Added(A)/Deleted(D) following books

 A  Electronic_Communication_by_D._Roddy/Chapter10_Angle_Modulation.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter11_Pulse_Modulation.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter12_Digital_Communications.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter13_Transmission_Lines_And_Cables.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter14_WaveGuides.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter15_Radio_Wave_Propogation.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter16_Antennas.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter17_Telephone_Systems.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter18_Fascimile_and_Television.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter19_Satellite_Communications.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter1_Passive_Circuits.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter20_Fibre_Optic_Communication.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter2_Waveform_Spectra.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter4_Noise.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter5_Tuned_Small_Signal_Amplifiers,_Mixers_and_Active_Filters.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter6_Oscillators.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter7_Receivers.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter8_Amplitude_Modulation.ipynb
A  Electronic_Communication_by_D._Roddy/Chapter9_Single_Sideband_Modulation.ipynb
A  Electronic_Communication_by_D._Roddy/screenshots/1.png
A  Electronic_Communication_by_D._Roddy/screenshots/12.png
A  Electronic_Communication_by_D._Roddy/screenshots/9.png
A  Thyristors_Theory_And_Applications_by_R._K._Sugandhi_And_K._K._Sugandhi/Chapter11_Control_of_DC_Motors_1.ipynb
A  Thyristors_Theory_And_Applications_by_R._K._Sugandhi_And_K._K._Sugandhi/Chapter12_Controllers_and_Their_Optimisation_1.ipynb
A  Thyristors_Theory_And_Applications_by_R._K._Sugandhi_And_K._K._Sugandhi/Chapter13_Choppers_and_Transportation_system_Application_1.ipynb
A  Thyristors_Theory_And_Applications_by_R._K._Sugandhi_And_K._K._Sugandhi/Chapter15_The_AC_motor_control_1.ipynb
A  Thyristors_Theory_And_Applications_by_R._K._Sugandhi_And_K._K._Sugandhi/Chapter16_Faults_and_Protection_1.ipynb
A  Thyristors_Theory_And_Applications_by_R._K._Sugandhi_And_K._K._Sugandhi/Chapter3_Fabrication_and_Thermal_characteristics_1.ipynb
A  Thyristors_Theory_And_Applications_by_R._K._Sugandhi_And_K._K._Sugandhi/Chapter4_Series_and_Parallel_Connection_of_Thyristors_1.ipynb
A  Thyristors_Theory_And_Applications_by_R._K._Sugandhi_And_K._K._Sugandhi/Chapter5_Line_Commutated_converters_1.ipynb
A  Thyristors_Theory_And_Applications_by_R._K._Sugandhi_And_K._K._Sugandhi/Chapter7_Inverter_Circuits_1.ipynb
A  Thyristors_Theory_And_Applications_by_R._K._Sugandhi_And_K._K._Sugandhi/Chapter8_Harmonic_and_PowerFactor_with_the_converter_system_1.ipynb
A  Thyristors_Theory_And_Applications_by_R._K._Sugandhi_And_K._K._Sugandhi/Chapter_2_The_Device__1.ipynb
A  Thyristors_Theory_And_Applications_by_R._K._Sugandhi_And_K._K._Sugandhi/screenshots/11.JPG
A  Thyristors_Theory_And_Applications_by_R._K._Sugandhi_And_K._K._Sugandhi/screenshots/15.JPG
A  Thyristors_Theory_And_Applications_by_R._K._Sugandhi_And_K._K._Sugandhi/screenshots/8.JPG

1 files changed, 157 insertions, 0 deletions

diff --git a/Electronic_Communication_by_D._Roddy/Chapter7_Receivers.ipynb b/Electronic_Communication_by_D._Roddy/Chapter7_Receivers.ipynb
new file mode 100644
index 00000000..1cf5b9ae
--- /dev/null
+++ b/Electronic_Communication_by_D._Roddy/Chapter7_Receivers.ipynb
@@ -0,0 +1,157 @@
+{
+ "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
+}