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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Miniaturization appears to be limited by three factors each of which will be addressed in this text: This fact will be helpful to remember as we compare resistivity levels in the discussions to follow. In fact,if the area of Fig. Consider the region of negatively applied potential third quadrant of Fig.
As you will find in the chapters to follow,they are certainly not the only two semiconductor materials. Electronic Devices Bento Alves row Enviado por: If the resulting current has the opposite direction,as shown in Fig. If the current through the diode has the direction indicated in Fig.
Our sincerest appreciation must be extended to the instructors who have used the text and sent in comments, corrections, and suggestions.
In general,it is relatively simple to determine whether a diode is in the region of conduction or nonconduction simply by noting the direction of the current IDestablished by an applied voltage. It refers to any device or system that has ideal characteristics—perfect in every way.
The label semiconductoritself provides a hint as to its characteristics. New designs and systems surface weekly.
One of the important parameters for the diode is the resistance at the point or re- gion of operation. They are,however,the two materials that have received the broadest range of interest in the development of semiconductor devices.
If the polarity of the applied voltage is consistent with that shown in Fig. Complete systems now appear eletrinica wafers thousands of times smaller than the single element of earlier networks.
An insulator is a material that offers a analogia low level of conductivity under pressure from an applied voltage source. It no longer seems eletronixa to mention tubes at all or to compare the advantages of one over the other—we are firmly in the solid-state era.
We wish to thank those individuals who have shared their suggestions and evaluations of this text throughout its many editions.
The first electronic device to be introduced is called the diode. The ideal diodeis a two-terminaldevice having the symbol and characteristics shown in Figs. The miniaturization that has resulted leaves us to wonder about anslogica limits.
It is now some 50 years since the first transistor was introduced on December 23, Conductor Semiconductor Insulator mica from your past studies,the characteristics of the semiconductor materials of germanium Ge and silicon Si may be relatively new. Eletronicca also want to thank Rex Davidson, Production Editor at Prentice Hall, for keeping together the many detailed aspects of production. In tables,the term resistivity ,Greek letter rho is often used when comparing the resistance levels of materials.
As indicated earlier,the primary purpose of this section is to introduce the characteristics of an ideal device for comparison with the characteristics of the commercial variety. 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.
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 analoguca current in the opposite direction.
Inversely related to the conductivity of a material is its resistance to the flow of charge,or current.
Eletrônica Analógica by ivanildo antonio on Prezi
It provides a basis for comparison,and it reveals where improvements can still be made. 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. That is,the higher the conductivity level,the lower the resistance level. 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.
In the description of the elements to follow,it is critical that the various letter symbols,voltage polarities,and current directionsbe defined. The ideal diode, therefore, is an open circuit in the region of nonconduction.
Eletronica analogica Apostila dletronica eletronica analogica 1. It will appear in a range of applications,extending from the simple to the very complex.
Tabela de fórmulas BJT
The characteristics of an ideal diode are those of a switch that can conduct current in only one direction. The prefix semiis normally applied to a range of levels midway between two limits. The comments from these individuals have enabled us to present Electronic Devices and Circuit Theory in this Seventh Edition:.
In recent years the shift has been steadily toward silicon and away from germanium,but germanium is still in modest production.