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, 312 insertions, 0 deletions

diff --git a/Electronic_Communication_by_D._Roddy/Chapter6_Oscillators.ipynb b/Electronic_Communication_by_D._Roddy/Chapter6_Oscillators.ipynb
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+++ b/Electronic_Communication_by_D._Roddy/Chapter6_Oscillators.ipynb
@@ -0,0 +1,312 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter6 Oscillators"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 6.3.1,Pg.no.199"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "1.The minimum value of beta is 44.54\n",
+      "2.The value of resistor R= 21.6 Kohm\n",
+      "3.The value of capacitor is 4494.19 pF\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "from math import pi,sqrt\n",
+    "f=400.0\n",
+    "rc= 10.0\n",
+    "Rc= 40.0      \n",
+    "#Minimum value of beta is given by Bomin= 23+(4*Ro /R)+(29*R/Ro)            \n",
+    "#For minimum beta Ro/R=2.7, we represent Ro/R=b\n",
+    "b=2.7\n",
+    "Bomin=23+(4*b)+(29*1/b)\n",
+    "Bomin=round(Bomin,2)\n",
+    "print '1.The minimum value of beta is',Bomin\n",
+    "#Determination of R and C components\n",
+    "#R0 is given by ( rc*Rc) /( rc+Rc)\n",
+    "R0=(rc*Rc)/(rc+Rc)\n",
+    "R=2.7* R0\n",
+    "print '2.The value of resistor R=',R,'Kohm'\n",
+    "c=1/(2*pi*f*R*sqrt(6+(4*b)))*10**9\n",
+    "c=round(c,2)\n",
+    "print '3.The value of capacitor is',c,'pF'"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 6.3.2,Pg.no.200"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The value of capacitor is 767.44 pF\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "from math import pi,sqrt\n",
+    "#given\n",
+    "f=800.0\n",
+    "R0=18.0\n",
+    "#calculations\n",
+    "R=100.0\n",
+    "c=1/(2*pi*f*R*sqrt(6+(4*R0/R)))*10**9      #Capacitance in pF\n",
+    "c=round(c,2)\n",
+    "print 'The value of capacitor is',c,'pF'"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 6.3.3,Pg.no.201"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The value of capacitor is 614.0 pF\n",
+      "1.The required open−circuit voltage gain is 30.16\n",
+      "2.The value of gm is 6.03 mS\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "f=1000.0\n",
+    "Ro=5.0\n",
+    "R=100.0\n",
+    "c=1/(2*pi*f*R*sqrt(6+(4*R0/R)))*10**9\n",
+    "c=round(c,1)\n",
+    "print 'The value of capacitor is',c,'pF'\n",
+    "#The required open−circuit voltage gain is\n",
+    "Ao= 29+23*(Ro/R)+4*(Ro/R)**2\n",
+    "Ao=round(Ao,2)\n",
+    "print'1.The required open−circuit voltage gain is',Ao\n",
+    "gm=Ao/Ro\n",
+    "gm=round(gm,2)\n",
+    "print '2.The value of gm is',gm,'mS'"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 6.4.1,Pg.no.205"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "1.The value of capacitor is 75.0 pF\n",
+      "2.The frequency of oscillation is 918881.49 Hz\n",
+      "3.The dynamic impedence of the tuned circuit 461880.22 ohm\n",
+      "4.The coil series resistance is 11.55 ohm\n",
+      "5.The value of gm is 1.15470052676e-05\n",
+      "6.The input resistance is 8660254.12 ohm\n",
+      "7.The frequency of oscillation is 918881.49 Hz\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "from math import pi,sqrt\n",
+    "L=400*10**-6       #inductsnce in H\n",
+    "c1= 100.0          #capaitance in pF\n",
+    "c2= 300.0          #in pF\n",
+    "Q=200.0\n",
+    "Ro= 5*10**3\n",
+    "Bo=100.0           #beta value\n",
+    "#The tuning capacitance is\n",
+    "Cs=(c1*c2/(c1+c2))\n",
+    "Cs=round(Cs,2)\n",
+    "print '1.The value of capacitor is',Cs,'pF'\n",
+    "#the frequency of oscillation is obtained as\n",
+    "f=1/(2*pi*sqrt(L*Cs*10**-12))\n",
+    "f=round(f,2)\n",
+    "print '2.The frequency of oscillation is',f,'Hz'\n",
+    "#The dynamic impedence of the tuned circuit\n",
+    "wo= 2*pi*f\n",
+    "Rd=Q/(wo*Cs*10**-12)\n",
+    "Rd=round(Rd,2)\n",
+    "print '3.The dynamic impedence of the tuned circuit',Rd,'ohm'\n",
+    "#The coil series resistance is\n",
+    "r=wo*L/Q\n",
+    "r=round(r,2)\n",
+    "print '4.The coil series resistance is',r,'ohm'\n",
+    "#The capacitor raio c= c1/c2=1/3, and therefore 1− c2/B0∗c1 = 1\n",
+    "#The starting value of gm is therefore given by\n",
+    "c= c1/c2\n",
+    "gm=(1/Ro)*c +(c+3+2)*(1/Rd)\n",
+    "print '5.The value of gm is',gm\n",
+    "#Assuming the input resistance is that of the transistor alone\n",
+    "R1=Bo/gm\n",
+    "R1=round(R1,2)\n",
+    "print '6.The input resistance is',R1,'ohm'\n",
+    "wo2=1/((L*Cs*10**-12)+(1/R1*Ro*c1*c2*10**-12*10**-12))\n",
+    "wo=sqrt(wo2)\n",
+    "f=wo/(2*pi)\n",
+    "f=round(f,2)\n",
+    "print '7.The frequency of oscillation is',f,'Hz'"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 6.6.1,Pg.no.211"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The value of capacitor is 5.16 pF\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "Co=20.0  #in pF\n",
+    "Vd=-7    #reverse bias voltage in volt\n",
+    "#constant pottential of junction is 0.5\n",
+    "a=0.5    #for abrupt junction\n",
+    "Cd=Co/(1-(Vd/0.5))**a\n",
+    "Cd=round(Cd,2)\n",
+    "print 'The value of capacitor is',Cd,'pF'"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 6.6.2,Pg.no.212"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "1.The total tuning capacitor is 9.38 pF\n",
+      "2.The frequency of oscillation is 5196593.1 Hz\n",
+      "3.The total tuning capacitor is 3.99 pF\n",
+      "4.The frequency of oscillation is 7967713.03 Hz\n"
+     ]
+    }
+   ],
+   "source": [
+    "from math import pi,sqrt\n",
+    "#given\n",
+    "C1=300.0\n",
+    "C2=300.0\n",
+    "Cc=20.0\n",
+    "L=100.0\n",
+    "#calculations\n",
+    "# A) With zero applied bias , the total tuning capacitor is \n",
+    "Vd1=0\n",
+    "a=0.5\n",
+    "Co=20.0\n",
+    "Cd1=Co/(1-(Vd1/0.5))**a\n",
+    "Cs1=1/((1/C1)+(1/C2)+(1/Cc)+(1/Cd1))\n",
+    "Cs1=round(Cs1,2)\n",
+    "print '1.The total tuning capacitor is',Cs1,'pF'\n",
+    "#The frequency of oscillation is\n",
+    "f=1/(2*pi*sqrt(L*10**-6*Cs1*10**-12))\n",
+    "f=round(f,2)\n",
+    "print '2.The frequency of oscillation is',f,'Hz'\n",
+    "Vd2=-7\n",
+    "Cd2=Co/(1-(Vd2/0.5))**a\n",
+    "Cs2=1/((1/C1)+(1/C2)+(1/Cc)+(1/Cd2))\n",
+    "Cs2=round(Cs2,2)\n",
+    "print '3.The total tuning capacitor is',Cs2,'pF'\n",
+    "f=1/(2*pi*sqrt(L*10**-6*Cs2*10**-12))\n",
+    "f=round(f,2)\n",
+    "print '4.The frequency of oscillation is',f,'Hz'"
+   ]
+  }
+ ],
+ "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
+}