Help with PSpice/OrCAD Voltage Dependent Sources

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SUMMARY

The forum discussion focuses on troubleshooting voltage calculations in PSpice, specifically regarding voltage dependent sources. The user is attempting to recreate a problem from a textbook and is experiencing discrepancies between their calculations and PSpice outputs. They are particularly interested in representing a voltage with exponential decay, such as 5e^(-t). The user believes the expected voltages should be Vx=8V and Vy=10V, but feedback indicates a potential issue with the polarity of the Vx sensing in their schematic.

PREREQUISITES
  • Familiarity with PSpice simulation software
  • Understanding of voltage dependent sources in circuit analysis
  • Knowledge of exponential functions and their application in electrical circuits
  • Basic skills in interpreting circuit schematics
NEXT STEPS
  • Review PSpice documentation on voltage dependent sources
  • Learn how to model exponential decay in PSpice
  • Investigate common mistakes in circuit polarity within PSpice
  • Explore advanced circuit analysis techniques for validating simulation results
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Electrical engineering students, circuit designers, and anyone using PSpice for circuit simulation and analysis will benefit from this discussion.

JerrySinField
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1. Right now I am trying to recreate a problem from the book with pspice however, the math I have performed on the problem is not the same as what pspice is telling me.
2. Also how do I represent a voltage that has exponential decay with time (such as 5e^(-t))
3.here is the problem(finding Vy and Vx) http://i23.photobucket.com/albums/b400/Insanity_is_me/PSPICE/1B.jpg

and here is my attempt http://i23.photobucket.com/albums/b400/Insanity_is_me/PSPICE/attempt1b.jpg

ANY help would be greatly appreciated...by my math the voltages should be Vx=8v and Vy=10v

correct?
 
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JerrySinField said:
1. Right now I am trying to recreate a problem from the book with pspice however, the math I have performed on the problem is not the same as what pspice is telling me.



2. Also how do I represent a voltage that has exponential decay with time (such as 5e^(-t))



3.here is the problem(finding Vy and Vx) http://i23.photobucket.com/albums/b400/Insanity_is_me/PSPICE/1B.jpg

and here is my attempt http://i23.photobucket.com/albums/b400/Insanity_is_me/PSPICE/attempt1b.jpg

ANY help would be greatly appreciated...by my math the voltages should be Vx=8v and Vy=10v

correct?

Looks like the polarity of the Vx sensing is backwards in your PSpice schematic?
 

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