two_port_parameters

two_port_parameters - class notes, M. Rodwell, copyrighted...

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class notes, M. Rodwell, copyrighted 2009 ECE 145A / 218 C, notes set 7: wo ort Parameters Two Port Parameters Mark Rodwell University of California, Santa Barbara rodwell@ece.ucsb.edu 805-893-3244, 805-893-3262 fax
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class notes, M. Rodwell, copyrighted 2009 Device Descriptions for Circuit Design odel rcuit quivalent equency ias C pon ependence cludes based physically model circuit - Equivalent errors some hence , simplified necessary : ess weakn dependence size device includes often frequency & bias DC upon dependence includes Port Model - 2 p y frequency each point, bias each for model one need data tabular of matrix data simulation E/M (b) and data measured (a) both for medium required. sets data huge eory. network th general for useful also methods port - 2
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class notes, M. Rodwell, copyrighted 2009 Recall: HBT equivalent-circuit model C cbx ) exp( c mo m j g g ωτ = C cbi R bb BC R c e g R / β = c b f τ + τ = τ R be V g m V e -j c m be E R ex C je C be,diff =g m τ f
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class notes, M. Rodwell, copyrighted 2009 Recall: FET Equivalent Circuit Model C gd R g R i g m V g’s’ G ds R d G D SDSDSDS G C gs V g’s’ C C db G W g R s S sb () ( ) ( ) s th gs g eq g eff eq m NW L C V V NW T NW v T g ~ or ~ ε μ end g s g R W R + 2 ~ ρ C gd R g R i g m V g’s’ G ds G D g ds g gd g g eq gs NW G NW C T g s g d g NW R NW R N N L / 1 / 1 2 12 C gs V g’s’ C db m i g R / 1 ~ g db g sb NW C NW C R s S C sb
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class notes, M. Rodwell, copyrighted 2009 2-Port Descriptions ( 3-Wire Network or Device) bcirc it ement assi e r transist ntain ight o subcircuit a element, passive a or, a transist : contain might Box d ariables he late ics aracteri erminal he freedom. of degrees 2 are There . and , , , variables the relate stics characteri terminal The 2 1 2 1 I I V V , variables* dependent * the , variables two remaining The . * s t variable independen * the as set be can variables Any two s. t variable independen the of functions as written be then can
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class notes, M. Rodwell, copyrighted 2009 Two-Port Parameters: Represent Device or Network
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class notes, M. Rodwell, copyrighted 2009 Admittance Parameters : n descriptio domain - Frequency { } { } etc. , Re ) ( , Re ) ( 1 1 1 1 t j t j e I t i e V t v ω = = ) ( ) ( ) ( ) ( 2 1 j V j Y j Y j I = ) ( ) ( ) ( ) ( 2 1 22 21 12 11 2 1 j V j Y j Y j I plicit aken ias C voltages. of functions as written are Currents implicit. as taken is bias DC
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class notes, M. Rodwell, copyrighted 2009 Admittance Parameters Example: Simple FET Model = 1 2 1 12 11 1 V V Y Y Y Y I I
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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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two_port_parameters - class notes, M. Rodwell, copyrighted...

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