lecture5_ee689_sparameter_channels

lecture5_ee689_sparameter_channels - Sam Palermo Analog&...

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Unformatted text preview: Sam Palermo Analog & Mixed-Signal Center Texas A&M University ECEN689: Special Topics in High-Speed Links Circuits and Systems Spring 2011 Lecture 5: S-Parameter Channel Models Announcements • Reference Material Posted on Website • TDR theory application note • S-parameter notes 2 Agenda • Network analyzer • S-parameters • Cascading S-parameter models • Full S-parameter channel model • Transient simulations • Impulse response generation • Eye diagrams • Inter-symbol interference • Majority of today’s material from Hall “Advanced Signal Integrity for High-Speed Digital Designs “ Chapter 9 3 Interconnect Modeling • Why do we need interconnect models? • Perform hand calculations and simulations (Spice, Matlab, etc…) • Locate performance bottlenecks and make design trade-offs • Model generation methods • Electromagnetic CAD tools • Actual system measurements • Measurement techniques • Time-Domain Reflectometer (TDR) • Network analyzer (frequency domain) 4 Network Analyzer 5 • Stimulates network with swept-frequency source • Measures network response amplitude and phase • Can measure transfer function, scattering matrices, impedance, … [ Dally ] Transfer Function & Impedance Measurements 6 [ Dally ] Scattering (S) Parameters • Why S Parameters?...
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lecture5_ee689_sparameter_channels - Sam Palermo Analog&...

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