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+{
+ "metadata": {
+  "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 9: Uninjunction Transistor"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "example 9.1, Page No.310"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Stand of voltage and peak point Voltage\n",
+      "import math\n",
+      "#variable declaration\n",
+      "\n",
+      "VBB=20                       #in volt\n",
+      "VB=0.7                       #in volt(For Si)\n",
+      "ETA=0.6                      #intrinsic stand off ratio\n",
+      "\n",
+      "#Part (i)\n",
+      "#calculations\n",
+      "StandOffVoltage=ETA*VBB;     #in volt\n",
+      "\n",
+      "#Resuly\n",
+      "print(\"\\n(i)\\nStand Off Voltage in volts :%.0f\"%StandOffVoltage)\n",
+      "\n",
+      "#Part (ii)\n",
+      "#calculations\n",
+      "VP=ETA*VBB+VB               #in volts\n",
+      "\n",
+      "#Result\n",
+      "print(\"\\n(ii)\\nPeak point Voltage in volts : %.1f\"%VP)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "\n",
+        "(i)\n",
+        "Stand Off Voltage in volts :12\n",
+        "\n",
+        "(ii)\n",
+        "Peak point Voltage in volts : 12.7\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "example 9.2, Page no. 310"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Time period of sawtooth waveform\n",
+      "import math\n",
+      "\n",
+      "#variable declaration\n",
+      "VP=10.0                                   #in volt\n",
+      "R=100.0                                   #in Kohm\n",
+      "C=1000.0                                  #in pF\n",
+      "VBB=20.0                                  #in Volts\n",
+      "ETA=VP/VBB                                #intrinsic stand off ratio\n",
+      "\n",
+      "#calculations\n",
+      "T=R*10**3*C*10**-12*math.log(1/(1-ETA))   #in sec\n",
+      "\n",
+      "#Resullt\n",
+      "print(\"Time period of sawtooth wave in micro seconds : %.2f\"%(T*10**6))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Time period of sawtooth wave in micro seconds : 69.31\n"
+       ]
+      }
+     ],
+     "prompt_number": 8
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "example 9.3, Page No.311"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Resistances RB1 and RB2\n",
+      "import math\n",
+      "#variable declaration\n",
+      "RBB=10                                #in Kohm\n",
+      "ETA=0.6                               #intrinsic stand off ratio\n",
+      "\n",
+      "#calculation\n",
+      "RB1=ETA*RBB                           #in Kohm\n",
+      "RB2=RBB-RB1                           #in Kohm\n",
+      "\n",
+      "#Result\n",
+      "print(\"Resistance RB1 in Kohm :%.0f\"%RB1)\n",
+      "print(\"Resistance RB2 in Kohm :%.0f\"%RB2)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Resistance RB1 in Kohm :6\n",
+        "Resistance RB2 in Kohm :4\n"
+       ]
+      }
+     ],
+     "prompt_number": 10
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file