Orcad

PSpice with Orcad 10
1. 2. 3. 4. 5. Creating Circuits Using PSpice Tutorial AC Analysis Step Response Dependent Sources Variable Phase VSin Source

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Creating Circuits using PSpice
Start  Orcad 10.5  Capture CIS Demo File  New  Project

Type in example1in the Name field. Select Analog or Mixed A/D. Click the Browse… button

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Select the h:\ directory andclick on Create Dir…

Enter PSpice in the Name: field. Click OK.

Double click on PSpice to select it. Click OK. That will take you back to the original New Project dialog box shown below.

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Click OK to create the new project.

Select Create a blank project. Click OK. This will open the schematic editor.

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Place Part New Simulation Profile Run PSpiceVoltage/Level Marker Enable Bias Voltage Display Enable Bias Currnet Display Place Wire Place Net Alias Place Ground

Schematic Editor with all the buttons used in this tutorial labeled. After the schematic editor opens, select the Place Part tool by clicking on the second button on the vertical toolbar on the right side shown above.

Select Add Library…

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On the screen selectSource.olb and click Open.

On this screen select a battery (VDC) then OK. Place the battery on the work area by clicking on the blank schematic page and click ESC to stop placing DC sources. Then double click on 0VDC to change the DC voltage. The following dialog box will be displayed:

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Change value to 10VDC and then click OK. Click on the Place Part button, then the AddLibrary… button.

Select analog.olb and press Open.

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Select the ANALOG library and select R from the Part List. Click OK. Place two resistors in the work space. To stop placing parts, press ESC or right click an item and select “End Mode”. To rotate an part, select the part and press „r‟ or right click and select rotate from the drop down menu. If you need to delete a part, select thepart and press the Delete key. To connect the items in the circuit, select the Place Wire tool by clicking on the third button from the top on the vertical toolbar on the right side. Drag the mouse between the terminals of your placed parts to connect them.

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In order for PSpice to simulate your circuit, it must have a “zero” node for a ground. To add this ground, select thePlace Ground tool by clicking on the 9th button from the top on the vertical toolbar on the right side. The following dialog box will appear.

Select the SOURCE Library and the 0 Symbol followed by OK. Place the ground for your circuit by clicking on the schematic page and connect it with the Place Wire tool. Your diagram should look like this:

To change the value for an item, double click thevalue you want to change and enter the value you want on the dialog box that appears. Double click on the 1k value of the horizontally placed resistor and change the Value to 4k as shown below.

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It is important to name the nodes you want to plot in PSpice so you can find them easily. To name a node, select the Place Net Alias tool and the following dialog box appears. Change theAlias to Vout and click OK.

Then place the alias on the desired node for Vout (i.e. the junction of the 2 resistors). Next, configure the simulation by clicking the New Simulation Profile button on the top toolbar. Enter the Name tran as shown below.

Click Create and the following dialog box will appear.

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Click OK to accept the default settings of the Time Domain(transient) analysis. From the top menu select PSpice  Create Netlist . This is only necessary so that you can add the Voltage Level Marker. Click on the Voltage/Level Marker button to add a marker to the Vout node by clicking on it as shown below.

Click the Run PSpice button and the PSpice Analysis results will appear as shown below.

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This automatically plots nodes with Voltage...