降壓放大器 的英文怎麼說

中文拼音 [jiàngyāfàngdàqì]
降壓放大器 英文
step down amplifier
  • 降 : 降動詞1. （投降） surrender; capitulate 2. （降伏） subdue; vanquish; tame
  • 壓 : 壓構詞成分。
  • 放 : releaseset freelet go
  • 器 : 名詞1. （器具） implement; utensil; ware 2. （器官） organ 3. （度量; 才能） capacity; talent 4. （姓氏） a surname
  • 放大器 : amplifier; pantograph; lawnmower; enlarger; magnifier
  • 放大 : amplify; magnify; boost; enlarge; blow up; gain; amplification; enhancement; multiplication; magn...
  1. The fault that the series resistor has high value can be avoided by using the constant current amplifier, and the fault that the dividing resistor reduces the working voltage of the speaker can be avoided by using the constant voltage amplifier

    使用恆流功放，可以避免傳統方法中串聯電阻取值過大的缺點；使用恆壓功放，可以消除分壓電阻降低揚聲器工作電壓的不足。
  2. At last, control circuit of one cycle controlled bridge switching power amplifier is improved with the basic idea of one cycle control. the simulation results show that the amplifier of improved control circuit not only solve the question of output dc offset, but also keep the voltage gain lowered by voltage compensation technique

    最後，根據單周控制的基本思路，改進了單周控制的全橋開關功率放大器的控制電路。模擬結果表明，改進控制電路后的系統不但解決了輸出直流偏置問題，而且解決了電壓補償方法所造成的放大器增益下降問題。
  3. 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。
  4. At the initial stage of planar technique, b was employed as ideal diffusion impurity in base - region of npn si planar devices because of the match of its solid - solubility and diffusion coefficient in si with those of p in emission - region, and the good shield effect of sio2 film to b. but because of the relatively large solubility ( 5 1020 / cm3 at 1000 ) and the small diffusion coefficient, the linear slowly - changed distribution of acceptor b in pn junction can not be formed, which could not cater to the requirement of high - reversal - voltage devics. thereafter b - a1 paste - layer diffusion technology and close - tube ga - diffusion technology had been developed, while the former can lead to relatively large the base - region deviation and abruptly varied region in si, which caused severe decentralization of current amplification parameter, bad thermal stability and high tr ; the latter needed the relatively difficult pack technique, with poor repeatability, high rejection ratio, and poor diffusion quality and productio n efficiency

    在平面工藝初期，由於b在硅中的固溶度、擴散系數與n型發射區的磷相匹配， sio _ 2對其又有良好的掩蔽作用，早被選為npn硅平面器件的理想基區擴散源，但b在硅中的固溶度大（ 1000時達到5 10 ~ （ 20 ） ，擴散系數小， b在硅中的雜質分佈不易形成pn結中雜質的線性緩變分佈，導致器件不能滿足高反壓的要求，隨之又出現了硼鋁塗層擴散工藝和閉管擴鎵工藝，前者會引起較大的基區偏差，雜質在硅內存在突變區域，導致放大系數分散嚴重，下降時間t _ f值較高，熱穩定性差；後者需要難度較大的真空封管技術，工藝重復性差，報廢率高，在擴散質量、生產效率諸方面均不能令人滿意。
  5. In this circuit, reference current sources are used to charge and discharge capacitors. this oscillator ’ s output is very ideal through control circuit under 5. 7v reference voltage, and oscillator ’ s frequency and duty - cycle could be adjusted if reference current source or capacitors in the circuit was adjusted. and the changes of temperature and voltage affect stabilize of the frequency little

    此電路利用系統內部基準源產生的電流信號來對電容進行充放電，然後經過控制電路作用后，產生的輸出振蕩波形的上升時間和下降時間非常小，更接近理想矩形波形;通過調節基準源電流信號或者電容值大小，可調節振蕩波形的頻率和占空比，同時溫度和電壓的變化對振蕩器輸出波形頻率穩定度的影響很小。
  6. As a visiting scholar, he worked in the university of gothenburg studying the acupuncture - like somatic nerve stimulation - induced long - lasting depressor response in spontaneously hypertensive rats, the characteristics of the cardiac receptors of the spontaneously hypertensive rats, and the characteristics of the non - myelinated fibers from the carotid sinus baroreceptor of the rabbit

    在瑞典工作期間，他研究了刺激軀體神經對自發性高血壓大鼠的降血壓作用高血壓大鼠心臟感受器的特性家兔頸動脈竇壓力感受器c類傳入纖維放電的特徵等。
  7. While low voltage and low power is realized when designing the operational amplifier in this text, great efforts have been devoted to increasing the input common mode range and the swing of output signal, and lowing the output resistance at the same time

    只是實現低壓低功耗而不實現良好的性能顯然是錯誤的。本文在設計實現低壓低功耗的運算放大器的同時，也想法提高輸入共模範圍和輸出信號的幅度，同時降低輸出阻抗。
  8. Using sige bicmos darlington configuration as the input stage, the input resistance is increased by the mos devices while the transconductance of sige hbts is maintained. in the same time, the equivalent input noise is controlled well because of the sige hbts ’ good noise performance in the input stage

    輸入級的設計採用sigebicmos達林頓結構，在保留sigehbt高跨導優勢的基礎上充分利用mos器件來提升運放輸入電阻，此外，基於輸入級中sigehbt良好的噪聲特性，運放的輸入參考噪聲電壓可以大大降低。
  9. According to the requirements to pd pattern auto - recognition, this paper studies systematically the basic theories and realizable methods for auto - recognition of pd gray intensity image : ( 1 ) in the requirement of on - line pd monitoring for transformer, several discharge models are designed and the relevant experiment methods projected. with discharge model tests, a lot of discharge sample data is acquired. on the base of systematical research on recognition for pd gray intensity image, this paper puts forward two kinds of fractal features, the 2nd generalized dimensions of original pd images and fractal dimensions of high gray intensity pd images, and then the relevant extraction methods

    針對局部放電模式自動識別的需要，作者系統地研究了局部放電灰度圖像自動識別中的基本理論和實現方法： （ 1 ）根據變壓器局部放電在線監測的要求，設計了放電模型和實驗方法，並通過模型實驗獲得了大量放電樣本數據，為構造局部放電灰度圖像和採用bpnn進行識別作好準備； （ 2 ）研究了局部放電灰度圖像的構造方法以及降維構造32 32灰度和矩陣的方法；在用人工神經網路對局部放電進行模式識別時，分析了bp網路的優缺點，對典型bp網路的結構和學習訓練演算法提出了改進，採用帶有偏差單元的遞歸神經網路作為模式分類器；採用32 32灰度和矩陣進行bpnn識別結果表明這種方法是有效的。
  10. The lower supply also makes the dynamic range of signal reduced. this requires the op - amp a rail - to - rail input and output stage

    電源電壓的降低也使得信號的動態范圍極大減小，這就要求運算放大器能做到輸入軌對軌和輸出軌對軌。
  11. The emergency - use electrically powered stretcher eximobiler 5000sp is the first device of its kind to replace the conventionally manual type or hydraulic type system for raising and lowering the mattress height and head section height with an electrically powered system

    急救用電動擔架5000sp摒棄了以往的手動式和油壓式首次採用電動式控制，只需輕輕一按遙控器就能實現升降及床頭抬放操作，大大減輕了醫生和護士的負擔。
  12. In fact, it is more effective in system level. low power technique of microprocessor is composed of clock - gating, close part of cache, and dvs ( dynamic voltage scaling ). low power technique of peripheral equipments design is composed of closing the idle parts of the equipment and degrading the service quality satisfied with lowest requirement

    處理器的低功耗設計大都採用系統級，其技術主要包括:門控時鐘技術， cache部分關閉技術，動態電壓縮放dvs （ dynamicvoltagescaling ）技術;外圍設備低功耗設計包括:關閉設備空閑部件;在滿足基本性能要求前提下，降低外圍設備的服務質量。
  13. In this paper, we developed three novel immunosensors and a mediator - free enzyme sensor, based on efficient immobilization of biomolecule and signal - amplified methods to improve detection sensitivity and decrease the detection limit. the detailed materials are shown as follows : ( 1 ) an amplified immunosensor with highly sensitivity has been proposed based on precipitation of an insoluble product on functionalized electrode ( in chapter 2 ). anti - higg was immobilized onto the surface of gold electrode modified with 1, 6 - hexanedithiol and colloidal au interface

    本文結合有效的生物活性組分的固定方法，採用信號放大技術提高分析信號、降低檢測下限，發展了三種新型的免疫生物傳感器以及一種無電子媒介體的酶生物傳感器，主要內容如下: （ 1 ）提出了一種新型的基於酶催化沉積質量放大的高靈敏壓電免疫傳感器（第2章） 。
  14. The standard bi - state magnetic bearing amplifier have some disadvantages such as high current harmonics, low reliability and the current mode switching for tri - state amplifier is expounded. the ba

    從降低系統成本和提高可靠性的角度，提出了一種採用空間電壓矢量控制的開關功率放大器，對其進行了模擬研究，指出了這種功放的應用前景。
  15. In contrast to pulsed discharge without preionization, the working voltage of the laser falls about 20 % and the electro - optical efficiency is improved approximately 30 %

    和無預電離的脈沖放電相比，激光器的工作電壓下降了大約20 ，電光轉換效率提高了大約30 。
  16. In the analog ic, one of the typical circuits is operational amplifier. therefore, the design of low - voltage and low - voltage operational amplifier is very necessary. while realizing low - voltage and low - power, it must be noticed for the implementing of the main function of the circuit. because the low supply voltage affects performances of circuits, it is not very good for just implementing low - voltage and low power but not implementing the good performances

    在模擬集成電路中，運算放大器是最典型的電路之一，所以設計低電壓低功耗的運算放大器是非常必要的。在實現低電壓低功耗的過程中，必須考慮電路的主要性能的實現，因為電源電壓的降低將影響電路的性能，只是實現低壓低功耗而不實現良好的性能是不大妥當的。
  17. This type of capacitor has an assembling full - sealed structure, and it is comprised of capacitor unit body, contain - er, insulation cooling impregnant, outlet ceramic bushing, pressure - releasing valve and temperature controller etc. the internal insulation cooling impregnant is isolated from external atmosphere so as to avoid aging of impregnant and ingress of moisture

    全密封集合式並聯電容器主要由電容器單元組成的器身波紋油箱絕緣冷卻油出線套管支持絕緣子壓力釋放閥及溫度控制器等部件構成。採用波紋油箱增大散熱面積降低產品溫升。
  18. 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。
  19. If the speaker needs more current ( its overall impedance drops ) then a lower amplifier output impedance will allow that current to be drawn out of the amplifier without causing much of a change in the applied voltage - and that means less distortion

    如果揚聲器需要更大電流（揚聲器的整體阻抗降低） ，那麼一個低輸出阻抗的放大器可以容許在輸出相應電流的同時，所施加的電壓變化更小，這也意味著失真更小。
  20. If the speaker needs more current ( its overall impedance drops ) then a lower amplifier output impedance will allow that current to be drawn out of the amplifier without causing much of a change in the applied voltage - and that means [ i ] less [ / i ] distortion

    如果揚聲器需要更大電流（揚聲器的整體阻抗降低） ，那麼一個低輸出阻抗的放大器可以容許在輸出相應電流的同時，所施加的電壓變化更小，這也意味著失真更小。
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