0
Today, all diodes are semiconductor diodes. However, the first diodes were piles of washers of different metals that together made a diode, and specially constructed vacuum tubes.
There may still be markets for other types of diodes in very high voltage circuits, but you or i are unlikely to come in contact with them.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
What type of rectifier used in radar?
the usual semiconductor rectifier used in the microwave band is a gunn diode. Vacuum tube diodes are sometimes used too.
What are special purpose diodes?
Special diode does special function. Diodes are originally used to rectify ac current into dc current . Other versions of diodes are constructed in a similar way using the same principles but their function is not rectification such as light emmision diode
Different between schottky diode and zener diode?
pn junction diode conducts current in one directions where as the zener diode conducts in both the directions. large current flow damage the PN junction diode but zener diode conducts eventhough there is a large current........
What is diode rectifier?
By definiton, a diode lets electrical current flow only in one direction. A RECTIFIER DIODE is basically the same thing. It is used mainly for power supply operation and can handle higher current flow than a regular diode. Diodes are rated from milliamps to as high as 100 amps per diode depending upon the diode style and amperage rating. A recitifier diode is the same as a "Power diode". Diodes are mainly used to change AC (alternating current) into DC (directo current) which is used by batteries and etc.
What are the parts in a diode?
That depends on the diode, however I will talk about a very basic one. Simple version: One side is called the anode, the other is the cathode. Current only flows from the anode to toward the cathode. It is blocked from traveling in the other direction. Less simple version: I am including this since you asked about the parts "in" a diode and not the parts "of" a diode. Diodes are semiconductor devices and are constructed with two pieces of semiconductor material (silicon, germanium, etc), one of which has been designed with extra electrons in it (cathode side) and one with extra spots for electrons to occupy (anode side) . Remember current flowing in one direction means electrons are traveling in the opposite direction. Now, if you apply enough positive voltage to the cathode, current will flow to the anode, but it will damage the diode if it is not designed to handle it. Some diodes are even designed to be used this way (look up zener diodes). To really understand the physics of what is happening in these materials, you need some knowledge of quantum mechanics (not joking) but that is beyond this question. Hope you got what you needed.
How semiconductor diodes operates?
semiconductor diode with out a pn junction.
What Diodes contains a metal semiconductor junction?
Schottky Diode
Does semiconductor lasers and laser diodes are similar?
Semiconductor lasers are made with laser diodes, with added circuitry to measure and regulate the diode current/output.
Who invented the first semiconductor diode what it is called as and from which metal it is made up of?
The first modern semiconductor diode was made with germanium. These diodes were invented in ww2 for RADAR. But before that semiconductor diodes were made with galena (lead sulfide), copper oxide, and selenium. I have no idea which was "first".
What kind of gas is in a red LASER diode?
None, LASER diodes are solid state semiconductor devices.
How replace branches of diode with zener diode?
You do not want to replace diodes with zener diodes. They are not the same type of device, and the design objective is not the same.
Why do we get current in reverse bias?
because semiconductor diodes are not perfect insulators when reverse biased. if you want a diode that is a perfect insulator when reverse biased, use a vacuum tube diode.
What are the differences between power diode and signal diode?
Simple diode is a two-terminal pn-junction with appropriate contacts for connecting the junction to external circuits. Power diode is formed by alloying, diffusion, and epitaxial growth. The modern techniques in semiconductor fabrication processes permit the desired device characteristics. The operation of power diodes is similar to that of signal diodes; but it has larger power-, voltage-, and current-handling capabilities than those of ordinary diodes. Switching speed of the power diodes is low compared to that of signal diodes.
What is the difference between a semiconductor diode and a microwave diode?
The primary difference is that a semiconductor diode is a diode with a p-n junction, and a light-emitting diode is a special case or special type of semiconductor diode that emits light when it is forward biased.
What is a semiconductor diode and their application?
It can be either a junction or point contact diode built with semiconductor material. there are many types depending on intended usage.junction diode is produced as described in its name by forming a junction in the semiconductor by using opposite types of dopant impurities.point contact diode is produced as described in its name by taking a semiconductor base and pressing a sharp metal point on its surface.A few of the types of semiconductor diodes are: small signal, power rectifier, zener, tunnel, gunn, etc.
Why Si is used than Ge in semiconductor diode?
silicon diodes Cut in voltage is 0.7 V.but the Germanium cut in voltage is 0.3 V that's why .............
What type of rectifier used in radar?
the usual semiconductor rectifier used in the microwave band is a gunn diode. Vacuum tube diodes are sometimes used too.
