Investigating the effects of changing the length and width of transistor channel

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SUMMARY

The discussion focuses on the impact of changing the width and length of a transistor channel on the threshold voltage (Vt). The user, Seán, seeks confirmation on using the equation Id = β ((Vg-Vt)Vd - Vd²/2) for this investigation, where β is defined as (μ0 W Cox/L). The parameters provided include the starting threshold voltage, mobility figure, and oxide thickness. The conversation emphasizes the importance of theoretical backing for simulation results in transistor design.

PREREQUISITES
  • Understanding of transistor operation and characteristics
  • Familiarity with the equation Id = β ((Vg-Vt)Vd - Vd²/2)
  • Knowledge of mobility (μ0), oxide capacitance (Cox), and their roles in transistor behavior
  • Experience with simulation tools for electronic circuit analysis
NEXT STEPS
  • Research the effects of channel length modulation on threshold voltage
  • Explore the role of oxide thickness in transistor performance
  • Learn about mobility variations in different semiconductor materials
  • Investigate simulation software options for transistor modeling, such as SPICE
USEFUL FOR

Electrical engineering students, semiconductor researchers, and professionals involved in transistor design and simulation.

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Hello,

I posted this here because it is for a bit of course work, but I am just looking to confirm if I am using the right equation. I hope this is ok! If not, sorry! I just didn't think since I was asking a specific assignment question, I would post here.

I need to investiage how changing the width and length of a transistor channel effects the threshold voltage. I need to do this in a simulation package and in theory. The simulation is grand, so now I just need to back it up.

I have been given a few parameters, such as a starting threshold voltage, figure for mobability, thickness of oxide. So, would I be correct in using, and rearranging the following equation to see how the Vt changes?

Id = β ((Vg-Vt)Vd - Vd2/2)

Where β = (\mu0 W Cox/L)

I have some issues rearrenging equations, but if I know I am on the right path, I can work on it.

Thanks in advance.

Seán
 
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Opps, guess I did post in the wrong place.

Sorry!

Seán
 

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