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COMPONENTES ELECTRONICOS Examenes 2005 Examenes 2006 Examenes 2007
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Cuestion 5 (Amplificacion, ganancia, intensidad, potencia)

Image 2005JunAC1
Solucion:


\begin{displaymath}R_{i}=100\,k\Omega\end{displaymath}


\begin{displaymath}R_{o}=4\,\Omega\end{displaymath}


\begin{displaymath}A_{vo}=100\end{displaymath}


\begin{displaymath}R_{L}=4\,\Omega\end{displaymath}




\begin{displaymath}A_{i}=A_{v}\,\frac{R_{i}}{R_{L}}\end{displaymath}


\begin{displaymath}A_{v}=A_{vo}\,\frac{R_{L}}{R_{o}+R_{L}}=100\,\frac{4}{4+4}=50\end{displaymath}


\begin{displaymath}A_{i}=50\,\frac{100\,10^3}{4}=1.25\,10^6\end{displaymath}




\begin{displaymath}A_{p}=A_{v}\,A_{i}=1.25\,10^6\cdot 50=62.5\,10^6\end{displaymath}

cajael