Practicas de circuitos electronicos de interfase

Practica 1: Transistor Bipolar de Unión (de potencia).

Objetivo: Conocer las características de funcionamiento de un BJT implantado en un amplificador clase A.

El circuito a armar es el siguiente:

Luego de armarlo se tomaron datos experimentales, que se muestran en la tabla siguiente:

Amplificador clase A con 2N3055

|Vi(V) |VBE (V) |VCE(V) |IC(A)|IB(A) |
|0.5 |0.46 |29.12 |0 |0 |
|1 |0.81 |15.7 |1.37 |0.01 |
|1.5 |0.86 |0.237 |1.75 |0.05 |
|2 |0.86 |0.19 |1.75|0.1 |
|2.5 |0.86 |0.17 |1.75 |0.15 |
|3 |0.88 |0.16 |1.75 |0.2 |
|3.5 |0.88 |0.154 |1.75 |0.24 |
|4 |0.88 |0.151 |1.75 |0.29|
|4.5 |0.89 |0.148 |1.75 |0.34 |
|5 |0.89 |0.147 |1.75 |0.41 |
|5.5 |0.9 |0.146 |1.75 |0.44 |
|6 |0.9 |0.145 |1.75 |0.49 |
|6.5|0.91 |0.145 |1.75 |0.53 |
|7 |0.916 |0.145 |1.75 |0.59 |
|7.5 |0.922 |0.145 |1.75 |0.63 |
|8 |0.927 |0.147 |1.75 |0.68 |
|8.5|0.932 |0.147 |1.75 |0.71 |
|9 |0.936 |0.148 |1.75 |0.77 |
|9.5 |0.941 |0.149 |1.75 |0.82 |
|10 |0.946 |0.15 |1.75 |0.87 |
|10.5 |0.95|0.151 |1.75 |0.84 |
|11 |0.955 |0.152 |1.75 |0.97 |
|11.5 |0.96 |0.153 |1.75 |1.02 |
|12 |0.963 |0.155 |1.75 |1.07 |
|12.5 |0.967|0.154 |1.75 |1.13 |
|13 |0.972 |0.158 |1.75 |1.18 |
|13.5 |0.976 |0.159 |1.75 |1.22 |
|14 |0.98 |0.161 |1.75 |1.27 |
|14.5 |0.979 |0.163|1.75 |1.33 |
|15 |0.983 |0.163 |1.75 |1.37 |
|15.5 |0.986 |0.165 |1.75 |1.42 |
|16 |0.991 |0.167 |1.75 |1.47 |
|16.5 |0.995 |0.169 |1.75|1.52 |
|17 |0.999 |0.17 |1.75 |1.57 |
|17.5 |1.003 |0.173 |1.75 |1.62 |

[pic]
La corriente en el colector se estabiliza en un valor de 1.75 A, aproximadamente a 1.5 V de alimentación
[pic]
Los valores de corriente en el colector caen en...