loop amplifier 中文意思是什麼
loop amplifier
解釋
環線放大器-
This paper starts the research of the liquid floated pendulous accelerometer testing system according to the engineering. at first, this paper gives the brief introduction of the history and present status of accelerometer and its testing technology, the working principium and math model of the liquid floated pendu - lous accelerometer, and then, decides the binary width pulse force retrim loop as the design proposal of testing system, researches the transfer function of every part in the system emphasizly, analyses the stability of the whole accelerometer testing system from the angle of control theoretics by the open loop transfer function of system, and designed the correcting net, analyses the basal problems such as resolution, sampling restraint, precision and so on, designs the hardware testing circuits such as preamplification, band - pass filter, alternating amplifier, phase sensitive demodulatorn, pulse - width modulation, frequency scale circuit, moment current generator. finally, using the graphics program language labv - iew which is designed for testing field especially by ni accomplishes the solfware design of testing system, realized the testing functions
首先對加速度計及其測試技術的發展歷史和現狀，液浮擺式加速度計的工作原理和數學模型等作了簡要的介紹，然後確定了以二元調寬脈沖再平衡測試迴路為設計方案，並從控制理論的角度進行了分析，著重研究了系統中各部分的傳遞函數，利用系統開環傳遞函數分析了系統的穩定性，同時設計了系統的校正網路;分析了二元調寬脈沖再平衡測試迴路的解析度、采樣約束以及測試精度等基本問題，並按照系統分析的結果設計了包括前置放大、帶通濾波、交流放大、相敏解調、脈寬調制、頻標電路以及力矩電流發生器等測試系統各部分硬體電路，驗證了電路的正確性，最後按照測試系統的要求，採用了美國ni公司專為測試領域所開發的虛擬儀器工具? ? labview作為測試軟體開發工具，利用該圖形化編程語言完成了測試系統軟體部分的設計，實現了測試功能。 -
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。 -
An instrumentation amplifier is a closed - loop gain block that has a differential input and an output that is single - ended with respect to a reference teminal. it must amplify the differential input acurately and suppress any unwanted common - mode signals
儀表放大器是一種能精確放大兩輸入端之間的差模信號而抑制任何共模信號，並將差分輸入轉換為單端輸出的放大器。 -
The synchronous rectifying and low power sampling technology is used to reduce the power consumption, flexible external loop compensation, error amplifier output clamp are adopted for better system large signal response. the piecewise slope compensation technology is employed to minimize the consequence of over compensation. the sensor resistor is externally connected, which realize output voltage programmable. the overheat protection and under voltage protection modules are integrated in the die to allow the reliable operation of the system
同時，電路設計採用同步整流技術、低功耗電流采樣技術降低功耗，提高轉換效率;採用靈活的外部環路補償技術、誤差放大器輸出嵌位技術以實現良好大信號特性;採用分段斜坡補償技術，消除不穩定因素，並最大程度地減小過補償帶來的問題;採用外接輸出采樣電阻的方式，實現輸出電壓的可編程。 -
The actively and passive mode - locked fiber ring laser and two types of photonic switching, slalom ( semiconductor laser amplifier loop mirror ) and uni ( ultrafast nonlinear interferometer ) were developed. this thesis presented the principle and the requirements for the optical of frequency - shift sampling module under common conditions
研製了作為光取樣脈沖源的主動鎖模和被動鎖模光纖激光器；半導體光放大器環鏡及超高速非線性干涉儀的光子開關，並進行了頻差法光取樣、異步光取樣及基於時分光取樣的光子模數轉換的實驗研究。 -
This paper presents the general project design firstly, and then introduces the system hardware circuit design in detail which includes the choice of chips, the loop filter parameters computation and the design of the power amplifier ' s peripheral matching circuit
在介紹了系統總體方案設計之後，本文詳細介紹了系統的硬體電路設計，包括晶元的選擇，環路濾波器參數的設計，以及功率放大器外圍匹配電路的設計。 -
2. the input stages of the ccii and the operational amplifier in transimpedance implifier are realized with folded cascode amplifier to reach high cmrr, large open loop gain and low offset
2 .為了提高儀表放大器的電源抑制比，並得到大的開環增益，相對低的失調等性能，電流傳輸器的輸入級和跨阻放大器中運算放大器輸入級均採用折疊共源共柵放大器。 -
Translinear loop current amplifier
水三元液系相圖 -
By means of comprehensive study of the whole process to derive the calculation of relative gain variation, a mathematical formula how to make a well - founded understanding and correct use of the differential calculation method when making every efforts to accurately calculate the relative variation of the closed - loop gain of an amplifier was advanced based on another accurate calculation method given
因此，本文通過全面考察推導增益相對變化量的計算全過程，根據所給出的另一種準確計算方法，重點提出了在要求準確地計算放大器閉環增益的相對變化量時，怎樣正確理解和運用微分計算方法的數學表達式。 -
This research about the uhf frequency synthesizer mostly includes the following parts : 1 ) the dds modules include the dds ad9852 part, the lc band pass filter design part, the amplifier design part and lc low pass filter part. 2 ) the pll modules include the design of the loop filter which is the core of pll, lc band pass filter design and the amplifier design. 3 ) the controller modules of the system include the part of pc rs - 232 com port communication with the mcu and the part of the process of controller about urat and mcu
本課題的研究主要包括以下幾個方面的內容: 1 ） dds模塊設計:包括ad9852部分、 lc帶通濾波器設計部分、放大器設計部分; 2 ） pll模塊設計:包括pll關鍵部件環路濾波器設計、 rflc帶通濾波器設計、末級放大器設計部分; 3 ）控制模塊設計:包括計算機與單片機串口通信的電路設計部分以及程序設計部分。 -
The current in the dac ’ s output can drive the load, and the structure can save a buffer consisted of operational amplifier, so the structure can achieve high speed with no close - loop and feedback in this circuit
該10位分段式電流舵型數模轉換器的輸出端可直接用電流輸出來驅動負載阻抗，省去運算放大器構成的輸出緩沖，整個電路中沒有形成閉環和反饋，因此這種電路結構可以達到很高的速度。 -
Third, rail - to - rail amplifier output stages exhibit load - dependent gain which affects amplifier open - loop gain, and hence closed - loop gain accuracy
第三，軌到軌放大器輸出級增益與負載有關，這將影響放大器的開環增益，當然也影響了閉環增益的準確性。 -
The hall zero - magnetic flux principle ( ie. a closed - loop principle ) is adopted to deduce the formula of the steady - state error for the hall zero - magnetic flux system, and the conclusion that the larger the amplifier amplification in the hall zero - magnetic flux system, the smaller the steady - state error is reached
摘要採用霍爾檢零原理（即閉環原理）推導出了霍爾檢零系統的穩態誤差表達式，得出了在霍爾檢零系統中放大器的放大倍數越大穩態誤差越小的結論。 -
In order to deal with the nonlinearity and hysteresis of piezoceramics, a precise power amplifier circuit with charge - feedback loop was developed. and an electromechanical model of piezoelectric actuator is presented to demonstrate that charge - feedback control is prominently effective to reduce hysteresis, creep and to improve linearity
本文針對壓電陶瓷存在非線性與滯后的問題，根據電荷反饋原理設計了精密功率放大電路和電荷反饋迴路;建立了壓電作動器的機電模型，證明了電荷反饋控制對于減小回滯現象、提高線性度有明顯的作用。 -
According to the structure characteristics and motion rules of the new type nursing robot, the close loop control system of this new type nursing robot is designed and made with the virtual instrument developing software labwindows / cvi, mcu, piezoelectric ultrasonic motor and high precision optical incremental encoder, which can make the robot reset and rotate by the predefined tracks. at the same time, in order to make the nursing robots used more widely where intensity, precision and price are not high, another control system is designed with the step motor, virtual instrument developing software labwindows / cvi, multi - function daq card pci1711, linear power amplifier. in order to use the nursing robots in acupuncture therapy, a simple finger is designed
在對其結構特點和運動規律分析的基礎上，本文以虛擬儀器編程語言labwindows / cvi為軟體開發工具，以單片機為控制核心，以超聲電機為驅動元件，以高精度光電編碼器作為速度和角位移檢測裝置，實現了機械臂的復位以及預定軌跡的閉環控制系統的開發;同時為適應一些強度不大、精度要求不高的應用場合，也為降低成本，簡化控制裝置，推動新型護理機械臂短期內應用推廣的需要，以目前應用較為廣泛、控制技術較為成熟的步進電機為驅動元件，用labwindows / cvi開發環境、 pci1711數據採集卡以及線性功率放大器開發了一套控制系統，實現了手臂的復位、勻速運動以及預定軌跡的控制系統;為推廣護理機器人在針灸理療中應用，設計了簡單的手指機構並利用labwindows / cvi開發環境，以及智能材料驅動器? ?層疊式壓電驅動器，進行了手指的抓取以及對驅動對象的轉動控制。 -
The cancellation performance ( cp ) of cancellation loops, which constitute the feed - forward amplifier system, is investigated mathematically and the simulation results are given. the effects of amplitude imbalance, phase imbalance and delay mismatch on the cancellation performance of a cancellation loop are fully analyzed
本文分析了前饋功率放大系統中抑制環路的工作原理；推導了幅度失配、相位失配、延遲失配對環路抑制能力的理論解析式，並進行了模擬研究。
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