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Diffstat (limited to 'Electronic_Devices_and_Circuits_by_David_A._Bell/Chapter10.ipynb')
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diff --git a/Electronic_Devices_and_Circuits_by_David_A._Bell/Chapter10.ipynb b/Electronic_Devices_and_Circuits_by_David_A._Bell/Chapter10.ipynb new file mode 100755 index 00000000..b92c4b1d --- /dev/null +++ b/Electronic_Devices_and_Circuits_by_David_A._Bell/Chapter10.ipynb @@ -0,0 +1,587 @@ +{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 10 : FET biasing"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.1, Page No 381"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "\n",
+ "Vdd=22.0\n",
+ "Rd=2.0*10**3\n",
+ "\n",
+ "#Calculations\n",
+ "print(\"when Id=0\")\n",
+ "Id=0\n",
+ "Vds=Vdd-Id*Rd\n",
+ "print('at point A Vds = %.2f V' %Vds)\n",
+ "Vds=0\n",
+ "Id=Vdd/Rd\n",
+ "\n",
+ "#Results\n",
+ "print(\"when Vds=0\")\n",
+ "print('at point A Id = %.2f mA' %(Id*10**3))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "when Id=0\n",
+ "at point A Vds = 22.00 V\n",
+ "when Vds=0\n",
+ "at point A Id = 11.00 mA\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.4, Page No 387"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "\n",
+ "Idss=8.0*10**-3\n",
+ "Vpmax=6.0\n",
+ "Vgs=2.3\n",
+ "Vgsmax=6\n",
+ "\n",
+ "#Calculations\n",
+ "Id=Idss*(1-(Vgs/Vgsmax))**2\n",
+ "Idss=4*10**-3\n",
+ "Vp=3\n",
+ "Idmin=Idss*(1-(Vgs/Vp))**2\n",
+ "\n",
+ "#Results\n",
+ "print('at point A Idmin = %.2f mA' %(Idmin*10**3))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "at point A Idmin = 0.22 mA\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.6 Page No 393"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "Vdd=25.0\n",
+ "R2=1.0*10**6\n",
+ "R1=3.8*10**6\n",
+ "Rs=2.5*10**3\n",
+ "Rd=2.5*10**3\n",
+ "\n",
+ "#Calculations\n",
+ "Vg=(Vdd*R2)/(R1+R2)\n",
+ "print(\"when Id=0\")\n",
+ "Id=0\n",
+ "Vgs=Vg-Id*Rs\n",
+ "print(\" plot point A at Id=0\")\n",
+ "print('at point A Vds = %.2f A/s' %Vds)\n",
+ "Vgs=0\n",
+ "Id=Vg/Rs\n",
+ "print(\" plot point B Vgs=0\")\n",
+ "print('at point A Id = %.2f A/s' %Id)\n",
+ "Idmax=3*10**-3\n",
+ "Idmin=2.3*10**-3\n",
+ "Vdsmin=Vdd-Idmax*(Rd+Rs)\n",
+ "Vdsmax=Vdd-Idmin*(Rd+Rs)\n",
+ "\n",
+ "#Results\n",
+ "print('The value of Vdsmax = %.2f V' %(Vdsmax))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "when Id=0\n",
+ " plot point A at Id=0\n",
+ "at point A Vds = 0.00 A/s\n",
+ " plot point B Vgs=0\n",
+ "at point A Id = 0.00 A/s\n",
+ "The value of Vdsmax = 13.50 V\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.7, Page No 401"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "\n",
+ "Id=3.0*10**-3\n",
+ "Vgs=-2.3\n",
+ "Vdsmin=10.0\n",
+ "Vdd=25.0\n",
+ "Vgsoff=-6\n",
+ "Idss=8.0*10**-3\n",
+ "\n",
+ "#Calculations\n",
+ "Vgs=Vgsoff*(1-math.sqrt(Id/Idss))\n",
+ "Rd=(Vdd-Vdsmin)/Id\n",
+ "\n",
+ "#Results\n",
+ "print('The value of Td = %.2f kohm' %(Rd/1000))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The value of Td = 5.00 kohm\n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.8 Page No 403"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "Id=3.0*10**-3\n",
+ "Vds=10.0\n",
+ "Vdd=25.0\n",
+ "Vgs=2.3\n",
+ "\n",
+ "#Calculations\n",
+ "Rs=Vgs/Id\n",
+ "Rd=((Vdd-Vds)/Id)-Rs\n",
+ "\n",
+ "#Results\n",
+ "print('The value of Rd = %.2f ohm' %(Rd/1000))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The value of Rd = 4.23 ohm\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.9 Page No 405"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "Id=3.0*10**-3\n",
+ "Vds=10.0\n",
+ "Vdd=25.0\n",
+ "Vg=5.2\n",
+ "Vgsoff=-6\n",
+ "Idss=8.0*10**-3\n",
+ "R2=1.0*10**6\n",
+ "\n",
+ "#Calculations\n",
+ "R=(Vdd-Vds)/Id#R=(Rs+Rd)/2\n",
+ "Rd=R/2\n",
+ "Rs=Rd\n",
+ "Vgs=Id*Rs\n",
+ "Vgs=Vgsoff*(1-math.sqrt(Id/Idss))\n",
+ "Vs=Id*Rs\n",
+ "Vg=Vs-(-Vgs)\n",
+ "R1=((Vdd-Vg)*R2)/Vg\n",
+ "\n",
+ "#Results\n",
+ "print('The value of R = %.2f Mohm' %(R1/10**6))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The value of R = 3.83 Mohm\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.11, Page No 412"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "\n",
+ "Vee=20.0\n",
+ "Id=3.0*10**-3\n",
+ "Vds=9.0\n",
+ "Vbe=.7\n",
+ "Vb=0\n",
+ "Ve=Vee-Vbe\n",
+ "\n",
+ "#Calculations\n",
+ "Re=Ve/Id\n",
+ "Re=6.8*10**3#satnadard value\n",
+ "Id=Ve/Re\n",
+ "Idss=16*10**-3\n",
+ "Vgsoff=-8\n",
+ "Vgs=Vgsoff*(1-math.sqrt(Id/Idss))\n",
+ "Vs=Vb-Vgs\n",
+ "Vrd=Vee-Vds-Vs\n",
+ "Rd=Vrd/Id\n",
+ "\n",
+ "#Results\n",
+ "print('The value of Rd = %.2f V' %(Rd/1000))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The value of Rd = 2.24 V\n"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.12 Page No 415"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math \n",
+ "\n",
+ "#initialisation of variables\n",
+ "Idss=5.0*10**-3\n",
+ "Vgsoff=6.0\n",
+ "Rs=3.3*10**3\n",
+ "Vdd=20.0\n",
+ "Rd=Rs\n",
+ "\n",
+ "#Calculations\n",
+ "print(\"when Id=0 % Vgs=Vs=0\")\n",
+ "Id=0\n",
+ "Vgs=0\n",
+ "Vs=0\n",
+ "print(\" at point A universal transfer characteristic Id/Idss and Vgs/Vgsoff=0\")\n",
+ "Id=1.5*10**-3\n",
+ "Vgs=Id*Rs\n",
+ "y=Id/Idss\n",
+ "x=Vgs/Vgsoff\n",
+ "print(\" point B the universal transfer charecteristic x=.825 and y=.3\")\n",
+ "Id=.2*Idss\n",
+ "Vds=Vdd-Id*(Rd+Rs)\n",
+ "\n",
+ "#Results\n",
+ "print('The value of Vds = %.2f V' %(Vds))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "when Id=0 % Vgs=Vs=0\n",
+ " at point A universal transfer characteristic Id/Idss and Vgs/Vgsoff=0\n",
+ " point B the universal transfer charecteristic x=.825 and y=.3\n",
+ "The value of Vds = 13.40 V\n"
+ ]
+ }
+ ],
+ "prompt_number": 8
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.13 Page No 416"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "\n",
+ "Idss=9.0*10**-3\n",
+ "Vgsoff=7.0\n",
+ "Vdd=22.0\n",
+ "R1=4.7*10**6\n",
+ "R2=1.0*10**6\n",
+ "Rs=2.7*10**3\n",
+ "Rd=Rs\n",
+ "\n",
+ "#Calculations\n",
+ "Vg=(Vdd*R2)/(R1+R2)\n",
+ "print(\"when Vgs=0 % Vgs/Vgsoff=0\")\n",
+ "Id=Vg/Rs\n",
+ "print(\"when Vgs/Vgsoff=.5\")\n",
+ "Vgs=.5*(-Vgsoff)\n",
+ "Id=(Vg-Vgs)/Rs\n",
+ "x=Id/Idss\n",
+ "print(\" point Y on universal characteristic x=.3 and Vgs/Vgsoff=.5\")\n",
+ "print(\"draw voltage divider bias line through X nad Y where bisa line intersect transfer curve\")\n",
+ "Id=.29*Idss\n",
+ "Vds=Vdd-Id*(Rd+Rs)\n",
+ "\n",
+ "#Results\n",
+ "print('The value of Vds= %.2f V' %(Vds))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "when Vgs=0 % Vgs/Vgsoff=0\n",
+ "when Vgs/Vgsoff=.5\n",
+ " point Y on universal characteristic x=.3 and Vgs/Vgsoff=.5\n",
+ "draw voltage divider bias line through X nad Y where bisa line intersect transfer curve\n",
+ "The value of Vds= 7.91 V\n"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.14 Page No 419"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "\n",
+ "Vdd=40.0\n",
+ "R2=1.0*10**6\n",
+ "R1=5.6*10**6\n",
+ "Rd=4.7\n",
+ "\n",
+ "#Calculations\n",
+ "Vg=(Vdd*R2)/(R1+R2)\n",
+ "print(\"from the point where the bias line intersect the transfer curve\")\n",
+ "Id=6.2\n",
+ "Vds=Vdd-Id*Rd\n",
+ "\n",
+ "#Results\n",
+ "print('The value of Vds= %.2f V' %(Vds))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "from the point where the bias line intersect the transfer curve\n",
+ "The value of Vds= 10.86 V\n"
+ ]
+ }
+ ],
+ "prompt_number": 10
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.16, Page No 422"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "rDS=25.0\n",
+ "Vgsoff=10.0\n",
+ "Vds=200.0*10**-3\n",
+ "Vdd=12.0\n",
+ "\n",
+ "#Calculations\n",
+ "Id=Vds/rDS\n",
+ "Rd=Vdd/Id\n",
+ "Vi=-(Vgsoff+1)\n",
+ "\n",
+ "#Results\n",
+ "print('The value of Vi= %.2f V' %(Vi))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The value of Vi= -11.00 V\n"
+ ]
+ }
+ ],
+ "prompt_number": 11
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.17, Page No 424"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "\n",
+ "Vdd=50.0\n",
+ "Rd=10.0\n",
+ "R2=1.0*10**6\n",
+ "rDS=0.25\n",
+ "\n",
+ "#Calculations\n",
+ "Id=Vdd/Rd\n",
+ "print(\" from transfer curve at Id=5 and Vgs=5.7\")\n",
+ "Vgs=5.7\n",
+ "R1=((Vdd-Vgs)*R2)/Vgs#use 6.8Mohm to make Vgs>5.7V to ensure that the FET is biased on\n",
+ "Vds=Id*rDS\n",
+ "\n",
+ "#Results\n",
+ "print('The value of Vds= %.2f V' %(Vds))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " from transfer curve at Id=5 and Vgs=5.7\n",
+ "The value of Vds= 1.25 V\n"
+ ]
+ }
+ ],
+ "prompt_number": 12
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
\ No newline at end of file |