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ELEC 101
Lab 5
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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
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Lab 5A
Probe Window Output
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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
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February 2004 ELEC 101 Lab 5 5
Lab 5A Schematic
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February 2004 ELEC 101 Lab 5 6
Lab 05A Create New Simulation Profile
CL on PSpice CL on New Simulation Profile
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February 2004 ELEC 101 Lab 5 7
Settings for New Simulation Profile
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February 2004 ELEC 101 Lab 5 8
Select Desired Marker for Probe Output
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February 2004 ELEC 101 Lab 5 9
Place VDB Voltage Probe at OUT
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February 2004 ELEC 101 Lab 5 10
Run the Simulation
On the PSpice Toolbar, CL on the Run Button
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February 2004 ELEC 101 Lab 5 11
Lab 05A Probe Output
X-Axis is not a linear scale. Reading frequencies is not accurate
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February 2004 ELEC 101 Lab 5 12
Changing X Axis Grid
CL on Plot CL on Axis Settings
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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
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February 2004 ELEC 101 Lab 5 14
Revised Lab05A Probe Output
The increased number of x axis markers makes the graph easier to read
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Lab 5B
Probe Output Modification Add Traces
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February 2004 ELEC 101 Lab 5 16
Lab 5B Schematic
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February 2004 ELEC 101 Lab 5 17
Probe Output for Transient Analysis
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February 2004 ELEC 101 Lab 5 18
Change the Y Axis Range
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February 2004 ELEC 101 Lab 5 19
Modified Probe Output
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February 2004 ELEC 101 Lab 5 20
Add a Plot on the Top of the Current One
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February 2004 ELEC 101 Lab 5 21
Probe Output with Additional Plot Window
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February 2004 ELEC 101 Lab 5 22
Select Add Trace from the Trace Menu
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February 2004 ELEC 101 Lab 5 23
Select the Waveform to Plot – VIN
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February 2004 ELEC 101 Lab 5 24
Revised Probe Output
We can readily compare the relationship between the input waveform and the output current
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Lab 5C
Bias Point Calculation
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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
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February 2004 ELEC 101 Lab 5 27
Lab 05C Schematic
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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
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February 2004 ELEC 101 Lab 5 29
Lab 05C Schematic
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February 2004 ELEC 101 Lab 5 30
Bias Point Selection
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February 2004 ELEC 101 Lab 5 31
Lab 05C Schematic with Node Voltages
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Lab 5A
Printed Output for Submission
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February 2004 ELEC 101 Lab 5 33
Place VDB Voltage Probe at OUT
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February 2004 ELEC 101 Lab 5 34
Revised Lab05A Probe Output
The increased number of x axis markers makes the graph easier to read
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Lab 5B
Printed Output for Submission
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February 2004 ELEC 101 Lab 5 36
Lab 5B Schematic
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February 2004 ELEC 101 Lab 5 37
Revised Probe Output
We can readily compare the relationship between the input waveform and the output current
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Lab 5C
Printed Output for Submission
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February 2004 ELEC 101 Lab 5 39
Lab 05C Output