Rg = ∞ I1 = 0

(Rg = resistencia del generador)

 

Las siguientes fórmulas se utilizan para determinar las magnitudes características en las tres configuraciones de transistores.

 

Fórmula 1

Resistencia de salida:

U2 / I2 = 1 / h22

 

Cuando las gran cantidad se dan en la tabla 1.

 

Fórmula 2

Conductividad de salida:

I2 / U2 = h22

 

Cuando las magnitudes se dan en la tabla 1.

 

Fórmula 3

Realimentación de tensión:

U1 / U2 = h12

 

Cuando las magnitudes se definen en la tabla 1.

 

Fórmula 4

Resistencia inversa de transferencia:

U1 / I2 = h12 / h22

 

Cuando la grandeza se define en la tabla 1.

 

Tabla 1 - Símbolos literales y abreviaturas para Transistores - (Aplicados a las fórmulas de 1 a 4)

 

Símbolo Término
Det h Determinante h
Gi Ganancia de corriente
Gv Ganancia de tensión
Gp Ganancia de potencia
h11 Impedancia de entrada con salida en corto
h12 Factor de amplificación de tensión inversa en circuito abierto
h21 Factor de amplificación directa en corto
h22 Admitancia de salida con salida abierta
I1 Corriente de entrada
I2 Corriente de salida
Ib Corriente de base
Ic Corriente de coletor
Ie Corriente de Emisor
RG Resistencia del generador
RL Resistencia de carga
U1 Tensión de entrada
U2 Tensión de salida
Ubc Tensión entre base y colector
Ube Tensión entre base y emisor
Uce Tensión entre colector y emisor

 

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