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PSpice Subcircuit with adjustable property

oscar0226

Hi,

I am trying to build a subcircuit on pspice 16.6.

The subcircuit is a parallel-coupled open-circuited transmission line which consists of three ideal transmission line components and two resistors. The schematic is attached below.



However, I do not want to specify the property value of the three transmission lines such as TD and Z0 since I wish to implement a bandpass filter which cascade pairs of the subcircuit but with different values defined.

I would like to ask if there is any way I can implement this subcircuit with adjustable properties please?
Such that I can define the values of the subcircuit in the property list like the way defining the TD and Z0 values of an ideal transmission line but with TD1,2,3 and Z01,2,3 instead.

Thank you in advance.

  • Alok Tripathi
    This can be achieved by assigning property value to a variable. To do that- One should change the property value of these three Tlines and assign a variable to these value. Variable should be placed in curly braces. For example Zo value for these three transmission should be {myZo} instead 50. Now you need to assign a value to this variable. This can be done by placing a "PARAM" part from special library and adding new property (here it will be myZo) on this and assign a default value. If you need to wrap this complete thing inside the subckt you should just pass these variable in subckt declaration. You can find example of this in libraries shipped with PSpice, Ex: ana_misc.lib
  • ShaunRay

    You can simply do it by the assigning some property to the variable. For these Tlines, if you want to change the property value and want to assign a variable then must place your variable in curly braces.

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