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diff --git a/Electronic_Circuits_by_M._H._Tooley/Chapter8_2.ipynb b/Electronic_Circuits_by_M._H._Tooley/Chapter8_2.ipynb
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@@ -0,0 +1,186 @@
+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:69bad2cc1b97411ab194c6989d24ce9e98f48b912e29dd4ff77d5d659094fdfe"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter8-Operational Amplifiers"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex1-pg158"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "##Ex:8.1\n",
+      "import math\n",
+      "V_out=2.;\n",
+      "V_in=400.*10**-6;\n",
+      "A_v=V_out/V_in;\n",
+      "A_v_dB=math.ceil (20.*(math.log (A_v)/math.log (10.)));\n",
+      "print'%s %.2f %s'%(\"open loop voltage gain = \",A_v_dB,\" dB\"); \n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "open loop voltage gain =  74.00  dB\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex2-pg159"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "##Ex:8.2\n",
+      "import math\n",
+      "V_in=5.*10**-3;\n",
+      "R_in=2.*10**6;\n",
+      "I_in=V_in/R_in;\n",
+      "print'%s %.2e %s'%(\"Input current = \",I_in,\" A\"); \n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Input current =  2.50e-09  A\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex3-pg160"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "##Ex:8.3\n",
+      "import math\n",
+      "V_out=10.;\n",
+      "t=4.;\n",
+      "SR=V_out/t;\n",
+      "print'%s %.2f %s'%(\"Slew rate = \",SR,\" V/us\"); \n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Slew rate =  2.50  V/us\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex4-pg160"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "##Ex:8.4\n",
+      "import math\n",
+      "V_out=2.;\n",
+      "SR=15.;##in V/us\n",
+      "t=V_out/SR;\n",
+      "print'%s %.2f %s'%(\"Time taken = \",t,\" us\"); \n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Time taken =  0.13  us\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex6-pg164"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "##Ex:8.6\n",
+      "import math\n",
+      "R_in=10000.;\n",
+      "f1=250.;\n",
+      "f2=15000.;\n",
+      "C_in=0.159/(f1*R_in);\n",
+      "C_f=0.159/(f2*R_in);\n",
+      "print'%s %.2e %s'%(\"C_f = \",C_f,\" F\"); \n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "C_f =  1.06e-09  F\n"
+       ]
+      }
+     ],
+     "prompt_number": 5
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file