path: root/Fundamental_of_Electronics_Devices/Ch7.ipynb

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 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Chapter 7: Field effect Transistors"
     ]
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Example 7.1 page no. 262"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "VGS=10\t\t\t#in Volt\n",
      "IG=0.001\t\t#in uA\n",
      "IG=IG*10**-6\t\t#in A\n",
      "\n",
      "RGS=VGS/IG\t\t#in ohm\n",
      "\n",
      "print\"Resistance between gate and source is  \",RGS/10**6,\"ohm\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Resistance between gate and source is   10000.0 ohm\n"
       ]
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Example 7.2 page no.262"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "delVDS=1.5\t\t\t#in Volt\n",
      "delID=120\t\t\t#in uA\n",
      "delID=120*10**-6\t\t#in A\n",
      "\n",
      "rd=delVDS/delID\t\t\t#in Ohm\n",
      "\n",
      "print\"AC drain resistance of JFET in Kohm \",rd*10**-3,\"kohm\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "AC drain resistance of JFET in Kohm  12.5 kohm\n"
       ]
      }
     ],
     "prompt_number": 2
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Example 7.3 page no. 262"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "VP=-4.5\t\t\t#in Volt\n",
      "IDSS=10.0\t\t\t#in mA\n",
      "IDS=2.5\t\t\t#in mA\n",
      "\n",
      "VGS=VP*(1-math.sqrt(IDS/IDSS))\t\t#in Volt\n",
      "gm=(-2*IDSS/VP)*(1-VGS/VP)\t\t#in mA/Volt\n",
      "\n",
      "print\"Transconductance is\",round(gm,2),\"mA/v\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Transconductance is 2.22 mA/v\n"
       ]
      }
     ],
     "prompt_number": 4
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Example 7.4 page no. 262"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "gm=10\t\t\t#in mS\n",
      "IDSS=10\t\t\t#in uA\n",
      "IDSS=IDSS-10**-6\t#in Ampere\n",
      "\n",
      "VGS_OFF=-2*IDSS/gm\n",
      "\n",
      "print\"VGS(OFF) is =\",round(VGS_OFF),\"mV\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "VGS(OFF) is = -2.0 mV\n"
       ]
      }
     ],
     "prompt_number": 6
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Example 7.5 page no. 262"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "VP=-4.0\t\t\t   #in Volt\n",
      "IDSS=10.0\t\t\t #in mA\n",
      "IDSS=IDSS*10**-3\t#in Ampere\n",
      "VGS=-2.0              #in Volt\n",
      "\n",
      "ID=IDSS*(1.0-VGS/VP)**2\t#in mA\n",
      "\n",
      "print \"Drain current=\",ID*1000,\"mA\"\n",
      "print\"VDS(min) is : \",VP,\"V\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Drain current= 2.5 mA\n",
        "VDS(min) is :  -4.0 V\n"
       ]
      }
     ],
     "prompt_number": 6
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Example 7.6 page no. 263"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "VP=-3.0\t\t\t#in Volt\n",
      "IDSS=8.7\t\t#in mA\n",
      "IDSS=IDSS*10**-3\t#in mA\n",
      "VGS=-1\t\t\t#in Volt\n",
      "\n",
      "ID=IDSS*(1-VGS/VP)**2\t#in Ampere\n",
      "gmo=-2*IDSS/VP\t\t#in mS\n",
      "gm=gmo*(1-VGS/VP)\t#in mS\n",
      "\n",
      "print\"ID is \",round(ID*1000,1),\"mA\"\n",
      "print\"gmo is\",round(gmo*1000,1),\"mS\"\n",
      "print\"gm is  \",round(gm*1000,1),\"mS\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "ID is  3.9 mA\n",
        "gmo is 5.8 mS\n",
        "gm is   3.9 mS\n"
       ]
      }
     ],
     "prompt_number": 13
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Example 7.7 page no.263"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "VP=-3.0 \t\t#in Volt\n",
      "IDSS=8.4 \t#in mA\n",
      "VGS=-1.5 \t#in Volt\n",
      "\n",
      "ID=IDSS*(1-VGS/VP)**2 \t\t#in mA\n",
      "gmo=-2*IDSS/VP \t\t\t#in mS\n",
      "gm=gmo*(1-VGS/VP) \t\t#in mS\n",
      "\n",
      "print\"Drain current=\",ID,\"mA\"\n",
      "print\"Transconductance is \",gm,\"mS\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Drain current= 2.1 mA\n",
        "Transconductance is  2.8 mS\n"
       ]
      }
     ],
     "prompt_number": 9
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Example 7.8 page no.263"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "VP=-4.5 \t\t   #in Volt\n",
      "IDSS=9 \t\t\t#in mA\n",
      "IDSS=IDSS*10**-3   #in Ampere\n",
      "IDS=3 \t\t\t #in mA\n",
      "IDS=IDS*10**-3 \t\t#in Ampere\n",
      "\n",
      "import math\n",
      "VGS=VP*(1-math.sqrt(IDS/IDSS)) \t#in Volt\n",
      "gm=(-2*IDSS/VP)*(1-VGS/VP) \t\t#in mS\n",
      "\n",
      "print\"IDS = 3 mA when gm is \",round(gm*1000,2),\"mS\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "IDS = 3 mA when gm is  2.31 mS\n"
       ]
      }
     ],
     "prompt_number": 17
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Example 7.9 page no.271"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "Vp=-4.0 \t\t\t   #in Volt\n",
      "IDSS=10.0 \t\t    #in mA\n",
      "Vgs1=0\n",
      "Id1=IDSS                 # mA, at Vgs=0\n",
      "Vgs2=1\n",
      "Id2=Id1*(1-Vgs2/Vp)**2   #mA, at Vgs=1\n",
      "Vgs3=-1\n",
      "Id3=Id1*(1-Vgs3/Vp)**2   #mA, at Vgs=1\n",
      "Vgs4=-2\n",
      "Id4=Id1*(1-Vgs4/Vp)**2   #mA, at Vgs=-2\n",
      "Vgs5=-4\n",
      "Id5=Id1*(1-Vgs5/Vp)**2   #mA, at Vgs=-4\n",
      "\n",
      "print \"Transfer Characteristics are in mA \",Id1,Id2,Id3,Id4,Id5\n",
      "\n",
      "import matplotlib.pyplot as plt\n",
      "fig = plt.figure()\n",
      "ax = fig.add_subplot(111)\n",
      "\n",
      "Vgs=[-4,-2,-1,0,1]\n",
      "Id=[0,2.5,5.625,10,15.625]\n",
      "xlabel(\"Vgs  (V)\") \n",
      "ylabel(\"Id  (mA)\") \n",
      "plt.xlim((-4,2))\n",
      "plt.ylim((0,18))\n",
      "ax.plot([0], [10], 'o')\n",
      "ax.annotate('(Idss)', xy=(0,10))\n",
      "\n",
      "a=plot(Vgs,Id)\n",
      "\n",
      "print \"Transfer Characteristics for N channel MOSFET Type\"\n",
      "show(a)\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Transfer Characteristics are in mA  10.0 15.625 5.625 2.5 0.0\n",
        "Transfer Characteristics for N channel MOSFET Type"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n"
       ]
      },
      {
       "output_type": "display_data",
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3T4flaksM2DwAyTnJ8LPzw+UPLiPp3SQsGrgI/Tv118rCr+2DjHUN90936fO+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\nRK5CYII=\n"
      }
     ],
     "prompt_number": 27
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Example 7.10 page no.275"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "ID_on=5 \t\t#in mA\n",
      "VGS=6 \t\t\t#in Volt\n",
      "VGS_on=8.0 \t\t#in Volt\n",
      "VGST=4 \t\t\t#in Volt\n",
      "\n",
      "K=ID_on/(VGS_on-VGST)**2 \t\t#in mA/V**2\n",
      "ID=K*(VGS-VGST)**2 \t\t\t#in mA\n",
      "\n",
      "print\"When VGS=6V the drain current is \",ID,\"mA\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "When VGS=6V the drain current is  1.25 mA\n"
       ]
      }
     ],
     "prompt_number": 20
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [],
     "language": "python",
     "metadata": {},
     "outputs": []
    }
   ],
   "metadata": {}
  }
 ]
}