How Do You Solve Complex MOSFET Equations in Homework Problems?

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SUMMARY

This discussion focuses on solving complex equations involving MOSFETs in homework problems. The participants emphasize the importance of recognizing relationships between MOSFETs, particularly when their IDs are equal. A suggested approach involves solving one of the ID equations for the voltage VA and substituting it into the other equation to derive the I-V relationship without directly involving VA. This method streamlines the problem-solving process and enhances understanding of MOSFET interactions.

PREREQUISITES
  • Understanding of MOSFET operation and characteristics
  • Familiarity with circuit analysis techniques
  • Knowledge of I-V characteristics of semiconductor devices
  • Proficiency in algebraic manipulation of equations
NEXT STEPS
  • Study the derivation of I-V relationships for different MOSFET configurations
  • Learn about the impact of threshold voltage on MOSFET performance
  • Explore circuit simulation tools like LTspice for MOSFET analysis
  • Investigate the use of small-signal models in MOSFET circuit design
USEFUL FOR

Electrical engineering students, circuit designers, and anyone involved in semiconductor device analysis will benefit from this discussion.

CoolDude420
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Homework Statement



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Homework Equations

The Attempt at a Solution


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I think that up there is right so far since I didn't see any other relationship between the two MOSFETS other than their IDs are equal. But after I keep simplifying that equality, I end up with this

ef1557abf7.png


I have no idea what to do with this now.
 

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I haven't tried this, but if you could solve one of your ID equations for VA, then substitute that for VA in the other, you'd have the I–V relation for the combination without involving VA.
 

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