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Proposed Design Flow

Proposed Design Flow. Analysis Get concepts organized Spreadsheet Graph what formulation means PS PICE Verify spreadsheet and formulation Build circuit What is missing in simulation?. Using E XCEL. Why use a spreadsheet? Get students into design Promote confidence in abilities

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Proposed Design Flow

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Presentation Transcript

  1. Proposed Design Flow • Analysis • Get concepts organized • Spreadsheet • Graph what formulation means • PSPICE • Verify spreadsheet and formulation • Build circuit • What is missing in simulation?

  2. Using EXCEL • Why use a spreadsheet? • Get students into design • Promote confidence in abilities • Why EXCEL? • Everybody's got OFFICE • Easy to use - it's a spreadsheet • Can program, if must - VBA

  3. Problems of Design • Confidence: algebra right? • Visualization: what’s going on? • PSPICE “magic”: what’s it doing? • Design?? Buried

  4. Fix • Derive equations • Put in EXCEL • Graph design tradeoffs • Verify with PSPICE • Immediate design verification

  5. Example • Design of CE Amp • Determine resistors • Meet specs

  6. Spreadsheet Set-up

  7. Data Input

  8. Equations as Algebra Formula Box using NAMED variables

  9. Tradeoff Plots Optimize design graphically

  10. Tradeoff Plots

  11. Change Input Immediate Update

  12. Paste Data into PSPICE Paste EXCEL PSPICE

  13. Verification using PSPICE

  14. Process • Is spreadsheet working? • No? - formulas wrong? • If formulas wrong - concept wrong? • Fix concept • Fix formula • Fix spreadsheet

  15. Advantages of EXCEL • Builds confidence in skills • Satisfaction – built a working tool • Interest through interactivity • Self-paced • Design up front and visual • Easy exploration of design

  16. Web Page for Details

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