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diff --git a/Integrated_Electronics/Chapter12.ipynb b/Integrated_Electronics/Chapter12.ipynb
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+{
+ "metadata": {
+  "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 12 : MultiStage Amplifiers"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 12.1a, Page No 433"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "#initialisation of variables\n",
+      "Ry=1       #in K\n",
+      "Rg=1       #in M\n",
+      "Ri=1       #in K\n",
+      "hOE=1.0/40        #in K^-1\n",
+      "\n",
+      "#fL=1/(2*%pi*(ro+ri)*Cb)<=10\n",
+      "#Since ri=1M , ro<Ry=1K , then ro+ri=1M\n",
+      "\n",
+      "#Calculations\n",
+      "Cb=1/(2*math.pi*1*10)\n",
+      "\n",
+      "#Results\n",
+      "print(\"Minimum Value of coupling Capacitance for given FET = %.3f  \" %Cb)\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Minimum Value of coupling Capacitance for given FET = 0.016  \n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 12.1b, Page No 433"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "\n",
+      "#initialisation of variables\n",
+      "Ry=1#in K\n",
+      "Rg=1#in M\n",
+      "Ri=1#in K\n",
+      "hOE=1.0/40         #in K^-1\n",
+      "\n",
+      "#fL=1/(2*math.pi*(ro+ri)*Cb)<=10\n",
+      "\n",
+      "#Ro>1/hOE=40K  ro=Rc=1K.  Rb>Ri=1K   then  ri=1K\n",
+      "\n",
+      "#Calculations\n",
+      "ro=1000.0    #in ohm\n",
+      "ri=1000.0    #in ohm\n",
+      "Cb=1.0/(2*math.pi*10*(ro+ri))\n",
+      "\n",
+      "#Results\n",
+      "print(\"Coupling Capacitance for given transistor = %.2f v \" %(Cb*(10**6)))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Coupling Capacitance for given transistor = 7.96 v \n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file