Protel-Based Tutorial

With your existing Schematics3TM program you will:

1. Double click on the Schematics3TM icon to begin.
2. From the File-menu, select Open
3. Double-click on the design C:\drspice\examples\protel\ckt1.sch.
4. To generate a netlist, make sure the Window entitled CKT1.SCH is in the foreground. From the Tools menu, select Create Netlist...

Protel CKT1.CIR Schematic Capture

5. Now select the netlist type to be SPICE (Hierarchical)
6. Click OK and a netlist will be generated.
7. Double click on the DR. SPICE™ icon.
8. Select ckt1.cir from the C:\DRSPICE\EXAMPLES\PROTEL directory
9. Check the Interactive button.
10. Click OK

Within the editor window you will see this circuit:

CKT1.CIR Netlist

11. Next, from the Analysis Menu, select Run C:\drspice\examples\ckt1.cir. This will perform a simulation for each analysis statement found in the circuit file. In this example, the circuit file will perform one DC analysis based on the .DC statement and one transient analysis based on the .TRAN statement.

Analysis Menu

You are now prompted to select the waveforms you wish to see as the simulation progresses.

12. Select the v[out] vector to view by clicking once in the scrolling list (a second click will deselect the vector(s) to be shown).

“Select waveform to view during simulation” Dialog Box

NOTE: You may select more than one waveform to view at a time.

13. Click OK.

The following waveforms appear. Notice the effects of crossover distortion within the Transient simulation results.

Completed Transient Simulation (with crossover distortion)

14. To view the .DC sweep analysis results, bring the .DC window to the foreground by clicking on the title bar.

Completed DC Sweep Simulation (with crossover distortion)

Protel CKT2.SCH

15 Open the design CKT2.SCH from within Schematics3.

16 Repeat steps 3 through 14, but applied to CKT2.CIR The resulting waveforms are:

Completed Transient Simulation (with crossover distortion fixed)

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