lab05

ELEC 101

Lab 5

February 2004 ELEC 101 Lab 5 2

Lab 05 Objectives •  The student will be able to

–  Open an existing project –  Create a new simulation profile –  Run a simulation and view the Probe output –  Modify the Probe ranges and grids for the X Axis and Y Axis –  Create a new project –  Create a new simulation for Bias Point Analysis –  Configure the schematic to display node voltages and branch currents

Lab 5A

Probe Window Output

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Lab 5A Requirements •  Open Circuit from Disk •  Create a New Simulation Profile for AC Sweep Analysis •  Place a ground referenced VDB Marker •  Run the simulation •  View Probe Output •  Change the X Axis grid markers to make readings more

accurate •  View Probe Output and make further modifications if desired

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Lab 5A Schematic

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Lab 05A Create New Simulation Profile

CL on PSpice CL on New Simulation Profile

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Settings for New Simulation Profile

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Select Desired Marker for Probe Output

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Place VDB Voltage Probe at OUT

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Run the Simulation

On the PSpice Toolbar, CL on the Run Button

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Lab 05A Probe Output

X-Axis is not a linear scale. Reading frequencies is not accurate

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Changing X Axis Grid

CL on Plot CL on Axis Settings

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Modify X Grid Intervals

CL on the X Grid Tab Turn off Automatic and select 10 for Minor

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Revised Lab05A Probe Output

The increased number of x axis markers makes the graph easier to read

Lab 5B

Probe Output Modification Add Traces

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Lab 5B Schematic

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Probe Output for Transient Analysis

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Change the Y Axis Range

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Modified Probe Output

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Add a Plot on the Top of the Current One

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Probe Output with Additional Plot Window

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Select Add Trace from the Trace Menu

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Select the Waveform to Plot – VIN

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Revised Probe Output

We can readily compare the relationship between the input waveform and the output current

Lab 5C

Bias Point Calculation

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Lab 05C Overview •  In some cases we wish to determine an operating point

–  this is called the Bias Point •  When Bias Point Simulation is performed in PSpice, it does

not generate a Probe Output because no component values are swept.

•  After running the simulation, close the probe Window and Select V or I from the toolbar to have Capture display all node voltages or all the branch currents.

•  The student will Place a Net Alias (special text inserted in the schematic) to identify nodes of particular interest

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Lab 05C Schematic

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Lab 05C Add Net Alias

CL on PSpice CL on Net Alias Type Net Alias text in the Alias box and CL on OK

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Lab 05C Schematic

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Bias Point Selection

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Lab 05C Schematic with Node Voltages

Lab 5A

Printed Output for Submission

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Place VDB Voltage Probe at OUT

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Revised Lab05A Probe Output

The increased number of x axis markers makes the graph easier to read

Lab 5B

Printed Output for Submission

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Lab 5B Schematic

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Revised Probe Output

We can readily compare the relationship between the input waveform and the output current

Lab 5C

Printed Output for Submission

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Lab 05C Output