rdlc data matrix

rdlc data matrix

rdlc data matrix

rdlc data matrix

rdlc data matrix

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rdlc data matrix,
rdlc data matrix,
rdlc data matrix,

rdlc data matrix,
rdlc data matrix,
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The typical graphs of the ripple voltage and switch current for the rst column of each simulation series are shown in Figs. 9.3 and 9.4. In the case of the switch subcircuit model, the error in the ripple voltage is due to a ring on the upper and lower peaks of the waveform. This appears to be related to aliasing of the waveform. A telltale sign of aliasing can be spotted if the waveform is clipped when it should be smooth. Here are some solutions to the aliasing problem: Tighten the maximum time step control (reduce TMAX). Take more data points (reduce TSTEP) if the waveform viewer is viewing interpolated data (output le data points) or TMAX if the viewer is viewing the noninterpolated internal data points from the simulator.

6

Go to any reasonably sized business park or college campus and you will see that the designers of the place have gone to great lengths to make the environment pleasing. They have tastefully positioned the buildings in such a way that they are optimally collocated, sometimes even exhibiting the sublime characteristics of Feng Shui. Interconnecting the buildings are carefully poured concrete sidewalks, angling up and over and up and over, providing walkways from one building to the next. The careful observer, however, will also notice the warren of goat trails worn into the grass that run from building to building (see Figure 6-15), demonstrating that while the angular sidewalks are aesthetically pleasing, they violate the rule that observes correctly that the shortest distance between two points is a straight line. (In fact, I maintain that architects should dispense with the sidewalks altogether, wait six months beyond building occupancy, and then pave the goat trails. It makes a lot more sense and saves on concrete). This is essentially how Wi-Fi came about and it s important because other competing standards did not follow this path and are experiencing very different market acceptance profiles. The technology was introduced in 1992 when wireless LAN companies began to make use of the 2.4 GHz spectrum component where Wi-Fi operates today. It is important to note that the technology was released before the standards were complete and manufacturers, seeing the promise of a new technological innovation, jumped on the bandwagon and began building Wi-Fi devices. Standards development efforts followed and the result was what

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operating profit margin, tax rate, depreciation rate, new investment rate, and incremental working capital rate. We discuss where to find and how to interpret the information for our estimation in the next section.

Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.

you might expect: a collection of incompatible standards that created problems in the industry that were reminiscent of the modem wars of the 1990s, when two competing and incompatible 56 Kbps modem standards were released, creating implementation paralysis throughout the industry. Hence the goat trail comparison: Wi-Fi was created as the result of a path of least resistance progression model in which developers rushed to create products. And while this resulted in rapid introduction of Wi-Fi products and services, it created a variety of problems including the release of dysfunctional standards. The technology waddled around through varying degrees of commercial success for the intervening 5 years until June 1997, when the IEEE released the initial 802.11 standard for high-speed transmission using infrared and two forms of radio transmission within the unlicensed 2.4 GHz frequency band. The first of these was frequency hopping spread spectrum (FHSS), the second was direct sequence spread spectrum (DSSS). It is useful to understand the difference between these two techniques; they are described in the following sections. We begin with an explanation of spread spectrum.

I(V2)

The idea behind spread-spectrum transmission is a simple concept: disguise a narrowband transmission within a broadband transmission by spreading or smearing the narrowband component within the broadband carrier. This is done using either of two basic techniques: frequency hopping, in which a control signal directs the two communicating devices to hop randomly from frequency to frequency to avoid eavesdropping; or direct sequence, in which the signal is combined with a random noise signal to disguise its contents under the command of a control signal that knows how to separate the signal wheat from the noise chaff.