Which Is Better BJT Or Mosfet?

Why Mosfet is preferred over BJT?

The obvious advantage of a MOSFET is its very low drain-source on state voltage drop because of a very low drain-source on state resistance (RDSON).

For a BJT, the collector-emitter saturation voltage may vary with the level of the base current and the collector current or simply the load..

Which transistor is best for switching?

Best Transistors: BJTs#1 NPN – 2N3904. You can find most often NPN Transistors in low-side switch circuits. … #2 PNP – 2N3906. For high-side switch circuits, you need a PNP style BJT. … #3 Power – TIP120. … #4 N-Channel (Logic Level) – FQP30N06L.

What is the fastest transistor?

IBM claims 210-GHz SiGe transistor is world’s fastest, four years ahead of competition. EAST FISHKILL, N.Y. –IBM Corp. today announced development of a new silicon-germanium (SiGe) transistor, which is capable of reaching speeds of 210 GHz while drawing only a milliamp of electrical current.

Where is Mosfet used?

Power MOSFETs are commonly used in automotive electronics, particularly as switching devices in electronic control units, and as power converters in modern electric vehicles. The insulated-gate bipolar transistor (IGBT), a hybrid MOS-bipolar transistor, is also used for a wide variety of applications.

What is the working of Mosfet?

In general, the MOSFET works as a switch, the MOSFET controls the voltage and current flow between the source and drain. The working of the MOSFET depends on the MOS capacitor, which is the semiconductor surface below the oxide layers between the source and drain terminal.

Why is CMOS better than BJT?

CMOS gates dissipate power only while switching and NOT while they are “open”(transistor off) or “close”(transistor on). Hence, reduced power consumption. The dimensions of MOS devices can be scaled down more easily and have lesser fabrication cost compared to BJT.

What is the symbol of Mosfet?

The line in the MOSFET symbol between the drain (D) and source (S) connections represents the transistors semiconductive channel. If this channel line is a solid unbroken line then it represents a “Depletion” (normally-ON) type MOSFET as drain current can flow with zero gate biasing potential.

Can I replace transistor with Mosfet?

Since switching voltages above 5 V or up to 12 V is easily available from most digital and analogue ICs, mosfets can be quickly interfaced with any source irrespective of the load current. So it means, in general we can easily replace a BJT with a mosfet, provided we take care of the relevant polarities.

What are the two types of Mosfet?

There are two classes of MOSFETs. There is depletion mode and there is enhancement mode. Each class is available as n- or a p-channel, giving a total of four types of MOSFETs. Depletion mode comes in an N or a P and an enhancement mode comes in an N or a P.

What is the difference between mosfet and BJT?

The BJT is a bipolar junction transistor whereas MOSFET is a metal oxide semiconductor field-effect transistor. … BJT’s are used for low current applications, whereas MOSFET is used for high power applications. Nowadays, in analog and digital circuits, MOSFETs are treated to be more commonly used than BJTS.

Which transistor has higher gain BJT or Mosfet and why?

BJT have more gain than MOSFET because MOSFET shows Quadratic I-V characteristics and BJT shows Exponential I-V characteristics and the change in exponential behavior is more as compared to Quadratic behavior. where Va is Early Voltage. It is a process parameter and its value lies in between 35V to 130V.

Which is the fastest switching device?

MOSFETExplanation: MOSFET is the fastest switching device among the given four options.

What is switching speed?

switching speed (toggling speed) A measure of the rate at which a given electronic logic device is capable of changing the logic state of its output in response to changes at its input. It is a function of the delay encountered within the device, which in turn is a function of the device technology.

What are the advantages and disadvantages of Mosfet?

Advantages and disadvantages of MOSFETAbility to scale down in size.It has low power consumption to allow more components per chip surface area.MOSFET has no gate diode. … It read directly with very thin active area.They have high drain resistance due to lower resistance of a channel.Physical size is less than 4 mm^2 when it is a package form.More items…

What is the advantage of Mosfet?

Advantages of MOSFET MOSFETs provide greater efficiency while operating at lower voltages. Absence of gate current results in high input impedance producing high switching speed. They operate at lower power and draws no current.