SEMICONDUCTORS AND ELECTRONIC DEVICES - Electronics Articles

Junction Diodes

There were some historic crude, but useable semiconductor rectifiers before high purity materials were available. Ferdinand Braun invented a lead sulfide, PbS, based point contact rectifier in 1874. Cuprous oxide rectifiers were used as power rectifier ...

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Appliacations of Power Capacitors

Introduction Shunt and series reactive compensation using capacitors has been a widely recognized and powerful method to combat the problems of voltage drops, power losses and voltage flicker in power distribution networks. The importance of ...

0 Comments. 1764 views since Oct 4, 2008

IGFET: Insulate Gate Field Effect Transistor(MOSFET)

The Insulated-gate field-effect transistor (IGFET) , also known as the Metal oxide field effect transistor (MOSFET) , is a derivative of the field effect transistor (FET). Today, most tr ...

0 Comments. 1624 views since Sep 29, 2008

Monostable Multivibrator

The pulse detector used within the circuitry of flip-flops, to enable the latch portion for a brief time when the clock input signal transitions from either low to high or high to low. The pulse detector is classified as a monostable multivibrator beca ...

0 Comments. 1046 views since Oct 1, 2008

Equus 3320 Auto Ranging Digital Multimeter

Every electronic maniac needs a Multimeter, which’s his basic tool. From the plenty of multimeters available in the market, how to choose the BEST one? I thought of reccomending the one I use for my readers. I have been using Equus 3320 Auto-Ranging Digital Multimeter for a year or so and I must say I am more than satisfied with this Auto Ranging multimeter. ...

0 Comments. 1045 views since Aug 27, 2010

Conductor Ampacity

The smaller the wire, the greater the resistance for any given length, all other factors being equal. A wire with greater resistance will dissipate a greater amount of heat energy for any given amount of current, the power being equal to P=I2R. D ...

0 Comments. 908 views since Oct 23, 2008

P-N Junction

If a block of P-type semiconductor is placed in contact with a block of N-type semiconductor in Figure below(a), the result is of no value. We have two conductive blocks in contact with each other, showing no unique properties. The problem is two separ ...

0 Comments. 876 views since Sep 28, 2008

Semiconductor Devices in SPICE

The SPICE ( Simulation Program, Integrated Circuit Emphasis ) electronic simulation program provides circuit elements and models for semiconductors. The SPICE element names begin with d, q, j, or m correspond to diode, BJT, JFET and MOSF ...

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Valence

Valence : The electrons in the outer most shell, or valence shell, are known as valence electrons. These valence electrons are responsible for the chemical properties of the chemical elements. It is these electrons which participate in ...

0 Comments. 841 views since Sep 28, 2008

Bipolar Junction Transistors

The bipolar transistor (BJT) was named because its operation involves conduction by two carriers: electrons and holes in the same crystal. The first bipolar transistor was invented at Bell Labs by William Shockley, Walter Brattain, and John Bardeen so ...

0 Comments. 841 views since Sep 29, 2008

Full Adder

The half-adder is extremely useful until you want to add more that one binary digit quantities. The slow way to develop a two binary digit adders would be to make a truth table and reduce it. Then when you decide to make a three binary digit adder, do ...

0 Comments. 810 views since Oct 1, 2008

Electrons & Holes

Pure semiconductors are relatively good insulators as compared with metals, though not nearly as good as a true insulator like glass. To be useful in semiconductor applications, the intrinsic semiconductor, pure undoped semiconductor must have no more ...

0 Comments. 797 views since Sep 29, 2008

Band Theory of Solids

Quantum physics describes the states of electrons in an atom according to the four-fold scheme of quantum numbers. The quantum numbers describe the allowable states electrons may assume in an atom. To use the analogy of an amphitheater, quantum numbers ...

0 Comments. 782 views since Sep 24, 2008

Fundamentals of Electrostatics

For centuries people pondered lightning, lodestones, static electricity and other electromagnetic phenomenon without developing even rudimentary explanations or models. (I am summarily dismissing "Zeus throwing bolts" as an explanation!) It is hard to ...

0 Comments. 774 views since Oct 4, 2008

Conductors

Those materials allowing for easy passage of free electrons are called conductors, while those materials impeding the passage of free electrons are called insulators. Unfortunately, the scientific theories explaining why certain materials conduct ...

0 Comments. 766 views since Oct 23, 2008

Superconducting Devices

Superconducting devices, though not widely used, have some unique characteristics not available in standard semiconductor devices. High sensitivity with respect to amplification of electrical signals, detection of magnetic fields, and detection of ligh ...

0 Comments. 765 views since Sep 29, 2008

Permanent Magnets

Centuries ago, it was discovered that certain types of mineral rock possessed unusual properties of attraction to the metal iron. One particular mineral, called lodestone, or magnetite, is found mentioned in very old historical records (about 2500 year ...

0 Comments. 755 views since Oct 23, 2008

Crystal Structure

Crystal Structure: Most inorganic substances form their atoms (or ions) into an ordered array known as a crystal . The outer electron clouds of atoms interact in an orderly manner. Even metals are composed of crystals a ...

0 Comments. 747 views since Sep 28, 2008

Semiconductor Manufacturing Techniques

Her we will discuss about the manufacture of only silicon based semiconductors; most semiconductors are silicon. Silicon is particularly suitable for integrated circuits because it readily forms an oxide coating, useful in patterning integrated compone ...

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Recent Trends in Instrumentation

A wireless charging mat, the general concept of the mat is simple: place your electronic device on the mat, and it will charge. It is, in effect, trying to invent wireless electricity. ...

0 Comments. 678 views since Aug 24, 2010

Semiconductor Fuzzy Multiple Objectives Programming to DEAM

With the increasing use of total quality management (TQM) and just-in-time (JIT) concepts within a wide range of firms, the question of supplier selection has become extremely important (Verma and Pullman 1998). Bankar and Khoska (1995) classified the supplier selection process as an important operational management (OM) decision. ...

0 Comments. 526 views since Aug 27, 2010

Air Conditioner Florida is the perfect relaxing apparatus

These are various major issues connected with the need of air conditioning maintenance. To get the finest of service install air condition Florida. Air conditioner Florida provides with the very best air conditioning Florida. ...

0 Comments. 508 views since Jan 6, 2011