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   "source": [
    "# Chapter 22: Power Electronics"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Example 22.1, Page 475"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
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     "text": [
      " Output Voltage, V = 12.0 V\n"
     ]
    }
   ],
   "source": [
    "import math\n",
    "#Initialization\n",
    "vz=4.7                     #voltage\n",
    "r3=1.222*10**3                #resistance in ohm\n",
    "r4=10**3                  #resistance in ohm\n",
    "\n",
    "\n",
    "#Calculation\n",
    "Vo=(vz+0.7)*((r3+r4)*r4**-1)         #output voltage\n",
    "\n",
    "\n",
    "#Result\n",
    "print' Output Voltage, V = %.1f V'%Vo\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Example 22.2, Page 476"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Power delivered to the load, P = 5 W\n",
      "Power dissipated in the output transistor, P = 10 W\n"
     ]
    }
   ],
   "source": [
    "import math\n",
    "#Initialization\n",
    "vo=10                     #voltage\n",
    "rl=5                      #resistance in ohm\n",
    "vi=15                      #voltage\n",
    "\n",
    "\n",
    "#Calculation\n",
    "io=vo*rl**-1                    #current in ampere\n",
    "po=vo*io**-1                      #power delivered to the load in watt\n",
    "pt=(vi-vo)*io                #power dissipated in the output transistor in watt\n",
    "\n",
    "\n",
    "\n",
    "#Result\n",
    "print'Power delivered to the load, P = %d W'%po\n",
    "print'Power dissipated in the output transistor, P = %d W'%pt\n"
   ]
  }
 ],
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