XML
Busqueda personalizada
COMPONENTES ELECTRONICOS Examenes 2005 Examenes 2006 Examenes 2007
Examenes 2008 Examenes 2009    

 

 

 

Cuestion 5 (Amplificacion, ganancia de potencia)

Image 2005JunDC5
Solucion:

\begin{displaymath}U_{e}=5\,\mu V_{rms}\end{displaymath}


\begin{displaymath}U_{e}=5\, V_{rms}\end{displaymath}


\begin{displaymath}R_{i}=75\,\Omega\end{displaymath}


\begin{displaymath}R_{L}=8\,\Omega\end{displaymath}




\begin{displaymath}G=(A_{v})^2\,\frac{R_{i}}{R_{L}}\end{displaymath}


\begin{displaymath}A_{v}=\frac{U_{o}}{U_{e}}=\frac{5}{5\,10^{-6}}=1\,10^6\end{displaymath}


\begin{displaymath}G=(A_{v})^2\,\frac{R_{i}}{R_{L}}=(1\,10^6)^2\,\frac{75}{8}=9.37\,10^{12}\approx 9.38\,10^{12}\end{displaymath}




cajael