small signal current 中文意思是什麼
small signal current
解釋
小信號電流-
For micro - cavity semiconductor laser, station model is proposed in this paper and its steady - state and instantaneous characteristics when the coupling efficiency of spontaneous emission into a lasing mode is equal to 1 are analysised. for current noise, sp noise, noise, p noise, as well as current modulation, sp modulation, modulation and p modulation, using small - signal approximation, we derive the laser ' s corresponding transfer functions. and we calculate their signal - to - noise ratio ( snr ) gain in various parameters through frequency domain analysis in the premiss of large input snr
本文對于微腔半導體激光器，提出站模型，能夠較直觀簡潔地分析微腔半導體激光器的穩態和瞬態特性，利用此模型對具有重要實用價值的= 1的微腔半導體激光器進行了討論；對于電流i噪聲、自發發射壽命_ （ sp ）噪聲、自發發射因子噪聲、光子壽命_ p噪聲，以及電流調制、 _ （ sp ）調制、調制、 _ p調制，在小信號近似下，得到了相應的激光器的傳遞函數；在大信噪比的前提下，對激光器進行了頻域分析，分別計算了它們在不同參數下的信噪比增益，分析了其抗噪聲性能。 -
The input signals pass through the prepositive circuit which transforming the measured signals ( voltage or current ) into small voltage signals, the signal adjust circuit consist of programmable - gain amplifier and filter, and digital signal processor tms320lf2407 for data acquisition and processing in turns. provide the measuring results on lcd module. and also can transfer data to the pc ’ s rs232 for farther analyse
採用前置電路將被測信號（電壓或電流）變換為小電壓信號，經過信號調理電路對信號進行程式控制放大和濾波后，通過tms320lf2407實現信號的數據採集、信息處理和計算，將測量結果通過液晶模塊顯示，還可經過rs232介面與計算機進行數據傳輸，做進一步的分析和應用。 -
The bias magnetic field of the bias coil driven by bias current and small signal test current, results in the induced signal of the control coil. the terminal voltage of the control coil is detected by the test circuit. then the signal containing the information of rotor displacement is obtained, from which we can get the dc voltage signal proportional to the rotor displacement through half - wave rectification circuit and low pass circuit. this dc signal is put into a pid controller to get the control signal of the rotor displacement
偏置測試電路向偏置線圈輸入偏置電流和小信號測試電流，兩者產生的偏置磁場在控制線圈產生感應信號，檢測電路檢測控制線圈端電壓並提取含有轉子位移信息的電壓信號，該信號經半波整流電路和低通濾波電路后得到與轉子位移成正比例的直流信號，再由pid控制器轉換為轉子位移的控制信號，最後控制信號輸入功放電路產生控制電流，實現閉環控制。 -
In gan hemt drain pulse current collapse experiments, drain current under pulse condition collapsed about 50 % than direct current condition and the pulse signal frequency affected little on current collapse. when gate voltage is small, the relationship between pulse width and drain current is i0 ( + t / 16 )
在ganhemt漏極脈沖電流崩塌測試中，發現脈沖條件下漏極電流比直流時減小大約50 % ;脈沖信號頻率對電流崩塌效應影響較小;當柵壓較小時，隨著脈沖寬度的改變漏極電流按i0 （ + t / 16 ）的規律變化。 -
Become a kind of new electronics circuit - current - mode circuit. it is replacing the traditional design method of the voltage - mode in the high frequency high - speed signal processing realm 。 this thesis mainly discussed the modified second - generation current conveyors based on the current - mode kinds of new cuicuit components, they are stronger modified standard current - mode parts in fuctions on this foundation. mainly including the modified differential difference current conveyor ( mddccii ) 、 the fully balanced second generation current conveyor ( fbccii ) 、 ( full balances ) four - terminal floating nullor ( fbftfn ) and the current differencing buffered amplifier ( cdba ), they are all function very strong standard current - mode parts, they all can provide some circuit functions of better than general operation amplifier, because they have the voltage importation and the current importation, therefore use it since can carry out the voltage - mode signal processing circuit expediently, can also carry out the current - mode signal processing circuit expediently, and have to increase the benefit bandwidth to accumulate more widely than the voltage - mode, but have their advantages more according to the current - mode filter of the modified current conveyor, because it constitutes in brief, the filter wave function is stronger and they are better than in general use operation amplifier of many advantages, be easy to composing for example 、 high speed 、 frequency bandwidth 、 the power supply voltage requests low 、 consume small, the impedance is different from etc. advantages, otherwise they have biggish dynamic range, and flexible circuit synthesize, so they are the best active parts
從第二代電流傳輸器ccii入手，重點研究了以下幾種改進型的第二代電流傳輸器:改進的差動差分電流傳輸器mddccii 、全平衡第二代電流傳輸器fbccii 、多輸出四端浮地零器ftfn 、全平衡四端浮地零器fbftfn 、電流差分緩沖放大器cdba的電路結構及其模型。然後在此基礎上系統地研究了基於這幾種改進型的第二代電流傳輸器的濾波器的設計方法，主要方法和結果如下:利用mddccii設計了差分式連續時間電流模式低通、帶通濾波器;電流模式跳耦結構考爾低通濾波器;利用fbccii設計了帶通二階節濾波器及電流模式雙二階通用濾波器;設計了基於多輸出端ftfn的電流模式二階通用濾波器電路;通過數字化開關選擇的基於fbftfn的電流模式通用濾波器;設計了基於最少個數電流緩沖放大器（兩個cdba ）的多功能通用電流模式濾波器及其在非理想因素情況下分析。設計濾波器的主要方法是採用級聯設計、運算模擬（信號流圖法）和反饋設計（跳耦法） 。 -
Small signal jfets work very well as low - leakage diodes by connecting drain & source together in log current - to - voltage converters and low leakage input protection
在對數電流-電壓轉換器和低漏電流輸入保護電路中，通過連接小信號jfets的漏極和源極，可以使之作為低漏電流二極體很好的使用。 -
In the present paper, according to the characteristics of the dynamic running of the thermoelectric refrigerating devices and its components for the refrigerator is analyzed and the independent components " models are established. the entire model describing the working procedure of the refrigerating system is set up with the method of parameters coupling to combine the models of the refrigerating system, load, cabinet and air in the cabinet. the running characteristics of thermoelectric refrigerators on the effects of received current, load and ambient temperature are investigated using small - signal linearization method
本文根據熱電製冷系統動態運行的特點，分析了電冰箱製冷系統及各個部件的熱物理過程，運用參數耦合的方法把製冷系統、負載、箱體及箱內空氣模型有機地結合在一起，建立了完整的製冷系統工作過程模型，用小階躍信號線性化法分析了電流、負載功率和環境溫度波動共同作用下的熱電製冷器工作特性。 -
The technique of paralleling current sharing of switching power is introduced ; the small signal model of the single dc / dc module and the multi - module is analyzed
文中介紹了電源並聯運行的各種均流技術，對單模塊dc dc電源和多模塊電源並聯運行進行了小信號分析。 -
One is to use fourier transformation to convert the source signal from time domain to frequency domain and to discard high frequency harmonious components upwards of 19 ( gb / t14953 - 93 d5. 3 demanding ), then to have static huffman coding to the quantized char array which is composed of reserved direct current component and basic wave and each high frequency " s amplitudes and angles. the other is to use discrete wavelet transformation to convert the source signal from time domain to frequency domain and to set the high frequency coefficients that its absolute value is smaller than the given threshold to zero, then to have dynamic huffman coding to the quantized char array which is composed of multiple, wavelet ' s level, datum length, low frequency coefficients and reserved high frequency coefficients. mass simulinks and analyses under the two circumstances have done to show that data compression ratio is small and the relative error is also small and within the permission of engineering and the compression problem can be solved in theory of measured datum of power system
第一種情況的壓縮方法為：採用傳統的傅立葉變換把原始信號從時間域變換到頻率域，舍棄20次及其以上的高次諧波成分（保證了gb / t14953 ? 93d5 . 3要求） ，然後對保留的直流分量、基波和各次諧波的幅值和相角數據量化后和量化時分別乘以的倍數系數構成一個數組，以字元形式保存，採用靜態huffman編碼對變換數據進行壓縮；採用離散小波變換把原始信號從時間域變換到頻率域，然後對分解得到的高頻系數進行閾值量化處理，對乘以的倍數系數、小波變換的階數、小波變換后的低頻、各級高頻以及原始數據長度、量化后的低頻系數以及保留的高頻系數大小、位置構成一個數組，以字元形式保存，採用動態huffman編碼對這個文件進行壓縮。 -
The lower resistance should select properly, too big to make radio frequency signal drive collector current too little, too small to make amplifier instable easily
下偏電阻要選取適中，過大會使射頻信號推動集電極電流的能力過小，過小容易使放大器不穩定。 -
Finally, the influence the radius of the electron beam, current of the electron beam, the acceleration voltage and the geometrical dimension of the slow - wave structure on small signal gain are discussed
研究表明：對應最大的增益，有一飽和電壓存在；小信號增益隨電子注電流的增大而增大；也隨電子注半徑的增加而增大。 -
Wavelet transformation technology is applied to the small - current sensor, and the constructed pulse - respone function of the surface - acoustic - wave transducer is comsidered as a wavelet function, thus the surface - acoustic - wave type of element for wavelet - transformation and reconstruction is manufactured to filter the jamming signal of the small - current sensor effectively
把小波變換技術應用到小電流感測器中，構造的聲表面波換能器脈沖回應函數等於小波函數，從而製造出了聲表面波式小波變換及重構器件，該器件可有效濾除小電流感測器的干擾信號。 -
The general transfer functions of pwm converter are developed and the small - signal transfer functions controlled by the duty cycle are given using matlab. the voltage adjuster and the current regulator of the control circuit are designed. the isolated cuk converter is analyzed and the features and the description of the uc3854 are presented in detail
論文分析了帶隔離變壓器的cuk變換電路，介紹了平均電流型功率因數校正晶元uc3854的結構、功能；根據uc3854的具體特點與要求，以設計一個具體、實用的帶pfc功能的開關電源為例，設計、計算了主電路電感l1 、 l2 、 c1 、 c2 、隔離變壓器以及電壓、電流調節器電路的參數及要求。 -
The principle of the fault distance measurement for small current grounding system by injecting dual frequency signal are discussed from many aspects such as the method and the characteristic of the signal, the test of the signal, the method of the line select, the algorithm of the fault distance measurement, and the method of the fault location, etc. the task adopts this kind of principle, in which the signal injection is completed by the coupling between the power source and the pt
在詳細地說明以上三種測距演算法的基本原理后，分析各種演算法的優缺點，從注入信號的方法、特徵，注入信號的檢測，接地選線的方法，故障測距的演算法，及故障定位的方法等多個方面，論述了本課題採用的應用於小電流接地系統的雙頻信號注入式測距原理。其中，信號的注入由功率源通過電壓互感器（ pt ）耦合來完成。 -
Faced with the fact that there is a great deal of noise in detecting signal when using small amplitude lasting sine current on field, a developed lease minimum squares method is adopted, which makes the parameters of sine sequence with known frequency picked up on the real time. at the same time, original signal is processed by using wavelet theory, gaining true information which responses to the coating quality
在小幅度正弦恆電流激勵檢測中，針對現場檢測信號含有大量噪聲這樣的情況，採用改進的最小二乘法，實現頻率已知的正弦序列參數的實時提取；同時利用小波理論對原始信號進行處理，得到反映塗層性能的真實信息。 -
At first, the average - current controlled boost pfc and buck converter small - signal model are estabished. the average - current controlled boost pfc and buck converter prototype are designed and manufactured. on basis of the small - signal model, the two - stage i / o impedance characteristic and miller effect are analyzed by simulation with matlab software
其次單獨設計了前級、后級變換器樣機，在兩級模型基礎上，應用matlab軟體模擬分析了前後級變換器對接處的i o阻抗特性和密勒效應，運用奈奎斯特判據對兩級結構寬輸出電壓范圍的功率因數校正器的穩定性進行了分析設計。 -
The paper research small - signal model of pfc circuit and build the simplified average - small - signal model of the system. the thesis develop design method of pi regulators which are applied in double closed - loops system. furthermore, the sampling algorithm of votage and current variables is also analysed in this paper
文中對pfc電路的小信號模型進行了研究，並建立了系統的簡化平均小信號模型，在此基礎上，以系統的動態特性和穩定性為設計指標，具體給出了雙閉環系統中pi調節器的設計方法。 -
The method to obtain the equivalent inductance of im is proposed, and the small - signal model of the peak - current controlled im - fac converter is founded. based on the presented small signal model, the parameter design of the compensator is accomplished
提出im中電感的等效方法，依據電感等效值和建立的峰值電流控制fac變換器的小信號模型完成了採用峰值電流控制的im - fac變換器的小信號分析和補償器設計。 -
The basic principle, system structure is analyzed and studied intently. the small - signal models for the switching converters based on current mode control are deducted. system stability and the principle of slope compensation which is used to improve system stability also discussed
本文首先設計了一款基於電流控制模式的pwm升壓控制晶元，並重點分析了它的工作原理、系統結構，建立了系統的小信號模型，分析了系統的穩定性以及採用斜率補償方法改善系統穩定性的原理，並模擬驗證了斜率補償的作用。 -
In this paper, the important point is the study about the application of wavelet analysis in single phase grounding fault location of small current grounding power systems, wavelet transform is used as a novel tool of signal analysis to obtain useful fault transient components, a new criterion of fault line selection is constructed based on the time and frequency localization character of wavelet transform
本論文主要研究了小波分析在小電流接地系統單相接地故障定位中的應用，利用小波變換這一新興的信號分析工具，提取故障時的暫態電量信息，構造出了基於小波變換模極大值奇異性檢測原理的新型選線判據。
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