24 jan. Eletrônica Analógica Aula Teste: Instrumentos de medição eletro-eletrônicos. Professor: Ivanildo Antonio da Silva Junior Introdução Eletrônica. Veja grátis o arquivo Eletrônica Analógica enviado para a disciplina de Física II Categoria: Trabalhos – 28 – Veja grátis o arquivo Eletrônica Analógica enviado para a disciplina de Física II Categoria: Trabalhos – 4 –
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New designs and systems surface weekly. The label semiconductoritself provides a hint as to its characteristics.
Our sincerest appreciation must be extended to the instructors who have used the text and sent in comments, corrections, and suggestions. The engineer becomes more and more limited in his or her knowledge of the broad range of advances— it is difficult enough simply to stay abreast of elegronica changes in one area of research or development. The ideal diode, therefore, is an open circuit in the region of nonconduction.
They are,however,the two materials that have received the broadest range of interest in the development of eletronoca devices.
Consider the region of negatively applied potential third quadrant of Fig. In addition to the details of its construction and characteristics,the very important data and graphs to be found on specification sheets will also eleronica covered to ensure an understanding of the terminology employed and to demonstrate the wealth of information typically available from manufacturers. This fact will be helpful to remember as we compare resistivity levels in the discussions to follow.
As you will find in the chapters to follow,they are certainly not the only two semiconductor materials. If the resulting current has the opposite direction,as shown in Fig.
In recent years the shift has been steadily toward silicon and away from germanium,but germanium is still in modest production. We also want to thank Rex Davidson, Production Editor at Prentice Hall, for keeping together the many detailed aspects of production. In the description of the elements to follow,it is critical that the various letter symbols,voltage polarities,and current directionsbe defined.
It is now some 50 years since the first transistor was introduced on December 23, The ideal diodeis a two-terminaldevice having the symbol and characteristics shown in Figs. A semiconductor, therefore, is a material that has a conductivity level somewhere between the extremes of an insulator and a conductor.
Eletronica analogica Apostila sobre eletronica analogica 1.
Electronic Devices – Eletronica analogica
The units of -cm are derived from the substitution of the units for each quantity of Fig. In general,it is relatively simple to determine whether a diode is in the region analogca conduction or nonconduction simply by noting the direction of the current IDestablished analotica an applied voltage. Although you may be familiar with the electrical properties of copper and. It is the simplest of semiconductor devices but plays a very vital role in electronic systems,having characteristics that closely match those of a simple switch.
The comments from these individuals have enabled us to present Electronic Devices and Circuit Theory in this Seventh Edition:.
One of the important eletroica for the diode is the resistance at the point or re- gion of operation. As we progress through the next few sections,keep the following questions in mind:. The miniaturization that analogiica resulted leaves us to wonder about its limits. An insulator is a material that offers a very low level of conductivity under pressure from an applied voltage source. For those of us who experienced the change from glass envelope tubes to the solid-state era,it still seems like a few short years ago.
The first electronic device to be introduced is called the diode.
Eletrônica Analógica by ivanildo antonio on Prezi
Complete systems now appear on wafers thousands of times smaller than the single element of earlier networks. In fact,if the area of Fig. If the current through the diode has the direction indicated in Fig. In metric units,the resistivity of a material is measured in -cm or -m.
It provides a basis for comparison,and it reveals where improvements can still be made. Parte 1 de 6. If the polarity of the applied voltage is consistent with that shown in Fig. Conductor Semiconductor Insulator mica from your past studies,the characteristics of the semiconductor materials of germanium Ge and silicon Si may be relatively new.
If a reverse voltage is applied,the characteristics to the left are pertinent. It will appear in a range of applications,extending from the simple to the very complex. That is,the higher the conductivity level,the lower the resistance level. It refers to any device or system that has ideal characteristics—perfect in every way. The characteristics of an ideal diode are those of a switch that can conduct current in only one direction.
Miniaturization appears to be limited by three factors each of which will be addressed in this text: