Transistor

Bipolär korsningstransistor (BJT)
Bipolar Junction Transistors are transistors that are built up of 3 regions, the base, the collector, and the emitter. Bipolar Junction transistors, different FET transistors, are current-controlled devices. A small current entering the base region of the transistor causes a much larger current flow from the emitter to the collector region. Bipolar Korsningstransistorer finns i två huvudtyper, NPN och PNP . En NPN -transistor är en där majoriteten av de nuvarande bärarna är elektroner .

Electron flowing from the emitter to the collector forms the base of the majority of current flow through the transistor. The further types of charge, holes, are a minority. PNP transistors are the opposite. In PNP transistors, the majority of current carrier holes. BJT transistors are available in two types namely PNP och NPN .

PNP -transistor
This transistor is another kind of BJT – Bipolar Junction Transistors and it contains two p-type semiconductor materials. These materials are divided through a thin n-type semiconductor layer. In these transistors, the majority charge carriers are holes whereas the minority charge carriers are electrons.

I denna transistor indikerar pilsymbolen det konventionella strömflödet . Riktningen för strömflödet i denna transistor är från emitterterminalen till samlarterminalen . Denna transistor kommer att aktiveras när basterminalen är dragen till låg som jämfört med emitterterminalen .}} är den pnp med en symbol att visas under {3 {{{}})

NPN transistor
NPN is also one kind of BJT (Bipolar Junction Transistors) and it includes two n-type semiconductor materials which are divided through a thin p-type semiconductor layer. IN the NPN transistor, the majority charge carriers are electrons whereas the minority charge carriers are holes. The electrons flow from the emitter terminal to the collector Terminal kommer att bilda strömflödet inom basterminalen för transistorn .

In the transistor, the less amount of current supply at the base terminal can cause supply huge amount of current from the emitter terminal to the collector. At present, the commonly used BJTs are NPN transistors, as the electrons mobility is higher as compared with the mobility of holes. The NPN transistor with a symbol is shown below.

Fälteffekttransistor
Field Effect Transistors are made up of 3 regions, a gate, a source, and a drain. Different bipolar transistors, FETs are voltage-controlled devices. A voltage placed at the gate controls current flow from the source to the drain of the transistor. Field Effect transistors have a very high input impedance, from several mega ohms (MΩ) av motstånd mot mycket, mycket större värden .

This high input impedance causes them to have very little current run through them. (According to ohm's law, the current is inversely affected by the value of the impedance of the circuit. If the impedance is high, the current is very low.) So FETs both draw very little current from a circuit's power source.

Således är detta idealiskt eftersom de inte stör de ursprungliga kretskraftselementen som de är anslutna till . De kommer inte att få kraftkällan att laddas ner . nackdelen med FET är att de inte ger samma amplifiering som kan fås från bipolära transistorer .}

Bipolar transistors are superior in the fact that they provide greater amplification, even though FETs are better in that they cause less loading, are cheaper, and easier to manufacture. Field Effect Transistors come in 2 main types: JFETs and MOSFETs. JFETs and MOSFETs are very similar but MOSFETs have even higher input impedance values ​​than Jfets . Detta orsakar ännu mindre belastning i en krets . FET -transistorer klassificeras i två typer, nämligen JFET och MOSFET .

Jfet
JFET står för korsningsfälteffekttransistor . Detta är enkelt såväl som en initial typ av FET-transistorer som används som motstånd, förstärkare, switchar, etc . Detta är en spänningsstyrd anordning och det inte använder några förspänningar, switchar, etc. Bland källan och dräneringen för JFET -transistorn .

The Junction Field Effect Transistor (JUGFET or JFET) has no PN-junctions but in its place has a narrow part of high resistivity semiconductor material forming a "Channel" of either N-type or P-type silicon for the majority carriers to flow through with two ohmic electrical connections at either end normally called the Drain and the Source respectively.

There are two basic configurations of a junction field-effect transistor, the N-channel JFET and the P-channel JFET. The N-channel JFET's channel is doped with donor impurities meaning that the flow of current through the channel is negative (hence the term N-channel) in the form of electrons. These transistors are accessible in both P-channel and N-channel typer .

Mosfet
MOSFET or Metal-Oxide-Semiconductor Field-Effect Transistor is most frequently used among all kinds of transistors. As the name suggests, it includes the terminal of the metal gate. This transistor includes four terminals like source, drain, gate & substrate, or body.
As compared with BJT and JFET, MOSFETs has several benefits as it provides high i/p impedance as well as low o/p impedance. MOSFETs are mainly used in low power circuits especially while designing chips. These transistors are available in two types like depletion & enhancement. Further, these types are categorized into P-channel & N-channel typer .