From 251a07c4cbed1a5a960f5ed416ce6ac13c8152b7 Mon Sep 17 00:00:00 2001
From: hardythe1
Date: Thu, 11 Jun 2015 17:31:11 +0530
Subject: add books

---
 .../Chapter9.ipynb                                 | 195 +++++++++++++++++++++
 1 file changed, 195 insertions(+)
 create mode 100755 Engineering_Physics_by_P.K.Palanisamy/Chapter9.ipynb

(limited to 'Engineering_Physics_by_P.K.Palanisamy/Chapter9.ipynb')

diff --git a/Engineering_Physics_by_P.K.Palanisamy/Chapter9.ipynb b/Engineering_Physics_by_P.K.Palanisamy/Chapter9.ipynb
new file mode 100755
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@@ -0,0 +1,195 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#9: Physics of Semiconductor Devices"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##Example number 9.1, Page number 9.14"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "wavelength of radiation is 0.868 micro m\n"
+     ]
+    }
+   ],
+   "source": [
+    "#importing modules\n",
+    "import math\n",
+    "from __future__ import division\n",
+    "\n",
+    "#Variable declaration\n",
+    "h=6.62*10**-34;     #planck's constant(J sec)\n",
+    "c=3*10**8;     #velocity of light(m/sec)\n",
+    "Eg=1.43*1.6*10**-19;    #energy gap(J)\n",
+    "\n",
+    "#Calculation\n",
+    "lamda=h*c*10**6/Eg;    #wavelength of radiation(micro m)\n",
+    "\n",
+    "#Result\n",
+    "print \"wavelength of radiation is\",round(lamda,3),\"micro m\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##Example number 9.2, Page number 9.28"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "time taken is 3.7 *10**-9 s\n"
+     ]
+    }
+   ],
+   "source": [
+    "#importing modules\n",
+    "import math\n",
+    "from __future__ import division\n",
+    "\n",
+    "#Variable declaration\n",
+    "d=5*10**-6;     #thickness(m)\n",
+    "Dc=3.4*10**-3;    #diffusion coefficient(m**2 S-1)\n",
+    "\n",
+    "#Calculation\n",
+    "tow_diff=d**2/(2*Dc);     #time taken(s)\n",
+    "\n",
+    "#Result\n",
+    "print \"time taken is\",round(tow_diff*10**9,1),\"*10**-9 s\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##Example number 9.3, Page number 9.28"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "transit time is 5e-11 s\n"
+     ]
+    }
+   ],
+   "source": [
+    "#importing modules\n",
+    "import math\n",
+    "from __future__ import division\n",
+    "\n",
+    "#Variable declaration\n",
+    "w=5*10**-6;     #thickness(m)\n",
+    "vsat=10**5;     #velocity(m/s)\n",
+    "\n",
+    "#Calculation\n",
+    "tow_drift=w/vsat;     #transit time(s)\n",
+    "\n",
+    "#Result\n",
+    "print \"transit time is\",tow_drift,\"s\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##Example number 9.4, Page number 9.29"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 16,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "diode capacitance is 28.8 pF\n",
+      "frequency bandwidth is 110 MHz\n",
+      "answer varies due to rounding off errors\n"
+     ]
+    }
+   ],
+   "source": [
+    "#importing modules\n",
+    "import math\n",
+    "from __future__ import division\n",
+    "\n",
+    "#Variable declaration\n",
+    "A=10**-6;     #area(m**2)\n",
+    "e=1.6*10**-19;     #charge(coulomb)\n",
+    "Nd=10**21;     #electron concentration(m**-3)\n",
+    "epsilonr=11.7;\n",
+    "epsilon0=8.85*10**-12;\n",
+    "V=10;    #potential(V)\n",
+    "RL=50;   #resistance(ohm)\n",
+    "\n",
+    "#Calculation\n",
+    "Cj=(A/2)*math.sqrt(2*e*epsilonr*epsilon0*Nd/V);      #diode capacitance(F)\n",
+    "delta_fel=1/(2*math.pi*RL*Cj);    #frequency bandwidth(Hz)\n",
+    "\n",
+    "#Result\n",
+    "print \"diode capacitance is\",round(Cj*10**12,1),\"pF\"\n",
+    "print \"frequency bandwidth is\",int(delta_fel*10**-6),\"MHz\"\n",
+    "print \"answer varies due to rounding off errors\""
+   ]
+  }
+ ],
+ "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": "2.7.9"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}
-- 
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