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Transistor Collecteur Commun Pdf Download

 
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MessagePosté le: Jeu 1 Sep - 19:49 (2016)    Sujet du message: Transistor Collecteur Commun Pdf Download Répondre en citant



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Transistor Collecteur Commun Pdf Download

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A,small,output,impedance,means,the,series,combination,of,the,original,voltage,source,and,the,voltage,follower,presents,a,Thvenin,voltage,source,with,a,lower,Thvenin,resistance,at,its,output,node;,that,is,,the,combination,of,voltage,source,with,voltage,follower,makes,a,more,ideal,voltage,source,than,the,original,one.,1),is,an,amplifier,with,full,series,negative,feedback.,Figure,,,5:,,,Small-signal,,,circuit,,,corresponding,,,to,,,Figure,,,3,,,using,,,the,,,hybrid-pi,,,model,,,for,,,the,,,bipolar,,,transistor,,,at,,,frequencies,,,low,,,enough,,,to,,,ignore,,,bipolar,,,device,,,capacitances,,,.,,,and,a,small,output,impedance,,so,it,can,drive,low-resistance,loads:.,Because,R,{displaystyle,R},generally,is,a,small,resistance,when,the,current,gain,β,{displaystyle,beta,},is,large,,R,{displaystyle,R},dominates,the,output,impedance,which,therefore,also,is,small.,1,,R,,E,,=,,1,,R,,L,,+,,1,,r,,O,,{displaystyle,,{frac,,{1}{R{mathrm,,{E},,}}}={frac,,{1}{R{mathrm,,{L},,}}}+{frac,,{1}{r{mathrm,,{O},,}}}},,R,,=,,R,,S,,+,,r,,π,,β,,+,,1,,,,.,,Using,,,Ohm's,,,law,,,various,,,currents,,,have,,,been,,,determined,,,and,,,these,,,results,,,are,,,shown,,,on,,,the,,,diagram.,,,Rsistance,,de,,sortie[modifier,,,,modifier,,le,,code].,,

Figure,4:,NPN,voltage,follower,with,current,source,biasing,suitable,for,integrated,circuits,.,Remarque,Les,segments,parallles,indiquent,que,les,composants,de,part,et,d'autre,sont,disposs,en,parallle.,Le,,montage,,,,collecteur,,commun,,possde,,un,,gain,,en,,tension,,proche,,de,,l'unit.,,Thus,,,the,,,two,,,voltages,,,are,,,subtracted,,,according,,,to,,,KVL,,,(the,,,subtractor,,,from,,,the,,,function,,,block,,,diagram,,,is,,,implemented,,,just,,,by,,,the,,,input,,,loop),,,and,,,their,,,difference,,,Vdiff,,,=,,,VIN,,,-,,,VOUT,,,is,,,applied,,,to,,,the,,,base-emitter,,,junction.,,,In,,class-A,,mode,,,sometimes,,an,,active,,current,,source,,is,,used,,instead,,of,,RE,,(Fig.,,A,,,v,,,=,,,v,,,o,,,u,,,t,,,v,,,i,,,n,,,≈,,,1,,,{displaystyle,,,{A{mathrm,,,{v},,,}}={v{mathrm,,,{out},,,},,,over,,,v{mathrm,,,{in},,,}}approx,,,1},,,.,,,Rsistance,,d'entre[modifier,,,,modifier,,le,,code].,,Collecting,the,terms,for,the,base,current,,the,base,current,is,found,as:.,Sommaire,,,1,,,Caractristiques,,,en,,,petits,,,signaux,,,1.1,,,Gain,,,en,,,tension,,,1.2,,,Rsistance,,,d'entre,,,1.3,,,Gain,,,en,,,courant,,,1.4,,,Rsistance,,,de,,,sortie,,,2,,,Voir,,,aussi,,,2.1,,,Liens,,,internes,,,.,,,As,,,a,,,result,,,,the,,,output,,,voltage,,,follows,,,the,,,input,,,voltage,,,variations,,,from,,,VBEO,,,up,,,to,,,V+;,,,hence,,,the,,,name,,,,emitter,,,follower.,,,

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