OrCad Spice - plotting tangent line of curve

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SUMMARY

The discussion centers on plotting the tangent line of a curve in OrCad Spice, specifically evaluating the derivative at a specific point. The user is familiar with using the d() function to plot the derivative of the entire curve but seeks guidance on how to evaluate it at a particular point. A suggestion is made to place a marker at the desired point to obtain the numerical derivative, which serves as a practical workaround for the issue presented.

PREREQUISITES
  • Understanding of OrCad Spice simulation software
  • Familiarity with plotting functions and derivatives
  • Knowledge of using the d() function in OrCad Spice
  • Basic concepts of tangent lines and their graphical representation
NEXT STEPS
  • Research how to use markers in OrCad Spice for evaluating derivatives
  • Explore advanced plotting techniques in OrCad Spice
  • Learn about numerical methods for derivative evaluation
  • Investigate the use of the d() function in different contexts within OrCad Spice
USEFUL FOR

Electrical engineers, circuit designers, and anyone using OrCad Spice for simulation and analysis of curves and derivatives.

sayeo87
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Hi, I'm having trouble plotting the tangent line on a curve (or the derivative evaluated at a point) in spice. I know how to plot the derivative of the entire curve using the d() function, but I don't know how to evaluate it at a point. Any help is much appreciated!
 
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I don't use OrCad so I probably can't offer much help. But if you can plot the derivative of the entire curve. Why not just put a marker at the point you want. That will tell you the numerical derivative.
 

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