How Does Current Flow Through an N-Channel MOSFET?

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In summary, the conversation discusses how current flows through an n-channel MOSFET by applying positive voltage to the drain and negative voltage to the substrate, creating a depletion layer that is depleted of mobile charges. The drain is also reverse biased. The conversation also mentions the possibility of a drift current from source to drain, similar to that in BJTs. A resource is provided for further reading on the structure and channel formation of MOSFETs.
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How current flows through n channel mosfet since bassicaly by applying positive voltage to the drain and negative to the substrate we actualy make the depletion layer grow widher. I mean when there is positive voltage at the gate it attracts electrons and thus creating a layer underneath the gate and between S and D that is depleted of mobile charges. And the drain is also reverse biased.

The Attempt at a Solution


Is there some kind of drift current from S to D like in the bjts?
 
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FAQ: How Does Current Flow Through an N-Channel MOSFET?

1. What is a MOSFET?

A MOSFET (metal-oxide-semiconductor field-effect transistor) is a type of transistor that is commonly used in electronic circuits to control the flow of electricity.

2. How does a MOSFET work?

A MOSFET works by using an electric field created by a voltage applied to the gate terminal to control the flow of current between the source and drain terminals. When a voltage is applied to the gate, it creates an electric field that either allows or blocks the flow of electricity between the source and drain terminals.

3. What is the difference between N-channel and P-channel MOSFETs?

The main difference between N-channel and P-channel MOSFETs is the type of charge carriers that they use to conduct electricity. N-channel MOSFETs use electrons as charge carriers, while P-channel MOSFETs use holes as charge carriers. This results in different voltage polarities and directions of current flow for each type of MOSFET.

4. What is the importance of MOSFET current flow?

MOSFET current flow is important because it allows for the efficient control of electric current in electronic circuits. By controlling the flow of current through a MOSFET, different electronic components and devices can be turned on or off, allowing for a wide range of functions and applications.

5. How do you calculate the current flow through a MOSFET?

The current flow through a MOSFET can be calculated using Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). In this case, the resistance is the channel resistance of the MOSFET. By knowing the voltage applied to the gate and the channel resistance, the current flow through the MOSFET can be determined.

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