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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If the current through the diode has the direction indicated in Fig. Eletornica will appear in a range of applications,extending from the simple to the very complex. In metric units,the resistivity of a material is measured in -cm or -m. For conventional flow opposite to that of electron flowif the resultant diode current has the same direction as the arrowhead of the diode symbol,the diode is operating in the conducting region as depicted in Fig.

The ideal diode, therefore, is an open circuit in the region of nonconduction.

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 tables,the term resistivity ,Greek letter rho is often used when comparing the resistance levels of materials.

The prefix semiis normally applied to a range of levels midway between two limits. In recent years the shift has been steadily toward silicon and away from germanium,but germanium is still in modest production. Inversely related to the conductivity of a material is its resistance to the flow of charge,or current.

If the polarity of the applied voltage is consistent with that shown in Fig. They are,however,the two materials that have received the broadest range of interest in the development of semiconductor devices.


Electronic Devices – Eletronica analogica

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. Electronic Devices Bento Alves row Enviado por: In the description of the elements to follow,it is critical that the various letter symbols,voltage polarities,and anaolgica directionsbe defined.

We also want to thank Rex Davidson, Production Editor at Prentice Hall, for keeping together the many detailed aspects of production. In fact,if the area of Fig.

The first edition of this text contained heavy coverage of tubes,with succeeding editions involving the important decision of how much coverage should be dedicated to tubes and how much to semiconductor devices. One of the important parameters for the diode is the resistance at the point or re- gion of operation. As indicated earlier,the primary purpose of this section analoggica to introduce the characteristics of an ideal device for comparison with the characteristics of the commercial variety.

Eletronica analogica Apostila sobre eletronica analogica 1. If a reverse voltage is applied,the characteristics to the left are pertinent. An insulator is a material that offers a very low level of conductivity under pressure from an applied voltage source. New designs and systems surface weekly. 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 the changes in one area of research or development. The comments from these individuals have enabled us to present Electronic Devices and Circuit Theory in this Seventh Edition:.

It provides a basis for comparison,and it reveals where improvements can still be made. If the resulting current has the opposite direction,as shown in Fig.


Electronic Devices

Parte 1 de 6. Although you may be familiar with the electrical properties of copper and. 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 miniaturization that has resulted leaves us to wonder about eltronica limits. It no longer seems valid to mention tubes at all or to compare the advantages of one over the other—we are firmly in the solid-state era.

As you will find in the chapters to follow,they are certainly not the only two semiconductor materials. Ideally,a diode will conduct current in the direction defined by the arrow in the symbol and act like an open circuit to any attempt to establish current in the opposite direction.

It is now some 50 years since the first transistor was introduced on December 23, The units of -cm are derived from the substitution of the units for each quantity of Fig.

Eletrônica Analógica

The characteristics of an ideal diode are those of a switch that can conduct current in only one direction. Our sincerest appreciation must be extended to the instructors who have used the text and sent in comments, corrections, and suggestions. The label semiconductoritself provides a hint as to its characteristics. We wish to thank those individuals who have shared their suggestions and evaluations of this text throughout its many editions.