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

February 2004 ELEC 101 Lab 5 4

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

February 2004 ELEC 101 Lab 5 5

Lab 5A Schematic

February 2004 ELEC 101 Lab 5 6

Lab 05A Create New Simulation Profile

CL on PSpice CL on New Simulation Profile

February 2004 ELEC 101 Lab 5 7

Settings for New Simulation Profile

February 2004 ELEC 101 Lab 5 8

Select Desired Marker for Probe Output

February 2004 ELEC 101 Lab 5 9

Place VDB Voltage Probe at OUT

February 2004 ELEC 101 Lab 5 10

Run the Simulation

On the PSpice Toolbar, CL on the Run Button

February 2004 ELEC 101 Lab 5 11

Lab 05A Probe Output

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

February 2004 ELEC 101 Lab 5 12

Changing X Axis Grid

CL on Plot CL on Axis Settings

February 2004 ELEC 101 Lab 5 13

Modify X Grid Intervals

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

February 2004 ELEC 101 Lab 5 14

Revised Lab05A Probe Output

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

Lab 5B

Probe Output Modification Add Traces

February 2004 ELEC 101 Lab 5 16

Lab 5B Schematic

February 2004 ELEC 101 Lab 5 17

Probe Output for Transient Analysis

February 2004 ELEC 101 Lab 5 18

Change the Y Axis Range

February 2004 ELEC 101 Lab 5 19

Modified Probe Output

February 2004 ELEC 101 Lab 5 20

Add a Plot on the Top of the Current One

February 2004 ELEC 101 Lab 5 21

Probe Output with Additional Plot Window

February 2004 ELEC 101 Lab 5 22

Select Add Trace from the Trace Menu

February 2004 ELEC 101 Lab 5 23

Select the Waveform to Plot – VIN

February 2004 ELEC 101 Lab 5 24

Revised Probe Output

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

Lab 5C

Bias Point Calculation

February 2004 ELEC 101 Lab 5 26

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

February 2004 ELEC 101 Lab 5 27

Lab 05C Schematic

February 2004 ELEC 101 Lab 5 28

Lab 05C Add Net Alias

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

February 2004 ELEC 101 Lab 5 29

Lab 05C Schematic

February 2004 ELEC 101 Lab 5 30

Bias Point Selection

February 2004 ELEC 101 Lab 5 31

Lab 05C Schematic with Node Voltages

Lab 5A

Printed Output for Submission

February 2004 ELEC 101 Lab 5 33

Place VDB Voltage Probe at OUT

February 2004 ELEC 101 Lab 5 34

Revised Lab05A Probe Output

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

Lab 5B

Printed Output for Submission

February 2004 ELEC 101 Lab 5 36

Lab 5B Schematic

February 2004 ELEC 101 Lab 5 37

Revised Probe Output

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

Lab 5C

Printed Output for Submission

February 2004 ELEC 101 Lab 5 39

Lab 05C Output