Starting the application: Start -> OrCAD 10.0 Demo -> Capture CIS Demo


Two windows are typically used:

- schematic (Capture CIS - Demo Edition)

  - shows schematics, hierarchy
  - to switch back to your schematic: "Window"

- PSPICE simulation results (Schematic-xxx - PSPICE A/D Demo)


Chapters of interest:

- Chapter 2: how to get a project set up

  - be careful of file naming conventions 
  
    - no spaces
    - limited to 8 characters...alphanumeric

- Chapter 6: plotting signals versus time

- Chapter 7: gain vs. frequency analysis


Use icons to the right to place parts and route signals

- Place wire

  - ESC key to stop drawing lines
  - can click and drag features

- Place part

  - discrete elements (R, C, L), diodes, transistors
  - sources
  - may need to add libraries (<top directory>/tools/capture/library/pspice)

- Place ground

  - 0/source

- Right click to rotate elements


Operating point simulation:

- PSPICE -> New simulation profile
- analysis type: set to bias point
- run the simulation
- in the schematic, click the "V" button to display voltages, 
  "I" to display currents


Gain vs. frequency simulation:

- analysis type: set to AC sweep
- voltage source: VAC/SOURCE
- add markers to the schematic (so that they will be automatically drawn 
  after the simulation is completed)

- to draw the signal, select "Add Trace"

  - may need to turn off "Alias Names" option (to avoid confusion with signals)

- to delete a trace, select it at the bottom of the graph and hit the 
  "delete" key

- data plotted is magnitude 
 
  - sign change won't be shown unless you do a transient simulation
  - shows up as a phase change though

- phase -> VP() or IP()

  - plot in a different window (Plot -> Add Plot to Window)

  - to keep the plot frozen (so it doesn't revert back), in schematic 
    window, "Edit Simulation Settings" and set the button to 
    "Show...Last Plot" under the tab "Probe Window"

- other trace tips

  - marker ("Toggle Cursor")...use bottom waveform legend to select which 
    waveform to track


Transient simulation:

- analysis type: set to Time Domain

- voltage source: VSIN

  - option 1: change the voltage source

  - option 2: create another schematic (in the same hierarchy) and copy/paste 
    the circuit over...then replace the voltage source

    - don't forget to create a new simulation and switch back and forth 
      between the two when necessary (refer to the pull-down window in 
      the top left)


Voltage/Current markers

- used to mark of signals of interest
- plotted automatically after simulation is completed
- PSPICE -> Markers