CUPRINS. 3. Dispozitive multijoncńiune 3.1. Dioda PNPN 3.2. Tiristorul convenńional 3.3. Triacul 3.4. Tranzistorul unijoncńiune
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1 CUPRINS DISPOZITIVE ELECTRONICE ŞI ELECTRONICĂ ANALOGICĂ Cristian Bucur Introducere Cuprins Modulul A 1. Dioda semiconductoare 1.1. Caracteristici statice 1.2. Semiconductori intrinseci 1.3. Semiconductori extrinseci 1.4. DensităŃi de curent în semiconductori 1.5. JoncŃiunea p-n la echilibru termodinamic 1.6. Polarizarea joncńiunii P-N 1.7. Fenomene care modifică caracteristica statică 1.8. Circuite echivalente în regim static 1.9. Circuite echivalente în regim cvasistańionar Tipuri de diode semiconductoare cu joncńiune Principiul superpozińiei Circuite de redresare Stabilizatorul parametric 2. Tranzistori 2.1. Teoria elementară a TBP 2.2. Modele în regim static 2.3. Caracteristici statice ale TBP 2.4. Polarizarea TBP în zona activă de funcńionare 2.5. Regimul variabil al TBP 2.6. Caracteristici statice ale TEC 2.7. Polarizarea tranzistorului cu efect de câmp 2.8. Circuite echivalente ale TEC 3. Dispozitive multijoncńiune 3.1. Dioda PNPN 3.2. Tiristorul convenńional 3.3. Triacul 3.4. Tranzistorul unijoncńiune
2 3.5. Tiristorul MOS 3.6. Tiristorul GTO cu blocare pe poartă 3.7. Tiristorul Darlington 3.8. Tiristorul I.G.B.T Aria de diode controlată Teste de autoevaluare A Modulul B 4. Amplificatoare de semnal mic 4.1. Parametrii amplificatoarelor de semnal mic 4.2. Amplificatorul cu TBP in conexiune EC 4.3. Amplificatorul cu TBP in conexiune CC 4.4. Amplificatorul cu TBP in conexiune BC 4.5. PerformanŃele amplificatoarelor cu TBP 4.6. Etaje cu tranzistori compuşi 4.7. Structuri pentru creşterea impedanńei de ieşire 4.8. Structuri pentru creşterea impedanńei de intrare 5. Amplificatoare cu reacńie negativă 5.1. ConsideraŃii privind reacńia negativă (RN) 5.2. Topologii ale amplificatoarelor cu reacńie 5.3. RN cu eşantionare în nod şi comparare în nod 5.4. Metodica de rezolvare a amplificatoarelor cu RN 5.5. RN cu comparare buclă şi eşantionare buclă 5.6. RN cu eşantionare pe buclă şi comparare în nod 5.7. RN cu eşantionare în nod şi comparare pe bucla 5.8. PerformanŃe ale topologiilor de reacńie 6. Amplificatoare de putere 6.1. Amplificatoare de putere în clasă A 6.2. Amplificatoare de putere în clasă B 7. Amplificatoare integrate 7.1. Amplificatoare diferenńiale 7.2. Amplificatoare operańionale 7.3. Amplificatoare de transimpedanńă (Norton) 7.4. Amplificatoare de putere
3 7.5. Amplificatoare cu impedanńă de intrare foarte mare 7.6. Amplificatoare de instrumentańie 7.7. Amplificatoare de izolańie Teste de autoevaluare B Modulul C 8. Stabilizatoare liniare de tensiune continuă 8.1. Parametrii stabilizatoarelor (ST) 8.2. Topologia stabilizatoarelor liniare 8.3. ST în buclă deschisă cu element de comandă serie 8.4. ST în buclă deschisă cu element de reglaj paralel 8.5. ST în buclă închisă de reacńie, element de reglaj serie 8.6. ST cu tranzistori bipolari în buclă închisă de reacńie 8.7. Circuite pentru protecńia stabilizatoarelor 8.8. Stabilizatoare cu circuite integrate 9. Oscilatoare electronice 9.1. Principii de realizare a oscilatoarelor cu reacńie pozitivă 9.2. Oscilatoare armonice cu reacńie pozitivă de tipul RC 9.3. Oscilatoare armonice LC 10. Circuite electronice de putere Redresoare de putere Variatoare de tensiune alternativă Variatoare de tensiune continuă Invertoare Teste de autoevaluare C SoluŃiile testelor Bibliografia
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