Added(A)/Deleted(D) following books

 A  Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/Ch1.ipynb
A  Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/Ch2.ipynb
A  Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/Ch3.ipynb
A  Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/Ch4.ipynb
A  Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/Ch5.ipynb
A  Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/Ch6.ipynb
A  Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/Ch7.ipynb
A  Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/Ch8.ipynb
A  Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/README.txt
A  Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/screenshots/6.1.png
A  Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/screenshots/6.png
A  Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/screenshots/7.png
A  OpAmps_And_Linear_Integrated_Circuits_by_Gayakwad/Chapter1.ipynb
A  OpAmps_And_Linear_Integrated_Circuits_by_Gayakwad/Chapter2.ipynb
A  OpAmps_And_Linear_Integrated_Circuits_by_Gayakwad/Chapter3.ipynb
A  OpAmps_And_Linear_Integrated_Circuits_by_Gayakwad/Chapter4.ipynb
A  OpAmps_And_Linear_Integrated_Circuits_by_Gayakwad/Chapter5.ipynb
A  OpAmps_And_Linear_Integrated_Circuits_by_Gayakwad/Chapter6.ipynb
A  OpAmps_And_Linear_Integrated_Circuits_by_Gayakwad/Chapter7.ipynb
A  OpAmps_And_Linear_Integrated_Circuits_by_Gayakwad/Chapter8.ipynb
A  OpAmps_And_Linear_Integrated_Circuits_by_Gayakwad/Chapter9.ipynb
A  OpAmps_And_Linear_Integrated_Circuits_by_Gayakwad/README.txt
A  OpAmps_And_Linear_Integrated_Circuits_by_Gayakwad/screenshots/1.png
A  OpAmps_And_Linear_Integrated_Circuits_by_Gayakwad/screenshots/2.png
A  OpAmps_And_Linear_Integrated_Circuits_by_Gayakwad/screenshots/8.png
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter10_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter11_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter12_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter13_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter14_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter15_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter16_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter17_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter18_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter19_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter1_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter20_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter21_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter22_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter23_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter24_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter25_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter26_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter2_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter6_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter7_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter8_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter9_6.ipynb
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/screenshots/chapter10_ac_load_line_5.png
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/screenshots/chapter18_clipping_ckt_output_6.png
A  Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/screenshots/chapter8_dc_load_line_6.png

1 files changed, 332 insertions, 0 deletions

diff --git a/Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/Ch3.ipynb b/Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/Ch3.ipynb
new file mode 100644
index 00000000..6c538996
--- /dev/null
+++ b/Fundamentals_Of_Electronic_Devices_by_J._B._Gupta/Ch3.ipynb
@@ -0,0 +1,332 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter3 : Excess Carriers in Semiconductor"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Example 3.2 Page No 111"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Minimum required energy is 2.06 eV \n"
+     ]
+    }
+   ],
+   "source": [
+    "#Example 3.2\n",
+    "#What is Minimum required energy \n",
+    "\n",
+    "#given data\n",
+    "l=6000                 #in Angstrum\n",
+    "h=6.6*10**(-34)             #Planks constant\n",
+    "c=3*10**8                   #speed of light in m/s\n",
+    "e=1.602*10**(-19)            #Constant\n",
+    "\n",
+    "#calculation\n",
+    "phi=c*h/(e*l*10**(-10))\n",
+    "\n",
+    "#result\n",
+    "print\"Minimum required energy is\",round(phi,2),\"eV \"\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Example 3.3 Page No 112"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Work function of the cathode material is  2.39 eV\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Exa 3.3\n",
+    "#calculate Work function of the cathode material\n",
+    "\n",
+    "#given data\n",
+    "Emax=2.5                   #maximum energy of emitted electrons in eV \n",
+    "l=2537.0                #in Angstrum\n",
+    "\n",
+    "#Calculation\n",
+    "EeV=12400.0/l           #in eV\n",
+    "phi=EeV-Emax               #in eV\n",
+    "\n",
+    "#result\n",
+    "print \"Work function of the cathode material is \",round(phi,2),\"eV\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Example 3.4 Page No 115"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "(i)Thus power absorbed is  0.009 J/s\n",
+      "(ii)Energy converted into heat is 0.0026 J/s\n",
+      "(iii)Number of photons per second given off from recombination events  2.81e+16\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Example 3.4\n",
+    "#Find (i)The fraction of each photon energy unit which is converted into heat\",f\n",
+    "#(ii)Energy converted into heat in ,((2-1.43)/2)*0.009,\"J/s\"\n",
+    "#(iii)Number of photons per second given off from recombination events \",0.009/(e*2)\n",
+    "\n",
+    "#given data\n",
+    "t=0.46*10**-4                 #in centi meters\n",
+    "hf1=2                          #in ev\n",
+    "hf2=1.43\n",
+    "Pin=10                        #in mW\n",
+    "alpha=50000                   # in per cm\n",
+    "e=1.6*10**-19                 #constant\n",
+    "Io=0.01                   #in mW\n",
+    "\n",
+    "import math\n",
+    "\n",
+    "#Calculation\n",
+    "It=Io*math.exp(-alpha*t)           #in mW\n",
+    "Iabs=Io-It\n",
+    "f=(hf1-hf2)/hf1\n",
+    "E=f*Iabs\n",
+    "N=Iabs/(e*hf1)\n",
+    "\n",
+    "#result\n",
+    "print\"(i)Thus power absorbed is \",round(Iabs,3),\"J/s\"\n",
+    "print\"(ii)Energy converted into heat is\",round(E,4),\"J/s\"\n",
+    "print\"(iii)Number of photons per second given off from recombination events \",round(N,-14)\n",
+    "#In book there is calculation mistake in Number of photons."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Example 3.5 Page No 123"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 29,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Electron transit time in sec is  6.4e-09 s\n",
+      "Photoconductor gain is  216.0\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Example 3.5\n",
+    "#What is Photoconductor gain \n",
+    "#Electron transit time.\n",
+    "\n",
+    "#given data\n",
+    "L=100                     #in uM\n",
+    "A=10&-7                   #in cm**2\n",
+    "th=10**-6                 #in sec\n",
+    "V=12                      #in Volts\n",
+    "ue=0.13                   #in m**2/V-s\n",
+    "uh=0.05                   #in m**2/V-s\n",
+    "\n",
+    "#Calculation\n",
+    "E=V/(L*10**-6)            #in V/m\n",
+    "tn=(L*10**-6)/(ue*E)\n",
+    "Gain=(1+uh/ue)*(th/tn)\n",
+    "\n",
+    "#result\n",
+    "print\"Electron transit time in sec is \",round(tn,10),\"s\"\n",
+    "print\"Photoconductor gain is \",Gain"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Example 3.6 Page No128"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 30,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Current flowing through diode is  15.0 micra A\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Example3.6\n",
+    "#Calculate Current flowing through diode .\n",
+    "\n",
+    "#given datex\n",
+    "import math\n",
+    "Io=0.15                    #in uA\n",
+    "V=0.12                     #in mVolt\n",
+    "Vt=26                      #in mVolt\n",
+    "\n",
+    "#calculation\n",
+    "I=Io*10**-6*(math.exp(V/(Vt*10**-3))-1)          #in A\n",
+    "\n",
+    "#result\n",
+    "print\"Current flowing through diode is \",round(I*10**6,2),\"micra A\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Example 3.7 Page No 128"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 31,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Forward voltage  is  0.43 V\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Exa 3.7\n",
+    "#Determine the Forward voltage \n",
+    "\n",
+    "#given data\n",
+    "import math\n",
+    "Io=2.5              #in uA\n",
+    "I=10                #in mA\n",
+    "Vt=26               #in mVolt\n",
+    "n=2                 #for silicon\n",
+    "\n",
+    "#Calculation\n",
+    "V=n*Vt*10**-3*math.log((I*10**-3)/(Io*10**-6))\n",
+    "\n",
+    "#Result\n",
+    "print \"Forward voltage  is \",round(V,2),\"V\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Example 3.8 Page No 128"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 33,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Reverse saturation current density is  0.16 uA \n"
+     ]
+    }
+   ],
+   "source": [
+    "#Example 3.8\n",
+    "#What is Reverse saturation current density \n",
+    "\n",
+    "#given data\n",
+    "ND=10**21                #in m**-3\n",
+    "NA=10**22                #in m**-3\n",
+    "De=3.4*10**-3            #in m**2-s**-1\n",
+    "Dh=1.2*10**-3            #in m**2-s**-1\n",
+    "Le=7.1*10**-4            #in meters\n",
+    "Lh=3.5*10**-4            #in meters\n",
+    "ni=1.6*10**16            #in m**-3\n",
+    "e=1.602*10**-19          #constant\n",
+    "\n",
+    "#calculation\n",
+    "IoA=e*ni**2*(Dh/(Lh*ND)+De/(Le*NA))\n",
+    "\n",
+    "#Result\n",
+    "print\"Reverse saturation current density is \",round(IoA*10**6,2),\"uA \""
+   ]
+  }
+ ],
+ "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": "2.7.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}