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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter7 Receivers"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 7.3.1,Pg.no.227"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The freq tuning range is 1005000 Hz to 2055000 Hz\n",
+      "The tuning range ratio of oscillator is 2 ohm\n",
+      "The capacitor tuning range ratio of oscillator is 4\n",
+      "The tuning range ratio of RF−ckt is 2\n",
+      "The capacitor tuning range ratio of RF−ckt is 4\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "fs_min=550*10**3\n",
+    "fs_max=1600*10**3\n",
+    "IF=455*10**3 \n",
+    "#Determination of freq tuning ranges\n",
+    "fo_min=fs_min+IF\n",
+    "fo_max=fs_max+IF\n",
+    "print 'The freq tuning range is',fo_min,'Hz to',fo_max,'Hz'\n",
+    "Rf=(fo_max)/(fo_min)   #calculation of freq tuning range ratio\n",
+    "print 'The tuning range ratio of oscillator is',Rf,'ohm'\n",
+    "Rc=Rf**2               #calculation of capacitance tuning range ratio\n",
+    "print 'The capacitor tuning range ratio of oscillator is',Rc\n",
+    "#For RF section\n",
+    "Rf1=fs_max/fs_min;\n",
+    "print 'The tuning range ratio of RF−ckt is',Rf1\n",
+    "Rc1=Rf1**2\n",
+    "print 'The capacitor tuning range ratio of RF−ckt is',Rc1"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 7.4.1,Pg.no.230"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The Cs min is 84.0 *10^-12 F\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "Rco=8.463\n",
+    "Rfo=2.909\n",
+    "Rcs=4.182\n",
+    "Rfo=2.045\n",
+    "fo_max =2055.0*10**3\n",
+    "fo_min=1005.0*10**3\n",
+    "Cs_max=350.0\n",
+    "#For the RF section\n",
+    "Cs_min=Cs_max/Rcs\n",
+    "Cs_min=round(Cs_min,0)\n",
+    "print 'The Cs min is',Cs_min,'*10^-12','F'"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 7.6.1,Pg.no.234"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Image freq is 1930.0 Hz\n",
+      "Image rejection is -36.98\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "from math import sqrt\n",
+    "IF=465.0  #IF in KHz\n",
+    "fs=1000   #Tuning freq in KHz\n",
+    "Q=50.0    #Quality factor\n",
+    "#Oscillator freq fo is given as\n",
+    "fo=fs+IF;\n",
+    "#a) Image freq is given as\n",
+    "fi=fo+IF\n",
+    "print 'Image freq is',fi,'Hz'\n",
+    "y=fi/fs-fs/fi\n",
+    "#b) image rejection is given as\n",
+    "Ar=1/sqrt(1+(y*Q)**2)\n",
+    "Ar_dB=20*math.log10(Ar)\n",
+    "Ar_dB=round(Ar_dB,2)\n",
+    "print 'Image rejection is',Ar_dB"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.10"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}