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Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
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Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
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Deprecated function: The each() function is deprecated. This message will be suppressed on further calls en book_prev() (línea 775 de /home1/montes/public_html/drupal/modules/book/book.module).
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Deprecated function: implode(): Passing glue string after array is deprecated. Swap the parameters en drupal_get_feeds() (línea 394 de /home1/montes/public_html/drupal/includes/common.inc).

Ejercicio 4.13 Hambley (polarizacion automatica, cuatro resistencias)

Solapas principales

Enviado por pichu en Lun, 08/06/2012 - 13:14

Solucion:

a)

$\begin{displaymath}V_{CC}=15\,V\end{displaymath}$

$\begin{displaymath}R_{1}=100\, k\Omega\end{displaymath}$

$\begin{displaymath}R_{2}=50\,k\Omega\end{displaymath}$

$\begin{displaymath}R_{C}=1\, k\Omega\end{displaymath}$

$\begin{displaymath}R_{E}=1\,k\Omega\end{displaymath}$

$\begin{displaymath}V_{BE}=0.7\,V\end{displaymath}$

$\begin{displaymath}\beta=300\end{displaymath}$

$\begin{displaymath}V_{B}=V_{CC}\,\frac{R_{2}}{R_{1}+R_{2}}=15\,\frac{50\,10^3}{50\,10^3+100\,10^3}=5\,V\end{displaymath}$

$\begin{displaymath}R_{B}=\frac{R_{1}\,R_{2}}{R_{1}+R_{2}}=\frac{50\,10^3\cdot 100\,10^3}{50\,10^3+100\,10^3}=3.333\,k\Omega\end{displaymath}$

Suponemos que esta en zona activa el transistor.

$\begin{displaymath}V_{B}=R_{B}\,I_{B}+V_{BE}+R_{E}\,I_{E}=R_{B}\,I_{B}+V_{BE}+R_{E}\,(\beta+1)\,I_{B}\end{displaymath}$

$\begin{displaymath}5=3.33\, 10^{3} \,I_{B}+0.7+1\,10^3\,(300+1)\,I_{B}\end{displaymath}$

$\begin{displaymath}I_{B}=\frac{5-0.7}{3.33\,10^3+301\,10^3}=12.86\, \mu A\end{displaymath}$

$\begin{displaymath}I_{C}=\beta \, I_{B}=300\cdot 12.86\,10^{-6}=3.86\, mA\end{displaymath}$

$\begin{displaymath}V_{CC}=R_{C}\,I_{C}+V_{CE}+R_{E}\,I_{E}=R_{C}\,I_{C}+V_{CE}+R_{E}\,(\beta+1)\,I_{B}\end{displaymath}$

$\begin{displaymath}15=10^3\cdot 3.86\,10^{-3}+V_{CE}+10^3\cdot 301 \cdot 12.86\,10^{-6}\end{displaymath}$

$\begin{displaymath}V_{CE}=7.27\,V\end{displaymath}$

b)

$\begin{displaymath}\beta=100\end{displaymath}$

$\begin{displaymath}V_{B}=V_{CC}\,\frac{R_{2}}{R_{1}+R_{2}}=15\,\frac{50\,10^3}{50\,10^3+100\,10^3}=5\,V\end{displaymath}$

$\begin{displaymath}R_{B}=\frac{R_{1}\,R_{2}}{R_{1}+R_{2}}=\frac{50\,10^3\cdot 100\,10^3}{50\,10^3+100\,10^3}=3.333\,k\Omega\end{displaymath}$

Suponemos que esta en zona activa el transistor.

$\begin{displaymath}V_{B}=R_{B}\,I_{B}+V_{BE}+R_{E}\,I_{E}=R_{B}\,I_{B}+V_{BE}+R_{E}\,(\beta+1)\,I_{B}\end{displaymath}$

$\begin{displaymath}5=3.33\, 10^{3} \,I_{B}+0.7+1\,10^3\,(100+1)\,I_{B}\end{displaymath}$

$\begin{displaymath}I_{B}=\frac{5-0.7}{3.33\,10^3+101\,10^3}=32.01\, \mu A\end{displaymath}$

$\begin{displaymath}I_{C}=\beta \, I_{B}=100\cdot 32.01\,10^{-6}=3.2\, mA\end{displaymath}$

$\begin{displaymath}V_{CC}=R_{C}\,I_{C}+V_{CE}+R_{E}\,I_{E}=R_{C}\,I_{C}+V_{CE}+R_{E}\,(\beta+1)\,I_{B}\end{displaymath}$

$\begin{displaymath}15=10^3\cdot 3.2\,10^{-3}+V_{CE}+10^3\cdot 101 \cdot 32.01\,10^{-6}\end{displaymath}$

$\begin{displaymath}V_{CE}=8.57\,V\end{displaymath}$

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Ejercicio 4.13 Hambley (polarizacion automatica, cuatro resistencias)

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