mixed_signal_notes_set_1

mixed_signal_notes_set_1 - ECE194J /594J notes, M. Rodwell,...

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ECE194J /594J notes, M. Rodwell, copyrighted 2011 Mixed-Signal IC Design Notes set 1: Quick Summary of Device Models Mark Rodwell University of California, Santa Barbara [email protected] 805-893-3244, 805-893-3262 fax
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ECE194J /594J notes, M. Rodwell, copyrighted 2011 Background / Review notes. online ECE145a the refer to please required, is detail greater If parameters port - 2 models ct Interconne models Transistor n. informatio key review Quickly ECE145A in covered was material This
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Transmission Lines
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ECE194J /594J notes, M. Rodwell, copyrighted 2011 Transmission Lines for On-Wafer Wiring H W microstrip line 0V +V geometry voltages currents I I ADS use how to learn : ips relationsh e approximat are These light. of speed the is where : velocity n propagatio and 377 where : impedance stic characteri 0 0 c c v W H H Z r r o ε η = +
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ECE194J /594J notes, M. Rodwell, copyrighted 2011 Transmission Lines: Waves, Voltage, Current Ldz L Z Cdz gen V s Z velocity n propagatio / 1 and impedance stic characteri / where currents wave reverse and forward ) / ( ) / ( ) , ( voltages wave reverse and forward ) / ( ) / ( ) , ( LC v C L Z Z v z t V Z v z t V t z I v z t V v z t V t z V o o o = = + = + + = + +
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ECE194J /594J notes, M. Rodwell, copyrighted 2011 Reflections ( ) ( ) ( ) ( ) t coefficien ion transmiss source and t coefficien reflection source 1 1 where : line of beginning At t coefficien reflection load 1 1 where : line of end At s o o s o s o s s gen s s o l o l l l Z Z Z T Z Z Z Z V T V V Z Z Z Z V V + = + = Γ + Γ = + = Γ Γ = + + L Z gen V s Z
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ECE194J /594J notes, M. Rodwell, copyrighted 2011 Pulse Reflections on Transmission Lines
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ECE194J /594J notes, M. Rodwell, copyrighted 2011 Relating Lumped and Distributed Circuits 0 0 / , Z C Z L τ = = model e Approximat charging. circuit RC inductor neglect ) || ( ) /( << + C R R R R L s L s L
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ECE194J /594J notes, M. Rodwell, copyrighted 2011 Short Tramission Lines Can Be Modeled as L's and C's 0 0 / , Z C Z L τ = = inductor an ely approximat . small , large : line - High 0 C L Z capacitor. a ely approximat . small , large : line - Low 0 L C Z
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ECE194J /594J notes, M. Rodwell, copyrighted 2011 Skin effect loss periphery. carrying - current effective the is P where , ) 1 ( 1 length unit per resistance series added has Line ty. conductivi the is where 2 / depth skin one by conductor the penetrates Current δσ σ ωµσ δ j P Z surface + = = H W ~W +2H
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package resonance and grounding
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ECE194J /594J notes, M. Rodwell, copyrighted 2011 What is Ground Bounce ? ADC digital sections input buffer ground return currents L ground V in ground bounce noise "Ground" simply means a reference potential shared between many circuit paths.
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This note was uploaded on 12/29/2011 for the course ECE 594A taught by Professor Rodwell during the Fall '09 term at UCSB.

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mixed_signal_notes_set_1 - ECE194J /594J notes, M. Rodwell,...

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