . 7db 。
  20. Use eda software to simulate the optimization z sand z l in pa designation. 3. theoretically deep analysis is made which is about the method of lna design, analysis the affect of noise figure and input vswr to the system sensitivity and the contradiction between the two parameter

    3 .從理論上低噪放設計方法進行深入的研究，系統的分析低噪放的輸入駐波比和噪聲系數這兩項指標對接收機系統靈敏度的影響以及兩者之間的矛盾。
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