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surface

surface是美國(guó)微軟公司推出的全新硬件品牌，微軟公司于2012年6月19日發(fā)布了surface系列平板電腦。這款平板電腦采用鎂合金機(jī)身10.6英寸顯示屏，配備USB2.0或3.0接口，使用Windows8操作系統(tǒng)。微軟官網(wǎng)將其稱為“全高清顯示屏”，屏幕比例為16:9。這款產(chǎn)品分為兩個(gè)版本：一個(gè)使用Windows8專為ARM設(shè)計(jì)的版本W(wǎng)indowsRT；另一個(gè)使用英特爾Corei5IvyBridge處理器，使用Windows8Pro。2012年10月26日，中國(guó)市場(chǎng)由蘇寧全球同步首發(fā)微軟surface。

SCATTERING, RADIATION AND PROPAGATION OVER TWO-DIMENSIONAL RANDOM surface,小倉(cāng)老師關(guān)于隨機(jī)泛函博散射的專著

SCATTERING, RADIATION AND PROPAGATION OVER TWO-DIMENSIONAL RANDOM surface,小倉(cāng)老師關(guān)于隨機(jī)泛函博散射的專著，除在日本京都大學(xué)作為教科書資料外，此文章作為一個(gè)章節(jié)撰寫在1996年的PIER(電磁研究進(jìn)展)14的第三章。

標(biāo)簽： TWO-DIMENSIONAL PROPAGATION SCATTERING RADIATION

上傳時(shí)間： 2013-12-20

上傳用戶：pompey
是英文 “ surface mount technology ”的縮寫。即表面安裝技術(shù)

是英文 “ surface mount technology ”的縮寫。即表面安裝技術(shù)，這是一種較傳統(tǒng)的安裝方式。其優(yōu)點(diǎn)是可靠性高，缺點(diǎn)是體積大，成本高，限制 LCM 的小型化。是英文 “ Chip On Board ”的縮寫。即芯片被邦定(Bonding)在PCB上，由于IC制造商在LCD控制及相關(guān)芯片的生產(chǎn)上正在減小QFP（ SMT 的一種）封裝的產(chǎn)量，因此，在今后的產(chǎn)品中傳統(tǒng)的 SMT 方式將被逐步取代。

標(biāo)簽： technology surface mount 英文

上傳時(shí)間： 2016-10-08

上傳用戶：nairui21
In this program we calculate the scattering field of a infinite rectangular surface. I use Physical

In this program we calculate the scattering field of a infinite rectangular surface. I use Physical Optic method and compare the result with exact solution.

標(biāo)簽： rectangular scattering calculate Physical

上傳時(shí)間： 2014-01-19

上傳用戶：362279997
Bezier surface in c. Without compiler. This is very good - I think.

Bezier surface in c. Without compiler. This is very good - I think.

標(biāo)簽： c. compiler surface Without

上傳時(shí)間： 2017-09-08

上傳用戶：litianchu
VGA 8:1 multiplexer reference

This reference design (RD) features a fullyassembled and tested surface-mount printed circuitboard (PCB). The RD board utilizes the MAX48851:2 or 2:1 multiplexer and other ICs to implement acomplete video graphics array (VGA) 8:1multiplexer.VGA input/output connections are provided to easilyinterface the MAX4885 RD board with VGAcompatibledevices. The RD board gives the optionto use a single 5V DC power supply (V+), or this RDboard can be powered from any one of the eight VGA sources.

標(biāo)簽： multiplexer reference VGA

上傳時(shí)間： 2013-11-09

上傳用戶：ANRAN
多層印制板設(shè)計(jì)基本要領(lǐng)

【摘要】本文結(jié)合作者多年的印制板設(shè)計(jì)經(jīng)驗(yàn)，著重印制板的電氣性能，從印制板穩(wěn)定性、可靠性方面，來(lái)討論多層印制板設(shè)計(jì)的基本要求。【關(guān)鍵詞】印制電路板；表面貼裝器件；高密度互連；通孔【Key words】Printed Circuit Board；surface Mounting Device；High Density Interface；Via一．概述印制板（PCB－Printed Circuit Board）也叫印制電路板、印刷電路板。多層印制板，就是指兩層以上的印制板，它是由幾層絕緣基板上的連接導(dǎo)線和裝配焊接電子元件用的焊盤組成，既具有導(dǎo)通各層線路，又具有相互間絕緣的作用。隨著SMT（表面安裝技術(shù)）的不斷發(fā)展，以及新一代SMD（表面安裝器件）的不斷推出，如QFP、QFN、CSP、BGA（特別是MBGA），使電子產(chǎn)品更加智能化、小型化，因而推動(dòng)了PCB工業(yè)技術(shù)的重大改革和進(jìn)步。自1991年IBM公司首先成功開(kāi)發(fā)出高密度多層板（SLC）以來(lái)，各國(guó)各大集團(tuán)也相繼開(kāi)發(fā)出各種各樣的高密度互連（HDI）微孔板。這些加工技術(shù)的迅猛發(fā)展，促使了PCB的設(shè)計(jì)已逐漸向多層、高密度布線的方向發(fā)展。多層印制板以其設(shè)計(jì)靈活、穩(wěn)定可靠的電氣性能和優(yōu)越的經(jīng)濟(jì)性能，現(xiàn)已廣泛應(yīng)用于電子產(chǎn)品的生產(chǎn)制造中。下面，作者以多年設(shè)計(jì)印制板的經(jīng)驗(yàn)，著重印制板的電氣性能，結(jié)合工藝要求，從印制板穩(wěn)定性、可靠性方面，來(lái)談?wù)劧鄬又瓢逶O(shè)計(jì)的基本要領(lǐng)。

標(biāo)簽： 多層印制板

上傳時(shí)間： 2013-11-19

上傳用戶：zczc
計(jì)算FR4上的差分阻抗(PDF)

Calculation of the Differential Impedance of Tracks on FR4 substrates There is a discrepancy between calculated and measured values of impedance for differential transmission lineson FR4. This is especially noticeable in the case of surface microstrip configurations. The anomaly is shown tobe due to the nature of the substrate material. This needs to be considered as a layered structure of epoxy resinand glass fibre. Calculations, using Boundary Element field methods, show that the distribution of the electricfield within this layered structure determines the apparent dielectric constant and therefore affects theimpedance. Thus FR4 cannot be considered to be uniform dielectric when calculating differential impedance.

標(biāo)簽： FR4 計(jì)算差分阻抗

上傳時(shí)間： 2014-12-24

上傳用戶：DE2542
基于FPGA的高度集成DCDC穩(wěn)壓器

In a recent discussion with a system designer, the requirementfor his power supply was to regulate 1.5Vand deliver up to 40A of current to a load that consistedof four FPGAs. This is up to 60W of power that must bedelivered in a small area with the lowest height profi lepossible to allow a steady fl ow of air for cooling. Thepower supply had to be surface mountable and operateat high enough effi ciency to minimize heat dissipation.He also demanded the simplest possible solution so histime could be dedicated to the more complex tasks. Asidefrom precise electrical performance, this solution had toremovethe heat generated during DC to DC conversionquickly so that the circuit and the ICs in the vicinity do notoverheat. Such a solution requires an innovative designto meet these criteria:

標(biāo)簽： FPGA DCDC 集成穩(wěn)壓器

上傳時(shí)間： 2013-11-24

上傳用戶：defghi010
LTM4601 DC/DC微型模塊性能

The LTM4601 DC/DC μModule regulator is a completehigh power density stepdown regulator for up to 12Acontinuous (14A peak) loads. The device is housed ina small 15mm ¥ 15mm ¥ 2.8mm LGA surface mountpackage, thus the large power dissipation is a challengein some applications. This thermal application note willprovide guidelines for using the μModule regulator inambient environments with or without air fl ow. Loadcurrent derating curves are provided for several inputvoltages and output voltages versus ambient temperatureand air fl ow.

標(biāo)簽： 4601 DC LTM 微型模塊

上傳時(shí)間： 2013-10-19

上傳用戶：bakdesec
LTM4600 DCDC微型模塊熱性能

The LTM4600 DC/DC μModule regulator is a complete highpower density stepdown regulator for 10A continuous (14Apeak) loads. The device has two voltage options: 20VINmaximum for the LTM4600EV and 28VIN maximum for theLTM4600HVEV each housed in a small 15mm ¥ 15mm ¥2.8mm LGA surface mount package.

標(biāo)簽： 4600 DCDC LTM 微型模塊

上傳時(shí)間： 2013-10-10

上傳用戶：adada

亚洲欧美第一页_禁久久精品乱码_粉嫩av一区二区三区免费野_久草精品视频

亚洲欧美第一页_禁久久精品乱码_粉嫩av一区二区三区免费野_久草精品视频

surface

SCATTERING, RADIATION AND PROPAGATION OVER TWO-DIMENSIONAL RANDOM surface,小倉(cāng)老師關(guān)于隨機(jī)泛函博散射的專著

是英文 “ surface mount technology ”的縮寫。即表面安裝技術(shù)

In this program we calculate the scattering field of a infinite rectangular surface. I use Physical

Bezier surface in c. Without compiler. This is very good - I think.

VGA 8:1 multiplexer reference

多層印制板設(shè)計(jì)基本要領(lǐng)

計(jì)算FR4上的差分阻抗(PDF)

基于FPGA的高度集成DCDC穩(wěn)壓器

LTM4601 DC/DC微型模塊性能

LTM4600 DCDC微型模塊熱性能