放大壓差 的英文怎麼說
中文拼音 [fàngdàyāchā]
放大壓差
英文
increased drawdown-
After analyzing the sense principles and calculation expression for piezoelectricity, we compose a sense network, compare the difference between the voltage amplifier and charge amplifier, give out the electric circuit of piezoelectric sensor for measure system
在分析了壓電片對動態應變的傳感原理和計算表達式后，該系統採用壓電傳感器組建了一個傳感器網路。並且對比了電壓放大器和電荷放大器的差異。Through analysising the characteristics of the power system with floating neutral point deeply, the paper puts forward a new plan of single - phase to ground fault line selection on the base of s ' s signal injecton method and gives the hardware and software design. in this design, the high speed sampling and data processing is carried out through using dsp processor ; the large electrice current is drived through the application of a high - performance audio power amplifier and transformer ; the communication between host computer and detectors is realized through rs485 bus technology ; the difference multilevel frequency - selected amplifier is designed and the feeble signal of space is sampled on the base of the theory of magnetic induction ; the interface between dsp and exterior chip and rs485 interface logical is designed through using fpga ; the using of lcd module and keyboard interfacing chip makes the interface between human and machine ; the programme of host computer and detectors is designed through using blocking design method
在本設計中，採用高速的dsp處理器，實現了對故障特徵信息的高速採集與處理;採用大功率的功放晶元與變壓器配合的方法，實現了大電流信號的驅動輸出;採用485總線技術，組建了裝置主機與多探測器之間的主從式通訊網路，實現了多干擾條件下裝置主機與多探測器的可靠通訊;設計了差分式多級選頻放大電路，採用磁感應的方法實現了對空間微弱信號的接收;利用fpga技術，實現了控制器與多外設的介面及數字信號的串並轉換;採用了先進的lcd液晶顯示模塊及鍵盤介面晶元，設計了人機信息交互的介面;採用了模塊化的軟體設計方法，開發了裝置主機及探測器的軟體程序。Output errors of power amplifiers, hysteresis and creep error of pzts and coupling error among the actuators are the critical factors affecting the motion accuracy of improvement
摘要功率放大器的輸出誤差、壓電陶瓷的洄滯及蠕變誤差、驅動器之間的耦合誤差等是影響機器人運動精度的關鍵因素。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。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。This digital amplifier made up of a digital inverter can implement the sine voltage signal ' s power amplifying based on the digital signal processor. with the high processing ability of dsp, the advanced digital control arithmetic can be realized in the software. also the feasible and effective technique for the time delay compensation of digital control can be achieved
該放大系統用數字化逆變器來實現電力系統正弦電壓信號功率的放大，利用dsp數字處理器高速的處理能力，可以使系統實現高性能的演算法控制，並且能靈活地對系統的誤差進行補償，從而實現逆變系統的高性能和高精度，為解決電力系統電容式互感器二次側帶負載能力弱的問題進行了有意義的研究。The dynamic experiment was tried. the maximal output power, which can be achieved, is 420kw. although there is a distance to the goal of 500kw output power, it still is the maximal power amplification broadcast tube on final stage in our nation
該樣管上整機做動態試驗時，在整機電壓不變的情況下，輸出功率為420kw ，盡管與輸出功率500kw的研製目標尚有一定差距，但也是我國目前輸出功率最大的末級功率放大管。According to negative temperature coefficient of vbe and positive temperature coefficient of vt, a framework of band - gap voltage reference is investigated. the reference offer a source of pir, distributed three voltage, one as upper - threshold voltage of dual - threshold comparator, the other as lower - threshold voltage of comparator, the other as direct current voltage for second band - pass filter amplifier
同時利用pnp晶體管發射結電壓的負溫度特性和發射結差值電壓的正溫度特性設計了一個帶隙基準電壓源。此帶隙基準電壓源本身作為熱釋電紅外傳感器的電源電壓，同時分壓提供雙限電壓比較器的上限電平和下限電平以及第二級帶通濾波放大器的直流電平。The measurement system consist of computer, 16 - channel high speed data acquisition board, spark plug pressure sensor, crank angle signal generator, charge amplifier and oscillograph. the max acquisition frequency of this system is 1mhz
由通用微機、 16通道無相差高速數據採集卡、火花塞式壓力傳感器、角標信號發生器、電荷放大器、示波器組成的高速數據採集系統，最高總采樣頻率為1mhz 。The thesis has done the widespread investigation and study to the domestic and foreign ’ s technologies of analogy low voltage and low power, and analyzes the principles of work, merts and shortcomings of these technologies, based on the absorption of these technologies, it designs a 1. 5v low power rail - to - rail cmos operational amplifier. when designing input stage, in order to enable the input common mode voltage range to achieve rail - to - rail, it does not use the traditional differential input pair, but use the nmos tube and the pmos tube parallel supplementary differential input pair to the structure, and uses the proportional current mirror technology to realize the constant transconductance of input stage. in the middle gain stage design, the current mirror load does not use the traditional standard cascode structure, but uses the low voltage, wide - swing casecode structure which is suitable to work in low voltage. when designing output stage, in order to enhance the efficiency, it uses the push - pull common source stage amplifier as the output stage, the output voltage swing basically reached rail - to - rail. the thesis changes the design of the traditional normal source based on the operational amplifier, uses the differential amplifier with current mirror load to design a normal current source. the normal current source provides the stable bias current and the bias voltage to the operational amplifier, so the stability of operational amplifier is guaranteed. the thesis uses the miller compensate technology with a adjusting zero resistance to compensate the operational amplifier
本論文對國內外的模擬低電壓低功耗技術做了廣泛的調查研究，分析了這些技術的工作原理和優缺點，在吸收這些技術成果基礎上設計了一個1 . 5v低功耗軌至軌cmos運算放大器。在設計輸入級時，為了使輸入共模電壓范圍達到軌至軌，不是採用傳統的差動輸入結構，而是採用了nmos管和pmos管並聯的互補差動輸入對結構，並採用成比例的電流鏡技術實現了輸入級跨導的恆定;在中間增益級設計中，電流鏡負載並不是採用傳統的標準共源共柵結構，而是採用了適合在低壓工作的低壓寬擺幅共源共柵結構;在輸出級設計時，為了提高效率，採用了推挽共源級放大器作為輸出級，輸出電壓擺幅基本上達到了軌至軌;本論文改變傳統基準源基於運放的設計，採用了帶電流鏡負載的差分放大器設計了一個基準電流源，給運放提供穩定的偏置電流和偏置電壓，保證了運放的穩定性;並採用了帶調零電阻的密勒補償技術對運放進行頻率補償。Wide plus fyd multi - channel wind pressure measure transmitter employ import high precision and stability chip, and adopts surface treatment technology of special aluminum alloy and stress isolated technology in the sensor transfer differential pressure signal into ma dc standard signal by precise temperature compensation and amplification treatment
Wideplus - fyd系列多路風壓測量變送器是選用進口高精度高穩定性晶元，並採用特殊鋁合金表面處理技術和傳感器應力隔離技術，經精密溫度補償及放大處理，將差壓信號轉換成420 ma dc標準信號。Wide plus ds series single - channel wind pressure measure transmitter employ import high precision and stability chip, and adopts surface treatment technology of special aluminum alloy and stress isolated technology in the sensor transfer differential pressure signal into ma dc standard signal by precise temperature compensation and amplification treatment
Wideplus - ds系列單路風壓測量變送器是選用進口高精度高穩定性晶元，並採用特殊鋁合金表面處理技術和傳感器應力隔離技術，經精密溫度補償及放大處理，將差壓信號轉換成420 ma dc標準信號。For low distortion, the drains ( or collectors ) of a differential amp " s front - end should be bootstrapped to the source ( or emitter ) so that the voltages on the part are not modulated by the input signal
為了得到低失真，差分放大器前端的漏極（或集電極）應該被引導到源極（或射極） ，這樣埠電壓就不會被輸入信號調制了。In the paper a gmc filter with a cutoff frequency of 29. 8mhz is implemented. an effective improvement is made in cmfb ( common mode feedback ) through using a differential amplifier with four inputs. transconductors are tuned through comparing two voltages, which helps to stabilize the cutoff frequency
文中實現了跨導電容濾波器，其截止頻率達到29 . 8mhz ；採用四輸入端的差分放大器使共模反饋得到了有效的改善；通過簡單的電壓比較實現跨導器的調諧，有助於穩定截止頻率。Some sub - block circuits ( error amplifier, soft - start, enable comparator and under - voltage protection circuit ) are designed and several electrical characteristics are simulated using hspice. finally, the whole chip performance is simulated. and the results show the satisfaction to both function targets and characteristics
在子電路設計中，本論文只對其中的誤差放大器、軟啟動電路、使能比較器和欠壓保護四個子電路進行了電路原理分析與設計，並在此基礎上，運用eda軟體hspice對各功能模塊的各項指標、參數進行了模擬、分析。In the meantime, the all sub - circuits are also designed and emulated carefully including inverter, rs type flip - flop, voltage reference circuit, error amplifier, voltage comparator, sawtooth - wave generator, pwm comparator, soft activation circuit and so on. as a result, all of the sub - circuits answer the requirements. this chip has taped out with the 0. 5um mix - signal process of csmc
本文利用cadenceeda集成電路設計工具、 spectres模擬工具，對集成電路內的各個模塊包括反相器、基本rs觸發器、基準電壓電路、誤差放大電路、電壓比較電路、鋸齒波振蕩發生電路、 pwm比較電路、軟啟動電路、驅動電路等進行了具體的設計和模擬，且達到了預先設定的指標。And the ways to optimize the circuit architecture, minimize the circuit nonidealities and improve the circuit performance are analyzed combined with the characteristics of the modulator architecture. based on it, the switched - capacitor integrator, class a amplifier, nonoverlap clock, voltage reference, comparator, feedback dac have been designed. in the end, the layout design is shown
調制器採用全差分開關電容電路實現，並根據系統結構特點就如何優化電路結構、克服電路中存在的非理想特性、提高電路性能作了具體分析，在此基礎上完成了開關電容積分器（開關、電容、運算放大器） 、參考電壓源、比較器、兩相非交疊時鐘、反饋dac等模塊的電路結構和參數設計。A novel error amplifier with initial voltage reference for series voltage regulator
串聯穩壓器基準誤差放大電路的設計In meantime, the all sub - circuits are also designed and emulated carefully including error amplifier, voltage reference circuit, voltage comparator, rs type flip - flop, soft - start circuit, sawtooth - wave generator, pwm comparator, current added circuit and so on
其次對控制器內部晶元的各個模塊誤差放大電器、自舉電流電路、電壓基準源、電流求和電路、 rs觸發器和驅動電路等模塊進行了具體的設計和模擬的邏輯功能做了解釋。And then, based on the above theories, the circuit design and simulation means have been concretely applied in the internal modules of voltage reference, bias circuit, oscillator, error amplifier and drive circuit of the chip and so on. the relevant design indexes are successfully achieved. at last, the whole circuit simulation and layout design are completed
在此理論基礎上對該電源晶元內部的各個模塊，如電壓基準源、偏置電路、振蕩器、誤差放大電路和驅動電路等模塊進行了具體的電路設計和分析模擬，且達到了相應地設計指標，最後，完成了整體電路模擬和版圖設計。分享友人