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+{
+ "metadata": {
+  "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter : 14 - Phase-Locked Loops (PLL)"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 14.1 : Page No - 525\n"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "from numpy import sqrt, pi\n",
+      "#Given data\n",
+      "R_T = 10 # in k ohm\n",
+      "R_T = R_T * 10**3 # in ohm\n",
+      "C_T = 0.005 # in \u00b5F\n",
+      "C_T = C_T * 10**-6 # in F\n",
+      "C=10*10**-6 # in F\n",
+      "f_out = 0.25/(R_T*C_T) # in Hz\n",
+      "print \"Free Running frequency =\",int(f_out*10**-3),\"kHz\" \n",
+      "# Part (ii)\n",
+      "V=20 # in V\n",
+      "f_L= 8*f_out/V # in Hz\n",
+      "print \"Lock range in kHz = \u00b1\",int(f_L*10**-3),\"kHz\"\n",
+      "# Part (iii)\n",
+      "f_C= sqrt(f_L/(2*pi*3.6*10**3*C)) # in Hz\n",
+      "print \"Capture range = \u00b1\",int(f_C),\"Hz\""
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Free Running frequency = 5 kHz\n",
+        "Lock range in kHz = \u00b1 2 kHz\n",
+        "Capture range = \u00b1 94 Hz\n"
+       ]
+      }
+     ],
+     "prompt_number": 5
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 14.2 : Page No - 532\n"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "from math import log\n",
+      "#Given data\n",
+      "f_out_max = 200 # in kHz\n",
+      "f_out_min = 4 # in Hz\n",
+      "f_CLK = 2.2*f_out_max # in kHz\n",
+      "print \"Frequency of reference oscillation = %0.f kHz\" %f_CLK \n",
+      "f_CLK= f_CLK*10**3 # in Hz\n",
+      "# Formula f_out_min= f_CLK/2**n\n",
+      "n=log(f_CLK/f_out_min)/log(2) \n",
+      "print \"The number of bits required in the phase accumulator = %0.f\" %round(n)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Frequency of reference oscillation = 440 kHz\n",
+        "The number of bits required in the phase accumulator = 17\n"
+       ]
+      }
+     ],
+     "prompt_number": 6
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
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