The radio spectrum is one of the most precious resources which Must be managed to ensure efficient access for the wireless communication services which use it. The allocation and management of spectrum are administered by the regulatory authorities. Traditionally, spectrum allocation is carried out exclusively of its use in large geographic areas and assigning frequency bands to specific users or service providers is proved to be inefficient. Recently, substantial knowledge about dynamic spectrum access scheme has been accumulated to enable efficient spectrum sharing.
標簽： Management Spectrum Access and
上傳時間： 2020-06-01
上傳用戶：shancjb
The challenges associated with the design and implementation of Electro- static Discharge (ESD) protection circuits become increasingly complex as technology is scaled well into nano-metric regime. One Must understand the behavior of semiconductor devices under very high current densities, high temperature transients in order to surmount the nano-meter ESD challenge. As a consequence, the quest for suitable ESD solution in a given technology Must start from the device level. Traditional approaches of ESD design may not be adequate as the ESD damages occur at successively lower voltages in nano-metric dimensions.
標簽： Protection Circuit Device Design ESD and
上傳時間： 2020-06-05
上傳用戶：shancjb
As we enter the next millennium, there are clear technological patterns. First, the electronic industry continues to scale microelectronic structures to achieve faster devices, new devices, or more per unit area. Secondly, electrostatic charge, electrostatic discharge (ESD), electrical overstress (EOS) and electromagnetic emissions (EMI) continue to be a threat to these scaled structures. This dichotomy presents a dilemma for the scaling of semiconductor technologies and a future threat to new technologies. Technological advancements, material changes, design techniques, and simulation can fend off this growing concern – but to maintain this ever-threatening challenge, one Must continue to establish research and education in this issue.
標簽： ESD-Phenomena-and-the-Reliability
上傳時間： 2020-06-05
上傳用戶：shancjb
Electricity has been chosen as the most convenient and useful form of energy, due to its ease of transportation over large distances and easy conversion to other energy forms. The biggest inconvenience with electricity is that it cannot be stored and Must be utilized at the moment of generation. The storage of a large amount of electrical energy is usually connected with its conversion to other types of energy, which significantly reduces the efficiency of such processes. The aim of the power system, often treated as the biggest and the most complex machine ever built, is to deliver uninterruptible electric energy of demanded quality parameters to consumers.
標簽： Electromagnetic Interference Conducted
上傳時間： 2020-06-07
上傳用戶：shancjb
RFID is at a critical price point that could enable its large-scale adoption. What strengths are pushing it forward? What technical challenges and privacy concerns Must we still address?
標簽： an-introduction-to-rfid-technolog
上傳時間： 2020-06-08
上傳用戶：shancjb
Simulation is experimentation with models. For system design, research, and edu- cation, simulations Must not only construct and modify many different models but also store and access a large volume of results. That is practical only with models programmed on computers [1,2]
上傳時間： 2020-06-10
上傳用戶：shancjb
Machine learning is a broad and fascinating field. Even today, machine learning technology runs a substantial part of your life, often without you knowing it. Any plausible approach to artifi- cial intelligence Must involve learning, at some level, if for no other reason than it’s hard to call a system intelligent if it cannot learn. Machine learning is also fascinating in its own right for the philo- sophical questions it raises about what it means to learn and succeed at tasks.
標簽： Learning Machine Course in
上傳時間： 2020-06-10
上傳用戶：shancjb
Agilent 34401A Service Guide.pdfIEC Measurement Category II includes electrical devices connected to mains at an outlet on a branch circuit. Such devices include most small appliances, test equipment, and other devices that plug into a branch outlet or socket. The 34401A may be used to make measurements with the HI and LO inputs connected to mains in such devices, or to the branch outlet itself (up to 300 VAC). However, the 34401A may not be used with its HI and LO inputs connected to mains in permanently installed electrical devices such as the main circuit-breaker panel, sub-panel disconnect boxes, or permanently wired motors. Such devices and circuits are subject to overvoltages that may exceed the protection limits of the 34401A. Note: Voltages above 300 VAC may be measured only in circuits that are isolated from mains. However, transient overvoltages are also present on circuits that are isolated from mains. The Agilent 34401A are designed to safely withstand occasional transient overvoltages up to 2500 Vpk. Do not use this equipment to measure circuits where transient overvoltages could exceed this level. Additional Notices Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC This product complies with the WEEE Directive (2002/96/EC) marking requirement. The affixed product label (see below) indicates that you Must not discard this electrical/electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE directive Annex 1, this product is classified as a "Monitoring and Control instrumentation" product. Do not dispose in domestic household waste. To return unwanted products, contact your local Agilent office, or see www.agilent.com/environment/product for more information. Agilent 34138A Test Lead Set The Agilent 34401A is compatible with the Agilent 34138A Test Lead Set described below. Test Lead Ratings Test Leads - 1000V, 15A Fine Tip Probe Attachments - 300V, 3A Mini Grabber Attachment - 300V, 3A SMT Grabber Attachments - 300V, 3A Operation The Fine Tip, Mini Grabber, and SMT Grabber attachments plug onto the probe end of the Test Leads. Maintenance If any portion of the Test Lead Set is worn or damaged, do not use. Replace with a new Agilent 3413
標簽： agilent
上傳時間： 2022-02-20
上傳用戶：
ABB機器人編程手冊.pdfAliasIO is used to define a signal of any type with an alias name or to use signals in builtin task modules. Signals with alias names can be used for predefined generic programs, without any modification of the program before running in different robot installations. The instruction AliasIO Must be run before any use of the actual signal. See Basic examples on page 21 for loaded modules, and More examples on page 22 for installed modules.
上傳時間： 2022-03-28
上傳用戶：kingwide
為了提高超高頻RFID系統(tǒng)中閱讀器在低信噪比的情況下仍具有較高的識別能力,提出一種基于FPGA系統(tǒng)結(jié)合軟件無線電方法實現(xiàn)超高頻RFID射頻前端電路方案。超高頻射頻識別系統(tǒng)必須符合EPC Class 1generation 2標準,所設(shè)計的電路系統(tǒng)以Xilinx公司的XC6SLX16-2CSG324FPGA芯片為硬件基礎(chǔ),將數(shù)字基帶調(diào)制解調(diào)和中頻濾波電路在FPGA系統(tǒng)中設(shè)計實現(xiàn),重點闡述了射頻前端電路的設(shè)計結(jié)構(gòu)、AD/DA轉(zhuǎn)換電路,以及數(shù)字濾波器的設(shè)計。實驗結(jié)果表明,所設(shè)計的超高頻RFID閱讀器簡化了前端電路系統(tǒng)結(jié)構(gòu),提升了穩(wěn)定性,增強了抗干擾能力。該電路系統(tǒng)在信噪比較低的情況下,能夠較好地實現(xiàn)915MHz頻率的射頻接收和發(fā)送。In order to improve the reader UHF RFID system still has a higher ability to identify,in the case of low signal-to-noise ratio.The UHF RFID systems Must comply with EPC Class 1 generation 2 standard.In this paper,the design of the circuit system based on Xilinx＇s XC6SLX16-2CSG324 FPGA chip,and presents UHF RFID RF front-end circuit with software radio based on FPGA system.Digital baseband modem and IF filter circuit is designed and implemented in the FPGA system,and focused on designing the structure of the RF front-end circuit,AD/DA conversion circuits,and digital filter.Experimental results show that the UHF RFID reader de...
標簽： 915mhz 超高頻 rfid 閱讀 射頻 前端 電路 設(shè)計
上傳時間： 2022-04-17
上傳用戶：shjgzh
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