- US Navy - Electronics Technician - 9 - Electro-Optics
標(biāo)簽： Electro-Optics Electronics Technician Navy
上傳時(shí)間： 2013-12-23
上傳用戶：shizhanincc
OPTOElectroNICS CIRCUIT COLLECTION AVALANCHE PHOTODIODE BIAS SUPPLY 1Provides an output voltage of 0V to +80V for reverse biasingan avalanche photodiode to control its gain. This circuit canalso be reconfigured to supply a 0V to –80V output.LINEAR TEC DRIVER–1This is a bridge-tied load (BTL) linear amplifier for drivinga thermoelectric cooler (TEC). It operates on a single +5Vsupply and can drive ±2A into a common TEC.LINEAR TEC DRIVER–2This is very similar to DRIVER–1 but its power output stagewas modified to operate from a single +3.3V supply in orderto increase its efficiency. Driving this amplifier from astandard +2.5V referenced signal causes the output transistorsto have unequal power dissipation.LINEAR TEC DRIVER–3This BTL TEC driver power output stage achieves very highefficiency by swinging very close to its supply rails, ±2.5V.This driver can also drive ±2A into a common TEC. Operationis shown with the power output stage operating on±1.5V supplies. Under these conditions, this linear amplifiercan achieve very high efficiency. Application ReportThe following collection of analog circuits may be useful in Electro-optics applications such as optical networkingsystems. This page summarizes their salient characteristics.
標(biāo)簽： 光電轉(zhuǎn)換 電路設(shè)計(jì)
上傳時(shí)間： 2013-10-27
上傳用戶：落花無(wú)痕
機(jī)電類比法是一種把機(jī)械量通過(guò)一定的計(jì)算等效類比為電量的方法，其在對(duì)電子機(jī)械系統(tǒng)的分析中應(yīng)用非常廣泛。它能夠把一個(gè)較復(fù)雜的機(jī)械系統(tǒng)類比為我們熟知的電路系統(tǒng)來(lái)進(jìn)行分析，從而使問(wèn)題的分析得到簡(jiǎn)化。本文通過(guò)對(duì)振弦式傳感器的分析介紹了機(jī)電類比法，并對(duì)使用電路進(jìn)行了相關(guān)的分析。 Summary：The Electromechanical analogy is assort of analysis which is to analogize the mechanical system by using circuit system , it applied widely in the filed of analysis the Electronic-mechanical system. The analysis can take a complex mechanical system analogous to a circuitry that we well-known, which can simplify the problems. In the paper, the Electro-mechanical analogy method is briefly introduced by analysis the vibrating wire sensor，and have a correlation analysis about the circuit we used.關(guān)鍵詞： 機(jī)電類比法 振弦式傳感器 頻率 振蕩 反饋Keyword：Electro-mechanical analogy method，vibrating wire sensor，frequency, oscillation, feedback 0 引言振弦式傳感器是屬于頻率式傳感器的一種。所謂頻率式傳感器就是能直接將被測(cè)量轉(zhuǎn)換為振動(dòng)頻率信號(hào)的傳感器，這類傳感器一般是通過(guò)測(cè)量振弦、振筒、振梁、振膜等彈性振體或石英晶體諧振器的固有諧振頻率來(lái)達(dá)到測(cè)量引起諧振頻率變化的被測(cè)非電量的目的，其也稱為諧振式傳感器[1]。在分析該類傳感器中，由于其涉及到頻率，就容易讓人聯(lián)想到在電子技術(shù)中接觸到的RLC振蕩電路。因此可以嘗試著用類比的方法使之對(duì)應(yīng)起來(lái)分析,即機(jī)電類比法分析。
上傳時(shí)間： 2013-11-16
上傳用戶：paladin
對(duì)微機(jī)電系統(tǒng)(Micro Electro mechanical systems，MEMS)組裝與封裝工藝的特點(diǎn)進(jìn)行了總結(jié)分析，給出了MEMS組裝與封裝設(shè)備的研究現(xiàn)狀。針對(duì)MEMS產(chǎn)業(yè)發(fā)展的特點(diǎn)，分析了面向MEMS組裝與封裝的微操作設(shè)備中的工藝參數(shù)優(yōu)化數(shù)據(jù)庫(kù)、快速精密定位、模塊化作業(yè)工具、快速顯微視覺(jué)、柔性裝夾和自動(dòng)化物流等關(guān)鍵技術(shù)。在此基礎(chǔ)上，詳細(xì)介紹了研制的MEMS傳感器陽(yáng)極化鍵合設(shè)備和引線鍵合設(shè)備的組成結(jié)構(gòu)，工作原理，并給出了組裝和封裝試驗(yàn)結(jié)果。最后，指出了MEMS組裝與封裝技術(shù)及設(shè)備研制的發(fā)展趨勢(shì)。
標(biāo)簽： 微機(jī)電系統(tǒng) 封裝 關(guān)鍵技術(shù) 操作
上傳時(shí)間： 2016-07-26
上傳用戶：leishenzhichui
Free Space Optical Communication (FSOC) is an effective alternative technology to meet the Next Generation Network (NGN) demands as well as highly secured (mili- tary) communications. FSOC includes various advantages like last mile access, easy installation, free of Electro Magnetic Interference (EMI)/Electro Magnetic Compatibil- ity (EMC) and license free access etc. In FSOC, the optical beam propagation in the turbulentatmosphereisseverelyaffectedbyvariousfactorssuspendedinthechannel, geographicallocationoftheinstallationsite,terraintypeandmeteorologicalchanges. Therefore a rigorous experimental study over a longer period becomes significant to analyze the quality and reliability of the FSOC channel and the maximum data rate that the system can operate since data transmission is completely season dependent.
標(biāo)簽： Communication Optical System Space Free
上傳時(shí)間： 2020-05-27
上傳用戶：shancjb
Static electricity is the most ancient form of electricity known to humans. More than 2000 years ago, the Greeks recognized the attraction between certain mate- rials when they were rubbed together; indeed, the word electricity comes from the Greek elektron, which means amber. During the seventeenth and eighteenth centuries, several key experiments were conducted to understand and measure static electricity. But the discovery of Electromagnetism and its formidable break- through has rapidly outgrown interest in static electricity. Even today, where the industrial applications of static electricity are not insignificant, they cannot compare with those of Electromagnetism and Electrodynamics.
標(biāo)簽： Understand Discharge Electro Static
上傳時(shí)間： 2020-06-05
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(biāo)簽： Protection Circuit Device Design ESD and
上傳時(shí)間： 2020-06-05
上傳用戶：shancjb
For more than three decades, Micro Electro Mechanical Systems (MEMS) have steadily transitioned out of research labs and into production forming a more than $10 billion market [1]. MEMS devices such as accelerometers, pressure sensors and microphones, to name a few, have seen immense utilization, particularly in the consumer Electronics market, because of their compact sizes and minute power consumptions. In addition, these devices benefit from batch fabrication, which has enabled year-over-year reductions in cost [2]. In recent years,
標(biāo)簽： Frequency Tunable MEMS
上傳時(shí)間： 2020-06-06
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(biāo)簽： Performance High MEMS RF
上傳時(shí)間： 2020-06-06
上傳用戶：shancjb
臺(tái)達(dá)的資料，給用的著的同學(xué)們。早期當(dāng)各家 PLC 開發(fā)商紛紛建立自己的編程語(yǔ)言時(shí)，其各自不同的編程方式，對(duì)于用戶而言無(wú)疑是一個(gè)相當(dāng)大的負(fù)擔(dān)；有鑒于此，由國(guó)際組織 I.E.C.（International Electro-technical Commission）所制定與推動(dòng)的 IEC 61131-3 標(biāo)準(zhǔn)便由此應(yīng)運(yùn)而生。其主要的特色在于統(tǒng)整各家的編程特點(diǎn)，并考慮用戶的背景與習(xí)慣，而規(guī)范了一個(gè)可讓各家廠商與用戶共同依循的標(biāo)準(zhǔn)，并可讓符合 IEC61131-3 標(biāo)準(zhǔn)的程序代碼具備相當(dāng)高的可讀性與兼容性。以下是關(guān)于 IEC 61131-3 的簡(jiǎn)述。
標(biāo)簽： plc
上傳時(shí)間： 2022-02-21
上傳用戶：
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