第一章 传输线理论一 传输线原理二 微带传输线三 微带传输线之不连续分析第二章 被动组件之电感设计与分析一 电感原理二 电感结构与分析三 电感设计与模拟四 电感分析与量测传输线理论与传统电路学之最大不同，主要在于组件之尺寸与传导电波之波长的比值。当组件尺寸远小于传输线之电波波长时，传统的电路学理论才可以使用，一般以传输波长（Guide wavelength）的二十分之ㄧ（λ/20）为最大尺寸，称为集总组件（Lumped elements）；反之，若组件的尺寸接近传输波长，由于组件上不同位置之电压或电流的大小与相位均可能不相同，因而称为散布式组件（Distributed elements）。 由于通讯应用的频率越来越高，相对的传输波长也越来越小，要使电路之设计完全由集总组件所构成变得越来越难以实现，因此，运用散布式组件设计电路也成为无法避免的选择。 当然，科技的进步已经使得集总组件的制作变得越来越小，例如运用半导体制程、高介电材质之低温共烧陶瓷（LTCC）、微机电（MicroElectroMechanical Systems, MEMS）等技术制作集总组件，然而，其中电路之分析与设计能不乏运用到散布式传输线的理论，如微带线（Microstrip Lines）、夹心带线（Strip Lines）等的理论。因此，本章以讨论散布式传输线的理论开始，进而以微带传输线为例介绍其理论与公式，并讨论微带传输线之各种不连续之电路，以作为后续章节之被动组件的运用。
标签： 传输线
上传时间： 2013-11-10
上传用户：潇湘书客
8051参考设计，与其他8051的免费IP相比，文档相对较全，Oregano System 提供 This is version 1.3 of the MC8051 IP core. September 2002: Oregano Systems - Design & Consulting GesmbH Change history: - Improved tb_mc8051_siu_sim.vhd to verify duplex operation. - Corrected problem with duplex operation in file mc8051_siu_rtl.vhd
上传时间： 2013-11-06
上传用户：XLHrest
a8259 可编程中断控制 altera提供 The a8259 is designed to simplify the implementation of the interrupt interface in 8088 and 8086 based microcomputer systems. The device is known as a programmable interrupt controller. The a8259 receives and prioritizes up to 8 interrupts, and in the cascade mode, this can be expanded up to 64 interrupts. An asynchronous reset and a clock input have been added to improve operation and reliability.
上传时间： 2015-01-02
上传用户：panpanpan
Abstract: As industrial control systems (ICSs) have become increasingly connected and use more off-the-shelfcomponents, new vulnerabilities to cyber attacks have emerged. This tutorial looks at three types of ICSs:programmable logic controllers (PLCs), supervisory control and data acquisition (SCADA) systems, anddistributed control systems (DCSs), and then discusses security issues and remedies. This document alsoexplains the benefits and limitations of two cryptographic solutions (digital signatures and encryption) andelaborates on the reasons for using security ICs in an ICS to support cryptography.
上传时间： 2013-10-09
上传用户：woshinimiaoye
Modern electronic systems solve so many difficult problems that they often seem like magic. Nonetheless, these systems all have thesame basic limitation: they need a source of electrical power! Most of the time this is a straightforward challenge for the electronicdesigner, because there are many power-delivery solutions. Yet sometimes a device has no direct power source, and running wiresor replacing batteries is impractical. Even when long-life batteries are usable, they eventually need to be replaced, which requires aservice call.
标签： 能量收集
上传时间： 2015-01-03
上传用户：zukfu
The high defi nition multimedia interface (HDMI) is fastbecoming the de facto standard for passing digitalaudio and video data in home entertainment systems.This standard includes an I2C type bus called a displaydata channel (DDC) that is used to pass extended digitalinterface data (EDID) from the sinkdevice (such as adigital TV) to the source device (such as a digital A/Vreceiver). EDID includes vital information on the digitaldata formats that the sink device can accept. The HDMIspecifi cation requires that devices have less than 50pFof input capacitance on their DDC bus lines, which canbe very diffi cult to meet. The LTC®4300A’s capacitancebuffering feature allows devices to pass the HDMI DDCinput capacitance compliance test with ease.
上传时间： 2013-11-21
上传用户：tian126vip
ACPR (adjacent channel power ratio), AltCPR (alternatechannel power ratio), and noise are important performancemetrics for digital communication systems thatuse, for example, WCDMA (wideband code division multipleaccess) modulation. ACPR and AltCPR are bothmeasures of spectral regrowth. The power in the WCDMAcarrier is measured using a 5MHz measurement bandwidth;see Figure 1. In the case of ACPR, the total powerin a 3.84MHz bandwidth centered at 5MHz (the carrierspacing) away from the center of the outermost carrier ismeasured and compared to the carrier power. The resultis expressed in dBc. For AltCPR, the procedure is thesame, except we center the measurement 10MHz awayfrom the center of the outermost carrier.
上传时间： 2013-11-02
上传用户：maricle
Frequently, voltage reference stability and noise defi nemeasurement limits in instrumentation systems. In particular,reference noise often sets stable resolution limits.Reference voltages have decreased with the continuingdrop in system power supply voltages, making referencenoise increasingly important. The compressed signalprocessing range mandates a commensurate reductionin reference noise to maintain resolution. Noise ultimatelytranslates into quantization uncertainty in A to D converters,introducing jitter in applications such as scales, inertialnavigation systems, infrared thermography, DVMs andmedical imaging apparatus. A new low voltage reference,the LTC6655, has only 0.3ppm (775nV) noise at 2.5VOUT.Figure 1 lists salient specifi cations in tabular form. Accuracyand temperature coeffi cient are characteristic ofhigh grade, low voltage references. 0.1Hz to 10Hz noise,particularly noteworthy, is unequalled by any low voltageelectronic reference.
上传时间： 2013-10-30
上传用户：wxhwjf
Automobiles, aircraft, marine vehicles, uninterruptiblepower supplies and telecom hardware represent areasutilizing series connected battery stacks. These stacksof individual cells may contain many units, reaching potentialsof hundreds of volts. In such systems it is oftendesirable to accurately determine each individual cell’svoltage. Obtaining this information in the presence of thehigh “common mode” voltage generated by the batterystack is more diffi cult than might be supposed.
上传时间： 2013-10-24
上传用户：kang1923
This application note discusses a variety of approaches for interfacing analog signals to 5V powered systems. Synthesizing a "rail-to-rail" op amp and scaling techniques for A/D converters are covered. A voltage-to-frequency converter, applicable where high resolution is required, is also presented.
上传时间： 2013-10-12
上传用户：181992417
