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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:f3203bf7786c39de89c39055969e5210f4d6ecee2a5994233cbc07ff50437a9b"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter12:Sinusoidal Oscillators"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example E1 - Pg 423"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Calculate frequency of oscillations\n",
+      "#given\n",
+      "import math\n",
+      "L=55.*10.**-6.;#H\n",
+      "C=300.*10.**-12.;#F\n",
+      "fo=1./(2.*math.pi*math.sqrt(L*C));\n",
+      "print '%s %.f %s' %(\"The frequency of oscillations =\",fo/1000,\"kHz\\n\");\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The frequency of oscillations = 1239 kHz\n",
+        "\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example E2 - Pg 425"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Calculate frequency of oscillations and feedback factor and voltage gain\n",
+      "#given\n",
+      "def  prll(r1,r2):\n",
+      "\tz=r1*r2/(r1+r2)#\n",
+      "\treturn z\n",
+      "import math\n",
+      "C1=0.001*10.**-6.;#F\n",
+      "C2=0.01*10.**-6.;#F\n",
+      "L=15.*10.**-6.;#H\n",
+      "C=prll(C1,C2);\n",
+      "fo=1./(2.*math.pi*math.sqrt(L*C));\n",
+      "print '%s %.2f %s' %(\"The frequency of oscillations =\",fo/10**6,\"MHz\\n\");\n",
+      "B=C1/C2;\n",
+      "Amin=1./B;\n",
+      "print '%s %.1f %s' %(\"The feedback factor of the circuit =\",B,\"\\n\");\n",
+      "print '%s %.f' %(\"The circuit needs a minimum voltage gain of\",Amin);\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The frequency of oscillations = 1.36 MHz\n",
+        "\n",
+        "The feedback factor of the circuit = 0.1 \n",
+        "\n",
+        "The circuit needs a minimum voltage gain of 10\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example E3 - Pg 432"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Calculate frequency of oscillations\n",
+      "#given\n",
+      "import math\n",
+      "R=10.*10.**3.;#ohm\n",
+      "C=0.01*10.**-6.;#F\n",
+      "fo=1./(2.*math.pi*R*C*math.sqrt(6.));\n",
+      "print '%s %.1f %s' %(\"The frequency of oscillations =\",fo,\"Hz\\n\");\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The frequency of oscillations = 649.7 Hz\n",
+        "\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example E4 - Pg 432"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Calculate frequency of oscillations\n",
+      "#given\n",
+      "import math\n",
+      "R=22.*10.**3.;#ohm\n",
+      "C=100.*10.**-12.;#F\n",
+      "fo=1./(2.*math.pi*R*C);\n",
+      "print '%s %.2f %s' %(\"The frequency of oscillations =\",fo/1000,\"KHz\\n\");\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The frequency of oscillations = 72.34 KHz\n",
+        "\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example E5 - Pg 434"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Determine the series and parallel resonant frequencies\n",
+      "#given\n",
+      "def  prll(r1,r2):\n",
+      "\tz=r1*r2/(r1+r2)#\n",
+      "\treturn z\n",
+      "import math\n",
+      "L=3.;#H\n",
+      "Cm=10.*10.**-12.;#F\n",
+      "Cs=0.05*10.**-12.;#F\n",
+      "fs=1./(2.*math.pi*math.sqrt(L*Cs));\n",
+      "print '%s %.f %s' %(\"The series resonant frequency =\",fs/1000,\"kHz\\n\");\n",
+      "\n",
+      "Cp=prll(Cm,Cs);\n",
+      "fp=1./(2.*math.pi*math.sqrt(L*Cp));\n",
+      "print '%s %.f %s' %(\"The parallel resonant frequency =\",fp/1000,\"kHz\");\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The series resonant frequency = 411 kHz\n",
+        "\n",
+        "The parallel resonant frequency = 412 kHz\n"
+       ]
+      }
+     ],
+     "prompt_number": 5
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file