demodulation circuit 中文意思是什麼

demodulation circuit 解釋
解調電路
  • demodulation : n. 【無線電】解調，反調制；檢波。
  • circuit : n 1 （某一范圍的）周邊一圈；巡迴，周遊；巡迴路線[區域]；迂路。2 巡迴審判（區）；巡迴律師會。3 【...
  1. Amplitude modulation and demodulation circuit

    振幅復?調迴路
  2. Eddy - current sensor conversion circuit consist amplification circuit, band - pass filter circuit, demodulation circuit, differentiation phase and data sampling circuit. these circuits are used to convert the test signal of eddy - current sensor to discrete signal tend to process. the microprocessor system that formed of dsp chip is used to data fitting of test system, data displaying and data communicating with personal computer, etc. the interference questions of hardware design and the measure of eliminating interference signal in the subject are introduced in the last of this chapter

    硬體電路的設計主要分三大部分來實現：激勵源電路部分，由分頻電路和頻率合成電路組成，產生頻率穩定的激勵信號以確保檢測任務的正常進行；傳感器變換電路部分，由放大電路、濾波電路、檢波電路、鑒相電路和數據採集電路組成，主要將電渦流傳感器檢測線圈檢測到的信號變換成只含有被測信息的離散信號，易於后續電路處理；由dsp晶元構成的微處理系統，主要完成檢測系統的數據擬合、顯示及與主機通信等功能。
  3. The hardware is composed of the selection of sensor, magnifying circuit, filter circuit of multi - plot tracing, shaping circuit, demodulation circuit, peak value holding circuit, and voltage comparing circuit

    硬體部分包括傳感器的選擇、放大電路、多點跟蹤濾波電路、整形電路、檢波電路、峰值保持電路、電壓比較電路。
  4. This paper mainly focuses on the noise limiting by means of the direct sequence spread spectrum ( dsss ) and the analysis of the transmission performance of the plc and some digital modulation technology. the contents of the paper is as follows : 1 ) the technical feasibility is proved after simulating noise limiting principle of dsss by means of systemview, the simulation software ; 2 ) a kind of band pass filter ( bpf ) is realized according to the requirement of filter and the principle of butterworth approximation, which satisfies the index of performance of dsss. 3 ) the low voltage plc system includes the sc1128, the specific modulation / demodulation ic, the bpf filter and other circuit components, furthermore, the control function of system is realized by means of the personal computer and the microcontroller

    本課題在對低壓電力線的傳輸特性和數字調制技術進行分析的基礎上，將通信理論中的直接序列擴頻技術（ dsss ）用於解決低壓電力線通信的干擾問題，主要研究內容如下： （ 1 ）用通信模擬軟體systemview對dsss技術的通信和抗干擾原理進行模擬分析，分別對時域和頻域下採用dsss技術前後接收信號的頻譜進行分析，驗證dsss技術在本系統中的可行性； （ 2 ）由dsss技術對濾波系統的要求，根據濾波理論分析了巴特沃思型濾波器的逼近原理並設計了合適的濾波電路； （ 3 ）用調制解調晶元sc1128和自行設計的濾波器加之輔助外圍電路，構造出低壓電力線載波通信系統，並採用atmel公司的單片機設計了接收和發射電路的微控制器； （ 4 ）分別對採取抗干擾措施前後輸入和輸出信號進行對比實驗，並對結果進行分析，驗證了dsss技術對干擾信號的抑制作用。
  5. 3. with comprehensive improvement of transponder including structural adjustment to lna ; optimization of ( phase locked loop ) pll filter ; structural adjustment to the transmitter and phase error adjustment to the intermediate frequency demodulation circuit, we have successfully enhanced sensitivity, expanded dynamic range, increased transmitting power and improved the spectrum purity ; decreased capture time for pll ; improved the signal quality after demodulation ; reduced its volume and power consumption. 4

    3 、對通信機的全面改進，包括lna結構的調整、鎖相環環路濾波器的優化、發射部分結構的調整以及中頻解調電路的相差調整，提高了系統的接收靈敏度、改善了本振的頻譜純度、減少了鎖相環的鎖定時間、使中頻解調后的信號質量大為提高，同時還減少了體積、節約了系統的功耗。
  6. It is comprised of short message processor and tfaas application. the former is concerned on software for at89c51 and other hardware which include fsk demodulation circuit soft keyboard circuit and so on

    簡訊處理器由89c51軟體和相應硬體組成，包括fsk解調電路、軟鍵盤電路等。 89c51軟體主要完成簡訊接收和分析並將採集數據進行發送。
  7. The demodulation circuit interfaced with the local bus, demodulates the signals transmitted on the pstn and restores the acquired data. in order to work nomally, hardware needs cooperation with software. the driver for pci demodulator has been developed

    本地總線上掛接解調電路，對傳輸來的信號進行解調，恢復採集的數據。硬體需有軟體的配合才能正常的工作，因此為pci解調器設計了驅動程序。
  8. Critical circuits in developing this board, such as tht modulation circuit, demodulation circuit, pll and filter, were analyzed in detail. parameters adopted in these circuits were also calculated. based on all that mentioned above, a rf board was implemented and related tests and experiments were successfully done as well

    本文主要對cdpd移動終端數據機的硬體開發中的關鍵部分?高頻部分電路進行了研究，論文在cdpdv1 . 1規范的基礎上，提出了射頻部分電路的實現方案，選擇了合適的核心晶元，並對電路中的調制解調電路、鎖相環、濾波器等關鍵模塊進行了較為詳細的分析，對電路中的有關參數進行了計算。
  9. An adaptive demodulation circuit is also given to reduce the affection of the noise, the interference and the instability of the signal

    目前，採用自適應檢波電路的處理機己經在工業用避碰雷達中獲得應用。
  10. Firstly, the temperature varies in a large range in the place where the gap sensor works, so this paper analyzes the temperature drift of gap sensor, and finds out that the main reasons which result in temperature drift are the resistance of detecting coil and demodulating circuit parameters. to resolve this problem, a practical design of detecting coil is given, and a compensative measure considering the detecting coil and demodulation circuit is proposed to improve the temperature stability of gap sensor

    首先，針對間隙傳感器工作環境溫度變化較大的情況，本文對間隙傳感器溫度漂移現象進行了分析，認為檢測線圈電阻和檢波電路參數變化是造成傳感器溫漂的主要原因，建立了檢測線圈的數學模型，提出了檢測線圈和檢波電路綜合補償方法，解決了間隙傳感器的輸出信號溫度穩定性的問題。
  11. In order to solve the problem of weak fluorescence, the signal modulation circuit and signal demodulation program were designed

    針對熒光信號比較微弱的問題，本文設計了光纖倏逝波生物傳感器系統的信號調制電路和信號解調程序。
  12. The reason for the problem, which consists in some error of the old phase - demodulation circuit, is found out by computer simulation in this dissertation. then a new phase - demodulation circuit is designed and the problem settled

    本文通過對機抖陀螺進行計算機模擬，查明了問題產生的根源在於原有鑒相電路設計有誤，並設計了新的鑒相電路，從根本上解決了該問題。
  13. Thus the principle to deal with the four basic waveforms is put forward and a new phase - demodulation circuit is designed. experiments for the two circuits on same gyros are made and they indicate clearly that the mdrlg ' s null - shift problem consists in the faultiness of the old phase - demodulation circuit

    在此基礎上，提出了處理計數信號過鎖區波形的基本原則，進而設計了新的鑒相電路，並在同一陀螺上對兩鑒相電路進行了對比實驗。
  14. Firstly, computer model of mdrlg is set up for simulation purpose. by simulation about the two output signals of mdrlg, four basic waveforms between the two signals in lock - in area are found out and the fact is discovered that the old phase - demodulation circuit introduces errors when it is used for demodulating two of the four basic waveforms

    本文首先建立了機抖陀螺的計算機模擬模型，利用該模型對陀螺兩路計數信號及原有鑒相電路進行了模擬，發現兩路計數信號過鎖區時存在四種基本波形，且原有鑒相電路對其中兩種波形產生鑒相誤差。
  15. Secondly, basing on single channel if sr receiver mathematic model, this thesis has designed if sr receiver subsystem and brought forward its design project and system circuit principle diagram, and explained the system working principle. furthermore, this thesis introduces the working principles and respective applications of wideband high - speed adc ad6640, ddc ad6620 and high - speed dsp tms320c6713 according with the if sr receiver subsystem high - speed analog digital conversion department, digital down conversion department and high speed digital signal processing department. thirdly, the thesis emphatically demonstrates the software realization department of the if sr receiver subsystem, which including ad6620 ' s inner parameter software setup, tms320c6713 data transmission and processing and the quadrant demodulation algorithm program realization

    其次，基於單通道中頻軟體無線電接收機數學模型，本文設計了中頻（ if ， intermediatefrequency ）軟體無線電接收機子系統，給出了中頻軟體無線電接收機子系統的設計方案和系統電路原理圖，說明了系統工作原理，並分別對應系統中的高速模數轉換部分、數字下變頻部分、基帶數字碩士學位論文軟體無線電理論研究及中頻軟體無線電接收機子系統設計信號處理部分，介紹了高速adcad664o ，數字下變頻器（ ddc ， digitaldownconverter ） ad6620 ，高速數字信號處理器（ dsp ， digitalsignalproeessor ） tms320c6713的工作原理，以及它們在中頻軟體無線電接收機子系統中的應用。
  16. By using the operation circuit, the drive voltage of f - p in feedback can automatic trace the reflected fbg wavelength. not only had an extraordinary wide demodulation range of frequency achieved, but also a problem solved that when the sensing probe is changed, the sensor has the ability to automatic adjust the drive voltage of f - p to keep up with the dramatic change of the reflected fbg wavelength

    本文中創新性地提出了「自動跟蹤」的概念，利用光電系統中的運算電路，不僅能夠自動跟蹤調整法布里腔的驅動電壓、在保證精確度的同時有效地提高該傳感系統的解調頻率范圍，還有效地解決了在測量范圍內有時需要更換傳感探頭的重新調諧問題。
  17. The asic ( application specific integrated circuit ) is placed in core. it implements modulation / demodulation and docsis ( data - over - cable service interface specification ) protocol

    本文作者參與了重慶市的重點科研項目? cablemodem及其前端系統cmts的研製工作，主要從事的是cm的研究，可以說對cm相當熟悉。
  18. Finally, this paper brings forward to the betterment means for making sensor probe. the circuit of signal procession module are introduced. it expounds the important parts, for example, design of oscillatory, design of demodulation circuit, design of signal filter circuit

    介紹了研製的傳感器信號處理模塊電路，對電路中的重要部分如：高穩振蕩源的設計、檢波電路設計、濾波電路設計等都有詳細說明。
  19. The system include collecting and gathering part. power energy is collected and stored by outer circuit, modulation and demodulation is finished by spread spectrum integrated circuit. the whole system is controled by the window which is designe d by software visual basic

    該系統主要包括採集器和集中器，由外圍電路完成電量的採集和存儲，由擴頻晶元對信號進行調制和解調，通過電力線的傳輸，實現對電量的抄送，通過visualbasic設計的通信界面實現對系統的控制。
  20. The thesis deals with the algorithm of demodulation and its asic ( application specific integrated circuit ) implementation. the demodulation is used in the dvb receiver of digital video broadcasting satellite transmission system

    本文所研究的正是衛星電視廣播系統dvb標準接收機中數字解調的演算法及其在專用集成電路晶元（ asic ）上的實現。
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