Impurities are added to it to create a region on one side that contains negative charge carriers electronscalled an n-type semiconductorand a region on the other side that contains positive charge carriers holescalled a p-type semiconductor. When the n-type and p-type materials are attached together, a momentary flow of electrons occur from the n to the p side resulting in a third region between the two where no charge carriers are present.
Next Page After having known about various components, let us focus on another important component in the field of electronics, known as a Diode. Electronics components diodes semiconductor diode is a two terminal electronic component with a PN junction. This is also called as a Rectifier.
The anode which is the positive terminal of a diode is represented with Electronics components diodes and the cathode, which is the negative terminal is represented with K.
To know the anode and cathode of a practical diode, a fine line is drawn on the diode which means cathode, while the other end represents anode. As we had already discussed about the P-type and N-type semiconductors, and the behavior of their carriers, let us now try to join these materials together to see what happens.
Formation of a Diode If a P-type and an N-type material are brought close to each other, both of them join to form a junction, as shown in the figure below.
A P-type material has holes as the majority carriers and an N-type material has electrons as the majority carriers. As opposite charges attract, few holes in P-type tend to go to n-side, whereas few electrons in N-type tend to go to P-side.
As both of them travel towards the junction, holes and electrons recombine with each other to neutralize and forms ions. Now, in this junction, there exists a region where the positive and negative ions are formed, called as PN junction or junction barrier as shown in the figure.
The formation of negative ions on P-side and positive ions on N-side results in the formation of a narrow charged region on either side of the PN junction. This region is now free from movable charge carriers. The ions present here have been stationary and maintain a region of space between them without any charge carriers.
As this region acts as a barrier between P and N type materials, this is also called as Barrier junction.
This has another name called as Depletion region meaning it depletes both the regions. There occurs a potential difference VD due to the formation of ions, across the junction called as Potential Barrier as it prevents further movement of holes and electrons through the junction.
Biasing of a Diode When a diode or any two-terminal component is connected in a circuit, it has two biased conditions with the given supply. They are Forward biased condition and Reverse biased condition. Let us know them in detail. Forward Biased Condition When a diode is connected in a circuit, with its anode to the positive terminal and cathode to the negative terminal of the supply, then such a connection is said to be forward biased condition.
This kind of connection makes the circuit more and more forward biased and helps in more conduction. A diode conducts well in forward biased condition. Reverse Biased Condition When a diode is connected in a circuit, with its anode to the negative terminal and cathode to the positive terminal of the supply, then such a connection is said to be Reverse biased condition.
This kind of connection makes the circuit more and more reverse biased and helps in minimizing and preventing the conduction.
A diode cannot conduct in reverse biased condition.A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance); it has low (ideally zero) resistance in one direction, and high (ideally infinite) resistance in the other. A diode vacuum tube or thermionic diode is a vacuum tube with two electrodes, a heated cathode and a plate, in which electrons can flow in only one direction, from.
Diodes Incorporated is a leading global manufacturer and supplier of high-quality application specific standard products. The Jameco Difference. Jameco has been in business for over 40 years and carries over 50, semiconductors, passives, interconnects, electromechanical, power supplies, LEDs and other popular electronic components.
Summit is a global supplier of hard-to-find and obsolete electronic components. Through our worldwide distribution network, we have become many purchasing agents first (and last) call!
Through our worldwide distribution network, we have become many purchasing agents first (and last) call! Basic electronic components may be packaged discretely, as arrays or networks of like components, or integrated inside of packages such as semiconductor integrated circuits, hybrid integrated circuits, or thick film devices.
The following list of electronic components focuses on the discrete version of these components, treating such packages as . A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance); it has low (ideally zero) resistance in one direction, and high (ideally infinite) resistance in the other.