range amplifier 中文意思是什麼
range amplifier
解釋
測距放大器-
In the blue print of the analog, author utilize the big dynamic vga to realize the if amplifier and use the audion to carry out the 80db agc, through the improvement of the traditional detect circuit, extend the dynamic range of the detector
在模擬方案中，筆者採用了大動態的vga實現中頻放大;利用三極體檢波實現了80db的agc控制;通過對傳統二極體檢波電路改進，提高了檢波器的動態范圍。 -
It integrates the functions of servo amplifier, dynamic operator, position transmitter and remote communication. many new functions have added to its original ones, such as the real - time logical judgment, malfunctions self - diagnosis, alarm & protection, led display, on - line setting and adjustment of functional parameter and position transmitter, power - absence data auto - protection, watchdog system protection, and the long - range communication with pc
系統集伺服放大器、電動操作器、位置發送器及遠程網路式通信功能於一體，在保留對應部分原有功能的同時，還新增了邏輯實時判斷、故障實時監控、 led動態顯示數據、功能參數設置、掉電數據自保護、 「看門狗」電路保護、位置發送器在線調節、與遠程工控機數據通信等眾多功能。 -
In wavelength conversion based on four - wave mixing ( fwm ) in soa, balance efficiency can be obtained in larger range when increasing saturation power of the optical amplifier and decreasing the saturation power of spectral hole burning and carrier heating
而在基於soa的四波混頻（ fwm ）波長轉換中，在提高光放大器飽和功率的同時減小光譜燒孔（ shb ）和載流子加熱（ ch ）飽和功率可有效提高較大頻率間隔處的轉換效率，並保持其在較大頻率失諧范圍內的效率均衡。 -
Wide range weak current integrated amplifier
寬量程微電流測量系統 -
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） 。 -
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。 -
The first part of the paper is designing the testing project for grounding resistance and insulation resistance in a new way. using 16bits ad converter with programmable control amplifier replaced the way which used changing resistance to change measure range. lt is not only improved testing precision and develop the system expediently, but also reduced the area of the circuit boardwith the new way. in order to make the electric implement safety testing system have upstanding expansibility, the software and hardware of the system adopted the modularization design. adopted mcu atmegal28 as a master mcu which control mmi, realtime clock and communication with slaver mcu. atemga8 as the slaver mcu to realize testing function. so it is easy to add or reduce the testing project. the testing implement system has been developed successfully, and the comments for the system is that it has high precision, high expansibility and easy maintain. but considering the electric implement system should have intelligence and humanity abi lity. so this paper bring forward a scheme of electric equipment safety testing embedded system with speech control. after introduce the basic theory of speech recognition, the paper expatiate the characters of this system. the system is a noise conditon, not special people, small glossary, insulation word system. with these characters design the speech recognition as fellow. utilizing cross zero ratio and short energy to ensure jumping - off point and end point ; adopting mfcc as the character parameters of speech recognition ; the character parameters than be recognized by dtw. in order to ensure the credibility of this project, first realized by matlab in computer
在介紹了語音識別的基本原理后，闡述了本系統的特點：本系統是一個噪聲環境下非特定人、小詞匯量、孤立詞的語音識別系統。根據本系統的這些特點設計了如下語音識別方案：利用過零率和短時能量相結合的方式確定語音端點；採用mel頻率倒譜系數（ mfcc ）作為語音識別的特徵參數；得到的特徵參數最後通過動態時間規整（ dtw ）的模式識別方法進行識別。為了確保本系統實現方案的可靠性，首先通過計算機利用matlab軟體來模擬，在演算法模擬實現后又進一步增加環境的復雜性：加上較大的環境噪聲、突發性的噪聲等，再通過修改參數、修改參考模板、兩級識別等各種提高語音識別精度的方法來提廣東工業大學工學碩士學位論文高識別率。 -
4. according to the analyses of underwater acoustic channel and long - range remote control receiving system, we designed the long - range remote control receiver, including a low noise prefix - amplifier, a band pass filter and an auto - gain control circuit. finally, the analog part of the receiver is tested and the frequency response of this receiving system is obtained.
結合對水聲通道特性和遠程遙控接收系統的分析，進行了遠程遙控接收機的設計，包括接收機低噪聲前置放大器的設計、帶通濾波器電路的設計和集成以及自動增益控制電路的設計，最後對接收機模擬電路進行了調試。 -
The precision amplifier and sixteen bit analog / digital ( a / d ) convertor ad7677 are used in designing data collection module which can convert range automatically
選用高性能運算放大器及16位模數轉換器ad7677完成了帶有自動量程轉換的數據採集模塊的設計。 -
Linear dynamic range of amplifier
放大器線性動態范圍 -
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。 -
The linear amplifier on the spectrometer, besides it has the enough enlargement factor, and needs the good linearity and the broad dynamic range
能譜儀上用的線性放大器，除了有足夠的放大倍數外，還須有良好的線性和寬廣的動態范圍。 -
In the blue print of the digital, make sure of the logarithmic amplifier, a / d / a converter and fpga realize the if amplifier, big dynamic range agc, detect and video process same as that in the blue print of the analog
在數字方案中，筆者結合軟體無線電技術，通過使用對數放大檢波器、 a / d / a轉換器以及fpga軟體實現了同樣的中頻放大、大動態范圍的agc控制、以及檢波、視頻信號處理等功能。 -
We also magnify the signal with new ic amplifier, deduct yawp counters, design system to desl with data, total system is control by singlechip and can count in fastness time range and deal with data
用max4416放大器件作為前置放大器，用max900系列比較器件作成窗口比較器，用高速器件74ls393兩片作成16位的計數器，用單片機89c51讀取數據，並處理后顯示在液晶顯示模塊上。 -
The purpose is to compress the dynamic range of input signal from 40db to 5db. microwave limiting amplifier is widely used in electronic detecting and interfering radar system. so design a high performance limiting amplifier is a very important research direction
限幅放大器把很寬動態范圍內的微波輸入信號放大並壓縮為很小動態范圍的微波輸出信號，減小輸入信號大動態范圍內的波動對輸出信號處理的影響。 -
For long - haul high bit rate trunk line optical fiber communication system and metro optical fiber network, a semiconductor optical amplifier ( soa ) is the most promising component due to its all kinds of properties and small dimension, compactiveness, low drive voltage, such as in optical network solutions, polarization - insensitive semiconductor optical amplifier ( pisoa ) is a popular candidate as optical gates. but the polarization - insensitivity over large wavelength range is requested. the purpose of this thesis is to develop a soa which is polarization - insensitive and has large 3db bandwidth
隨著寬帶傳輸和寬帶接入以及全光網的組建和發展，大帶寬偏振不靈敏半導體光放大器（ semiconductoropticalamplifier ， soa ）由於其易於與其它器件集成，體積小，具有快的動態增益響應，非線性好，飽和輸出大，可實現無損操作等特點，在光通信網路中，成為光纖通信發展，全光網組建以及wdm 、 tdm技術成熟的關鍵部件之一，其中偏振不靈敏和大的3db帶寬是性能優良soa的重要指標，也是制備的技術難點。 -
We design, develop, manufacture and market a broad range of. st company provides series of semiconductors, such as amplifier, comparator, voltage adjuster, and logical function such as nand and inverter, .
St公司提供的一系列器件，如運放比較器電壓調節器和邏輯功能如and門以及倒相器，滿足了各類應用領域的性能標準。 -
In electronics, pertaining to an amplifier or circuit having a frequency respo nse characteristics that is uniform, within defined limits, across a given frequency range
在電子學中，用來修飾或說明一種放大器或電路，這種放大器或電路在一個給定的頻率范圍內，具有均勻的頻率響應特性。 -
Simulation comparisons verify the superior performance of the tri - state pwm technology. experimental results indicate that the current - controlled tri - state pwm switching power amplifier based on sample - hold strategy has high frequency bandwidth and fast dynamic response in a wide load range, which can well meet the demands of high - speed magnetic bearing
模擬結果驗證了電流三態調制技術的優越性能；實驗表明本文研製的基於采樣-保持策略電流三態調制開關功放具有結構簡單、效率高、紋波小、電流動態響應快、頻帶寬、受負載影響小等優點，能很好地滿足高速磁軸承的要求。 -
In this dissertation, a boa - type waveguide optic switch with double - heterostructure gaas / gaalas has been researched. gaas - based integrated optical devices have good temperature, good anti - radiation and optical - transmission characteristics, and also have wide transparent range of wavelength. they can also be integrated on a chip with optical active devices and electronic devices, such as semiconductor laser, optical modulation, optical amplifier, pin, and so on
基於gaas材料的集成光學器件不僅具有良好的光傳輸特性、溫度特性、抗輻射能力和其較寬的透明波長范圍，還有望進一步實現晶元與光源、光調制器、光探測器和半導體光放大器等其它光電器件以及集成電路的單片集成；採用gaas gaalas雙異質結材料製作的光開關可以得到較低的開關電壓，而且採用gaas gaalas異質結材料的光傳輸損耗很小。
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