In general we can easily replace a BJT with a MOSFET, provided we take care of the relevant polarities. A bipolar transistor and a power MOSFET have very different input characteristics. MOSFETs are ideal for high-power applications whereas BJTs are more commonly used in low-current applications. It is a high-voltage, low- current device What is the main difference between MOSFETs and BJTs in terms of their IV characteristics? Being part of the field-effect transistor family, it is a current-controlled device that is constructed with 3 terminals Source. MOSFET, in short, is a metal oxide semiconductor field-effect transistor used to switch or amplify voltages in circuits. For a crude N-fet switch / emitter follower it also means that you’ve got that same ~0.7V voltage drop over the transistor instead of the mosfet >2V. Why use a MOSFET instead of a transistor?Ī mosfet requires usually a fair bit more gate voltage than the transistor ~0.7V so that’s an immediate advantage. The gate control circuit is much simpler in the mosfets. this is due to the fact that the mosfet leads by grid-oxide controlled field effect and not by electron / hole recombination (which is slow) as in bjt. Mosfet consumes much less power when switching at high frequency because of its faster switching speed. A BJT has an emitter, collector and base, while a MOSFET has a gate, source and drain. What are the major differences between BJTS and MOSFETs?īJT is a Bipolar Junction Transistor, while MOSFET is a Metal Oxide Semiconductor Field-Effect Transistor. But the term is so common that things that are not actually MOSFETs are still called “MOSFETs”, so there isn’t really much difference the terms are kind of interchangeable. All MOSFETs are FETs, not all FETs are MOSFETs. It stands for “metal oxide semiconductor field effect transistor”. What is the difference between MOSFET and FET?Ī MOSFET is a type of FET. In the PNP transistor, P stands for positive and the majority charge carriers are holes whereas in the NPN transistor, N stands for negative and the majority charge carriers are electrons. The main difference between BJT and MOSFET is their charge carriers. There are two kinds of transistors namely PNP and NPN. What is the difference between a MOSFET and a NPN transistor? A MOSFET is a type of transistor commonly used in switching/amplifier type applications, as they are usually designed for higher power use (so called “high power” transistors are mostly MOSFET and Darlington type). What are the major differences between BJTS and MOSFETs?.What is the difference between MOSFET and transistor?.
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