Hello, readers welcome to the new post. We will discuss Difference between BJT and MOSFET. These two are electronic components and belongs to the transistor family. But used for different applications on the basis of different structures.
In this post, we will discuss different parameters to find the differences between these two transistors. So let’s get started
Difference between BJT and MOSFET
What is BJT
- BJT stands for bipolar junction transistors and its structure consists of two PN junctions. It has two types NPN and PNP.
- 3 pins have these components emitter-base and collector.
- In the case of NPN transistors, this component as P layers positioned between the two N regions. while in the case of PNP, N layer is positioned between two P layers.
- Its common applications are amplifier circuits switching and oscillators. It is known as current-controlled components that use base current to regulate the emitter and collector current. The collector has larger parts and has a large value of current.
- The small value of signal given at the base pin of transistors will get in amplified at the collector. There is no need for a DC power supply to perform the amplification
- Two charge carriers help to flow current in the BJT electrons and holes.
- The larger value current is collectors that is regulated through the base current IB and this feature helps to use for switches and amplifier circuits.
- BJT is known as the current controlled module
MOSFET
- MOSFET stands for metal oxide semiconductor field effect transistor created through the use of semiconductor material.
- It commonly used transistors have 3 pinouts that are gate source and drain.
- It comes with a metallic structure at the upper part of silicon oxide layers below with semiconductors.
- There are two types of these transistors E MOSFET and D MOSFET.
- E MOSFET remains off in normal operating conditions and needs gate volts to get on where the depletion MOSFET is on during normal conditions need gate volts to get off
- It is also very often used in digital, and analog circuits and power devices.
- The main advantage of MOSFETs is that no input current is needed to regulate the load current as required in a BJT.
BJT vs MOSFET
- The main types of BJT are NPN and PNP, while types of MOSFET are E MOSFET and D MOSFET.
- BJT pins are emitter-base and collector, and MOSFET pins are gate source and drain.
- BJT is bipolar and MOSFET is a unipolar transistor.
- For BJT, electrons and holes work as charge carriers, and for MOSFET, anyone can work as a charge carrier.
- BJT is used for current control applications, and MOSFET is used for voltage control circuits.
- The switching speed of BJT is one hundred kilohertz, and MOSFET has 300 kHz.
- The value of input impedance for BJT is less than MOSFET.
- Output impedance for BJT is low, and MOSFET has a medium level.
- BJT has a negative temperature coefficient not used for parallel operations, and MOSFET is used for parallel operations since it has a positive temperature coefficient.
- MOSFET uses less power than the BJT.
What is the difference between a MOSFET and transistor?
- There are two basic types of transistors. BJT, and the second is the field effect transistor. MOSFET is a type of FET, and BJT is used for electrical current for one ampere, and MOSFET is used for high current applications.
Why is MOSFET used?
- The MOSFET is a common type of transistor used in circuits and used for controlling conductivity or current flow between source and drain according to voltage at the gate terminal.
What is the advantage of MOSFET?
- The basic feature of MOSFET is that it needs no input current for controlling load current as compared to BJT. The voltage applied to gate terminals increases conductivity in enhancement mode. MOSFET
What are the characteristics of MOSFET?
- It has 3 pins and a unipolar device, is regulated with voltage, and comes with high input impedance.
What is the main application of MOSFET?
- Power MOSFET is used in automotive electronics, especially for switching devices in electronic control units and power inverters in different electric vehicles.
Which is faster, BJT or MOSFET?
- MOSFET comes with high speed as compared to BJT because MOSFET comes with majority carriers for current. Devices switch at high speed as compared to BJT and are used for switching power supplies.
What are the advantages of BJT?
- The BJT has advantages over CMOS technology with high output impedance and larger transconductance since high current gain exists.
What are the two types of MOSFETs?
- The common types of MOSFET are P-channel depletion MOSFET and P-channel enhancement MOSFET.
What is the main advantage of MOSFET?
- The basic benefit of MOSFET is that it does not have a gate current and does not have an input current. It comes with high input impedance since insulation layers. It uses low energy in its work since a low leakage current exists. It provides a high switching speed.
What is the working principle of a MOSFET?
- The basic working of a MOSFET is that it has a feature to control voltage and current flow in source and drain pins. It works like a switch and is operated like devices configured on a MOS capacitor. MOS capacitors is work as the main component of MOSFET.
That is all about the Difference between BJT and MOSFET all details have been explained to find the differences between BJT and MOSFET. If you have any queries ask in the comments. Thanks for reading have a nice day