Formulario Para Bjt, Jfet Y Mosfet

Adriel Jesus Martinez Jacinto 514-C  Formulario: Electrónica Analógica Tipo

Polarización

Diagrama

VCC

Fija

RC

RB

VCC

BJT

Emisor comun

RC

RB

RE

VCC

Divisor de voltaje

R1

RC

R2

RE

Ecuaciones Correspondientes IC = β IB VCC − VBE IB = RB IE = IC +IB VB = VBB -IB RB VC = VCE = VCC -IC RC VE = 0 VBE = 0.7 (no ideal) VBC =VB -VC VCE =VC -VE IC = β IB V C C − VBE IB = RB + (1 + β)RE IE = IC +IB VB = V-IB RB VC = V-IC RC VE = IE RE VBE = VB -VE V Isat = RC + RE VCE =V-IC (RC + RE ) a) metodo exacto R1 R2 RT H = R1 + R2 V R2 VT H = R1 + R2 VT H − VBE IB = RT H + (1 + β)RE IC = β IB IE = IC +IB VB = VT H -IB RT H VC = V-IC RC VE = I E RE VCE =V-IC (RC + RE ) V Isat = RC + RE b) metodo aproximado si βRE ≥ 10R2 IC ≈ IE VE IE = RE V R2 VB = R1 + R2 VC = V-IC RC VE = VB -VBE VCE = V-IC (RC + RE ) V Isat = RC + RE VBE = VB -VE

Tipo

Palarización

Diagrama V

RD Fija

VGG+ −

V

JFET

RD Autopolarización

RG

RS

V

Divisor de voltaje

R1

R2

RD

RS

Ecuaciones Correspondientes IG =0 VGS = -VGG VDS = VDD -ID RD VS =0 VGS = VG VDS = VD VGS 2 ID =IDSS (1) Vp

IG =0 ID = IS VD = VDD − ID RD VS = ID RS VDS = VDD − ID (RD + RS ) VGS = -ID RS VGS 2 ID =IDSS (1) Vp

IG =0 ID = IS VDD R2 VG = R1 + R2 VD = VDD − ID RD VS = ID RS VGS = VG − ID RS VDS = VDD − ID (RD + RS ) VGS 2 ID = IDSS (1) Vp

Tipo

Conguración

Diagrama V

RD Empobrecimiento

RS

RG

V

MOSFET

RD Enriquecimiento

RG

V

RD Enriquecimiento

R1

RS

Formulas VGS = -ID RS IG = 0 ID = IS VRS = IS RS VS = VRS VDS = VDD -ID (RD +RS ) VGS 2 ID = IDSS (1) Vp VDS = VD -VS VGS = VG -VS VDD = VD + ID RD IDencendido K= (V GSencendido − V GSth )2 ID = K(VGS - V th )2 VD = VDD - ID RD VGS = VDS VS = 0 VG = VD VGS = VG VGS = VDD - ID RD VD = VDD - ID RD IDencendido K= (V GSencendido − V GSth )2 ID = K(VGS - V th )2 VD = V G VGS = VG - VS VS = RS IS ID = IS VGS = VDD - ID (RD + RS )