PPT-313 QUCS a Getting Started Guide - bethesignal.com

1 Confidential1 PPTPPT 313 qucs a Getting Started Guide313 qucs a Getting Started GuideEric BogatinEric BogatinSignal Integrity EvangelistSignal Integrity EvangelistTeledyne LeCroyTeledyne 2014 Copes can be downloaded from (PPT 313) Simulation: a blessing and a curse Practice Safe Simulation: Rule #9 Getting Started with qucs Five examples: Signals in the time and frequency domain A TDR Reflections, terminations and topologies An impedance analyzer A of Numerical Simulation ToolsSignal Analysis: (predicting signal waveforms based on numerical analysis): excel, Matlab, MathCAD, SI Studio;.Circuit Simulation: (SPICE: simulating voltage and currents based on circuit elements)Electromagnetic Simulation (modeling: converting geometry and materials into electrical models): HFSS, CST, Momentum, Simbeor, Sigrity, ;.123456789010 30 20 10 400freq, GHzDifferential Response, dBInput geometry and materialsSolve Maxwell s equations, output fields, currentsOutput S parameters, model Power of Simulation Explore design space with virtual prototypes Convert physical design into electrical models Explore performance of electrical models Answer.

2 It depends questions maximum data rate a channel will support selecting optimize capacitor values Faster time to an optimized design Learn Signal Integrity by doing : Quite Universal Circuit Simulator A SPICE like circuit simulator It is NOT a modeling tool You have to supply the circuit models and parameter values If you can draw the circuit (schematic) qucs will predict the voltages and currents in time or frequency The perfect introduction to Commercial Simulators qucs is open source (free) Free comes at a price What you can pay up for: more features, capability, models, elements, ease of use support automation, scripting faster time to correct answer If qucs is adequate for your application, you can t beat Modes Read it Hear it Write it Teach it Do it Measure real prototype Simulate virtual prototypeSignal and Power Integrity Danger of SimulationJust because there are a lot of digits or it goes to high frequency, doesn't mean it s an accurate prediction of the real Safe Instructions Open source: : under PPT 313 and ECEN 5224 courtesy copy of the software installation instructions some manuals five examples Process Open downloaded zip folder Review readme file Install qucs Move the _prj folder to the.

3 qucs directory Re start qucs Good to go #1: Spectrum of Signals Orientation zoom navigation parameters (press return to lock in values) simulation displays Rise time and Spectrum #2: a TDRV_reflected = V_TDR_10psec V_incidentV_incident = 1 #3: Terminations and #4: Impedance AnalyzerV(f) = I(f) x Z(f) #5: A Network Analyzer (and S parameter viewer) Steps Download qucs Download the 5 example projects Now you try it.