Parametric Sweep — Maximum Power Transfer

In circuit design, we are sometimes concerned with how a circuit parameter affects performance. There are two ways to vary parameters in PSpice. The first is the DC Sweep, where we vary a parameter rather than a DC voltage. This method generates a single curve. The second is a Parametric Sweep that is run in conjunction with another analysis such as an AC Sweep, DC Sweep, or a Transient Analysis. The second method generates a family of curves. In this section we will demonstrate only the DC Parametric Sweep. Throughout this manual there will be examples using the Parametric Sweep in conjunction with the other analyses. 

We would like to vary the value of RL. To do this we need to define the value of RL as a parameter. Double-click on the text 

The value of resistor RL is now the value of the parameter RLj/Sl. We must now define the parameter and assign it a default value. Double-click the LEFT mouse button on the text PARAMETERS  

Double-click the LEFT mouse button on this text to define parameters. 

This attribute box is used to define parameters. We will define RLyal as a parameter and give it a default value of lk. Click the New Column button to create a new parameter  

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