Operation mode of NMOS transistor, can someone check my work

In summary, the conversation discussed the operation of three NMOS transistors with varying voltage inputs. NMOS1 was in the saturation region, NMOS2 was in the triode/linear/ohmic region, and NMOS3 was on the hairy edge between the two regions. The equations for Vgs and Vgd were used to determine the operating region for each transistor.
  • #1
ddta1050
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Homework Statement


Vtn = 0.4V

NMOS1
Drain = 2.5V
Gate = 1.9V
Source = 0V

NMOS2
Drain = 0.5V
Gate = 2.2V
Source = -2.3V

NMOS3
Drain = 0.5V
Gate = 0.9V
Source = -2.5V

Homework Equations

The Attempt at a Solution


NMOS1
Vgs = Vg - Vs = 1.9V
Vgd = Vg - Vd = -0.6V
Vgd < Vtn and Vgs > Vtn
Saturation Region

NMOS2
Vgs = Vg - Vs = 2.2 - (-2.3) = 4.5V
Vgd = 2.2 - 0.5 = 1.7V
Vgd > Vtn and Vgs > Vtn
Triode/Linear/Ohmic region

NMOS3
Vgs = 0.9 - (-2.5) = 3.4V
Vgd = 0.9-0.5 = 0.4V
What region is the NMOS operating in if Vgd is equal to Vtn?
 
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  • #2
Hint: you're on the hairy edge, so to resolve the issue use the equations defining which operating region you're under.
 

FAQ: Operation mode of NMOS transistor, can someone check my work

What is the operation mode of an NMOS transistor?

The operation mode of an NMOS transistor is called the enhancement mode, where the transistor is off by default and can only be turned on by applying a positive voltage to the gate terminal.

How does an NMOS transistor work?

An NMOS transistor works by controlling the flow of electrons from the source to the drain terminal through the creation of a conductive channel between them. This is achieved by applying a voltage to the gate terminal, which creates a depletion region in the channel, allowing current to flow through.

What is the role of the gate terminal in an NMOS transistor?

The gate terminal is responsible for controlling the flow of current through the transistor. By applying a voltage to the gate terminal, the depletion region in the channel is modulated, allowing or preventing the flow of electrons from source to drain.

Can someone check my work on the operation mode of NMOS transistor?

Yes, it is always a good idea to have someone check your work to ensure accuracy and understanding. It is also helpful to consult with experts or reliable sources to verify your findings.

What are some common applications of NMOS transistors?

NMOS transistors are commonly used in digital circuits, such as in microprocessors, memory chips, and logic gates. They are also used in amplifiers and switching circuits due to their fast switching speeds and low power consumption.

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