Today wireless is becoming the leader in communication choices among users. It is not anymore a backup solution for nomadic travellers but really a newmoodnaturallyusedeverywhereevenwhenthewiredcommunicationsare possible. Many technologies evolve then continuously, changing the telecom- munication world. We talk about wireless local area networks (WLANs), wire- less personal area networks (WPANs), wireless metropolitan area networks (WMANs), wireless wide area networks (WWANs), mobile ad hoc networks (MANETs), wireless sensor networks (WSNs) and mesh networks. Since we can find today a multitude of wireless technologies we decided to group a numberofcomplementarytechnologiesintoonedocumenttomakeiteasierfor areadertounderstandsomeofthetechnicaldetailsofeachmedia.
標簽： TM Bluetooth Zigbee Wi-Fi WiMax and
上傳時間： 2020-06-01
上傳用戶：shancjb
This paper reviews key factors to practical ESD protection design for RF and analog/mixed-signal (AMS) ICs, including general challenges emerging, ESD-RFIC interactions, RF ESD design optimization and prediction, RF ESD design characterization, ESD-RFIC co-design technique, etc. Practical design examples are discussed. It means to provide a systematic and practical design flow for whole-chip ESD protection design optimization and prediction for RF/AMS ICs to ensure 1 st Si design success.
標簽： ESD_protection_for_RF_and_AMS_ICs
上傳時間： 2020-06-05
上傳用戶：shancjb
Micro-Electro-Mechanical Systems (MEMS) are miniature systems composed ofintegratedelectricalandmechanicalpartstosenseand/orcontrolthingsonaμmscale. The concept of MEMS is attributed to Richard Feynman’s famous talk on December 29th, 1959 [2,3]. Dr. Feynman foresaw many aspects of future MEMS development with his insight in microphysics. In particular, material properties in the μm scale are differentfrombulkpropertiesandthescalingdownofintegratedcircuits(IC)fabrication technology has been a major driving force of MEMS development.
標簽： Performance High MEMS RF
上傳時間： 2020-06-06
上傳用戶：shancjb
Over many years, RF-MEMS have been a hot topic in research at the technology and device level. In particular, various kinds of mechanical Si-MEMS resonators and piezoelectric BAW (bulk acoustic wave) resonators have been developed. The BAW technology has made its way to commercial products for passive RF filters, in particular for duplexers in RF transceiver front ends for cellular communica- tions. Beyond their use in filters, micromachined resonators can also be used in conjunction with active devices in innovative circuits and architectures.
標簽： MEMS-based Circuits Systems and
上傳時間： 2020-06-06
上傳用戶：shancjb
GaN is an already well implanted semiconductor technology, widely diffused in the LED optoelectronics industry. For about 10 years, GaN devices have also been developed for RF wireless applications where they can replace Silicon transistors in some selected systems. That incursion in the RF field has open the door to the power switching capability in the lower frequency range and thus to the power electronic applications. Compared to Silicon, GaN exhibits largely better figures for most of the key specifications: Electric field, energy gap, electron mobility and melting point. Intrinsically, GaN could offer better performance than Silicon in terms of: breakdown voltage, switching frequency and Overall systems efficiency.
標簽： GaN-on-Si Displace and SiC Si
上傳時間： 2020-06-07
上傳用戶：shancjb
To a quantum mechanic the whole universe is one godawful big interacting wavefunction ? but to the rest of us, it’s a world full of separate and distinguishable objects that hurt us when we kick them. At a few months of age, human children recognize objects, expect them to be permanent and move continuously, and display surprise when they aren’t or don’t. We associate visual, tactile, and in some cases audible and olfactory sensations with identifiable physical things. We’re hardwired to understand our environment as being composed of separable things with specific properties and locations. We understand the world in terms of what was where when.
上傳時間： 2020-06-08
上傳用戶：shancjb
I wrote this book so that students, hobbyists, and engineers alike can take advantage of the Arduino platform by creating several projects that will teach them about the engineering process. I also wanted to guide the reader through introductory projects so that they could get a firm grasp on the Arduino Language, and how to incorporate several pieces of hardware to make their own projects. This book offers so much information on the Arduino, not just the basic LED projects but it offers different peripherals such as Ultrasonic sensor, the Xbox? controller, Bluetooth, and much more. This book also teaches the non-engineer to follow a process that will help them in future project (not just Arduino projects).
標簽： Engineering Practical Arduino
上傳時間： 2020-06-09
上傳用戶：shancjb
畢業論文-基于Arduino的溫度測試系統設計摘要在物質文化水平逐漸提高的社會背景下，智能家居逐漸興起，現如今已經具有一定的規模。基于arduino的數據采集端以及基于Android的數據接收終端是本文的研究對象，全文設計了智能家居的一個子系統——溫度測試系統。該基于arduino的溫度測試系統主要涉及了以下幾個領域：Android 平臺的軟件開發、Arduino 平臺的軟硬件構成、藍牙通信的簡單應用、溫度數據采集實際操作。該系統主要由Arduino UNO主控板、Arduino Xbee V5 傳感器擴展板、DS18B20 數字溫度傳感器、Bluetooth V3藍牙通信模塊、Android終端機構成。以藍牙作為媒介，通過Arduino組件和 Android組件的連接，完成了從傳感器收集數據傳輸到終端機的過程。本課題設計溫度測試系統，操作簡單，界面簡潔，測試結果觀測很直接，整個系統運行穩定流暢。本溫度測試系統也可用于其他很多行業，應用范圍很廣泛，非常值得進一步開發與升級。關鍵詞 智能家居；Arduino；Android；溫度測試
上傳時間： 2021-10-16
上傳用戶：jason_vip1
使用片式磁珠和片式電感的原因：是使用片式磁珠還是片式電感主;要還在于應用。在諧振電路中需要使用片式電感。而需要消除不需要的EMI噪聲時，使用片式磁珠是最佳的選擇。 磁珠是用來吸收超高頻信號，象-一些RF電路，PLL，振蕩電路，含超高頻存儲器電路（DDRSDRAM，RAMBUS等）都需要在電源輸入部分加磁珠。而電感是一種蓄能元件，用在LC振蕩電路，中低頻的濾波電路等，其應用頻率范圍很少超過錯50MHZ。 磁珠專用于抑制信號線、電源線上的高頻噪聲和尖峰干擾，還具有吸收靜電脈沖的能力。磁珠的功能主要是消除存在于傳輸線結構（PCB電路）中的RF噪聲，RF能量是疊加在直流傳輸電平上的交流正弦波成分，直流成分是需要的有用信號，而射頻RF能量卻是無用的電磁干擾沿著線路傳輸和輻射（EMI）。要消除這些不需要的信號能量，使用片式磁珠扮演高頻電阻的角色（衰減器），該器件允許直流信號通過，而濾除交流信號。通常高頻信號為30MHz以上，然而，低頻信號也會受到片式磁珠的影響
標簽： pcb
上傳時間： 2021-11-06
上傳用戶：xsr1983
Bluetooth Qualification Program Reference Document（PRD）是Bluetooth Qualification Program的主要參考文件，定義了其要求、功能和策略。藍牙網站上提供PRD。通過藍牙認證過程證明了一種措施因為產品沒有經過測試本藍牙規范的每一個方面，都不能保證合格順從。通過藍牙認證過程只滿足一個條件許可證授予的條件。成員的最終責任是確保合格產品符合此藍牙規范，并與其他產品互操作。
標簽： 藍牙協議棧
上傳時間： 2021-11-16
上傳用戶：ttalli
