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| author | hardythe1 | 2015-06-03 15:27:17 +0530 |
|---|---|---|
| committer | hardythe1 | 2015-06-03 15:27:17 +0530 |
| commit | 47d7279a724246ef7aa0f5359cf417992ed04449 (patch) | |
| tree | c613e5e4813d846d24d67f46507a6a69d1a42d87 /Integrated_Electronics/Chapter13.ipynb | |
| parent | 435840cef00c596d9e608f9eb2d96f522ea8505a (diff) | |
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diff --git a/Integrated_Electronics/Chapter13.ipynb b/Integrated_Electronics/Chapter13.ipynb new file mode 100755 index 00000000..700328fd --- /dev/null +++ b/Integrated_Electronics/Chapter13.ipynb @@ -0,0 +1,752 @@ +{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 13 : Feedback Amplifier"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.1, Page No 481"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "Rs=0 #in V\n",
+ "hfe=50.0 #in K\n",
+ "hie=1.1 #in K\n",
+ "hre=0 #in K\n",
+ "hoe=0 #in K\n",
+ "\n",
+ "print('We first calculate the effective load Rl1 at the first calculator')\n",
+ "r1=10 #in K\n",
+ "r2=47 #in K\n",
+ "r3=33.0 #in K\n",
+ "r4=1+0.1 #in K\n",
+ "\n",
+ "#Calculations\n",
+ "Rl1=(r1*r2*r3*r4)/((r1*r2*r3)+(r1*r2*r4)+(r1*r3*r4)+(r2*r3*r4))\n",
+ "print(\"Rl1= %.2f K \" %Rl1)\n",
+ "\n",
+ "print('Similarly for 2nd Transistor')\n",
+ "R1=0.1 #in K\n",
+ "R2=4.7 #in K\n",
+ "Rc1=R1+R2\n",
+ "Rc2=4.7 #in K\n",
+ "\n",
+ "Rl2=(Rc1*Rc2)/(Rc1+Rc2)\n",
+ "print(\"Rl2= %.2f K\" %Rl2)\n",
+ "\n",
+ "\n",
+ "Re=(R1*R2)/(R1+R2)\n",
+ "\n",
+ "print('Voltage Gain of Transistor Q1')\n",
+ "Av1 = -(hfe*Rl1)/(hie+((1+hfe)*Re))\n",
+ "print(\"Av1= %.2f v \" %Av1)\n",
+ "\n",
+ "print('Voltage Gain of Transistor Q2')\n",
+ "Av2=-(hfe*Rl2)/hie\n",
+ "print(\"Av2= %.2f v \" %Av2)\n",
+ "print('Voltage Gain of two transistors in cascade without feedback')\n",
+ "Av=Av1*Av2\n",
+ "print(\"Av= %.2f v \" %Av)\n",
+ "\n",
+ "B=R1/(R1+R2)#beta which is feedback\n",
+ "D=1+(B*Av)\n",
+ "\n",
+ "Avf=Av/D\n",
+ "print(\"Avf= %.2f v \" %Avf)\n",
+ "\n",
+ "print('Input resistance without external feedback')\n",
+ "Ri=hie+(1+hfe)*Re\n",
+ "print(\"Ri= %.2f K \" %Ri)\n",
+ "\n",
+ "Rif=Ri*D\n",
+ "\n",
+ "#Results\n",
+ "print(\"Rif= %.2f K \" %Rif)\n",
+ "Ro=Rl2\n",
+ "Rof=Ro/D*1000\n",
+ "print(\"Rof= %.2f ohm\" %Rof)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "We first calculate the effective load Rl1 at the first calculator\n",
+ "Rl1= 0.94 K \n",
+ "Similarly for 2nd Transistor\n",
+ "Rl2= 2.37 K\n",
+ "Voltage Gain of Transistor Q1\n",
+ "Av1= -7.74 v \n",
+ "Voltage Gain of Transistor Q2\n",
+ "Av2= -107.94 v \n",
+ "Voltage Gain of two transistors in cascade without feedback\n",
+ "Av= 835.02 v \n",
+ "Avf= 45.39 v \n",
+ "Input resistance without external feedback\n",
+ "Ri= 6.09 K \n",
+ "Rif= 112.10 K \n",
+ "Rof= 129.09 ohm\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.2a, Page No 484"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "Gmf=-1 #Transconductance in mA/V\n",
+ "D=50.0 #Desensivity\n",
+ "Avf=-4 #Voltage Gain\n",
+ "Rs=1.0 #in K\n",
+ "hfe=150.0\n",
+ "Vt=0.026 #in V\n",
+ "\n",
+ "#Calculations\n",
+ "Gm=Gmf*D\n",
+ "print(\"Gm= %.2f mA/V \" %Gm)\n",
+ "\n",
+ "#B=-Re, D = 1+B*Gm = 1-B*Gm\n",
+ "Re=(1.0-D)/Gm #in K\n",
+ "\n",
+ "\n",
+ "#Results\n",
+ "print(\"Re= %.2f K \" %Re)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Gm= -50.00 mA/V \n",
+ "Re= 0.98 K \n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.2b Page No 484"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "Rc1=3#in K\n",
+ "Rc2=0.5#in K\n",
+ "Re=0.05#in K\n",
+ "Rs=1.2#in K\n",
+ "hfe=50.0\n",
+ "hie=1.1#in K\n",
+ "hre=0\n",
+ "hoe=0\n",
+ "\n",
+ "R=Rs\n",
+ "\n",
+ "#Calculations\n",
+ "#Ai=-Ic2/Is=-(Ic2/Ib2)*(Ib2/Ic1)*(Ic1/Ib1)*(Ib1/Is)\n",
+ "# -Ic2/Ib2 =- hfe = -50\n",
+ "# Ic1/Ib1 = hfe\n",
+ "#Let Ib2/Ic1 = k\n",
+ "Ri2= hie+((1+hfe)*(Re*R/(Re+R)))\n",
+ "k=-Rc1/(Rc1+Ri2)\n",
+ "\n",
+ "r= Rs*(Rs+Re)/(Rs+R+Re)\n",
+ "#Let Ib1/Is = l\n",
+ "l=r/(r+hie)\n",
+ "\n",
+ "Ai=(-hfe)*(k)*(hfe)*(l)\n",
+ "\n",
+ "B=Re/(Re+R)#beta\n",
+ "D=1+(B*Ai)\n",
+ "\n",
+ "Aif=Ai/D\n",
+ "\n",
+ "Avf=(Aif*Rc2)/Rs\n",
+ "\n",
+ "#To find Rif\n",
+ "\n",
+ "Ri=(r*hie)/(r+hie)\n",
+ "Rif=Ri/D\n",
+ "\n",
+ "#Results\n",
+ "print(\"The value of Rif= %.2f ohm \" %(Rif*1000))\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The value of Rif= 22.63 ohm \n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3.2c, Page No 484"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "Gmf=-1 #Transconductance in mA/V\n",
+ "D=50.0 #Desensivity\n",
+ "Avf=-4 #Voltage Gain\n",
+ "Rs=1.0 #in K\n",
+ "hfe=150.0 \n",
+ "Vt=0.026 #in V\n",
+ "Gm=Gmf*D\n",
+ "\n",
+ "#Calculations\n",
+ "#B=-Re, D = 1+B*Gm = 1-B*Gm\n",
+ "Re=(1-D)/Gm#in K\n",
+ "Rl=Avf/Gmf#in K\n",
+ "# Gm= -hfe/(Rs+hie+Re)\n",
+ "hie= -(hfe/Gm)-Rs-Re\n",
+ "Ri = Rs + hie +Re\n",
+ "Rif = Ri*D\n",
+ "\n",
+ "#Results\n",
+ "print(\"The value of Rif= %.2f K \" %Rif)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The value of Rif= 150.00 K \n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.2d Page No 484"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "Gmf=-1 #Transconductance in mA/V\n",
+ "D=50.0 #Desensivity\n",
+ "Avf=-4 #Voltage Gain\n",
+ "Rs=1.0 #in K\n",
+ "hfe=150.0 \n",
+ "Vt=0.026 #in V\n",
+ "Gm=Gmf*D\n",
+ "\n",
+ "#Calculations\n",
+ "#B=-Re, D = 1+B*Gm = 1-B*Gm\n",
+ "Re=(1-D)/Gm#in K\n",
+ "Rl=Avf/Gmf#in K\n",
+ "\n",
+ "# Gm= -hfe/(Rs+hie+Re)\n",
+ "hie= -(hfe/Gm)-Rs-Re\n",
+ "Ri = Rs + hie +Re\n",
+ "Rif = Ri*D\n",
+ "Ic=(hfe*Vt)/hie\n",
+ "\n",
+ "#Results\n",
+ "print(\"Quiscent Collector Current = %.2f mA \" %Ic)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Quiscent Collector Current = 3.82 mA \n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.3a Page No 489"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "Rc1=3#in K\n",
+ "Rc2=0.5#in K\n",
+ "Re=0.05#in K\n",
+ "Rs=1.2#in K\n",
+ "hfe=50.0\n",
+ "hie=1.1#in K\n",
+ "hre=0\n",
+ "hoe=0\n",
+ "R=Rs\n",
+ "\n",
+ "#Calculations\n",
+ "#Ai=-Ic2/Is=-(Ic2/Ib2)*(Ib2/Ic1)*(Ic1/Ib1)*(Ib1/Is)\n",
+ "# -Ic2/Ib2 =- hfe = -50\n",
+ "# Ic1/Ib1 = hfe\n",
+ "#Let Ib2/Ic1 = k\n",
+ "Ri2= hie + ((1+hfe)*(Re*R/(Re+R)))\n",
+ "k=-Rc1/(Rc1+Ri2)\n",
+ "r= Rs*(Rs+Re)/(Rs+R+Re)\n",
+ "#Let Ib1/Is = l\n",
+ "l=r/(r+hie)\n",
+ "Ai=(-hfe)*(k)*(hfe)*(l)\n",
+ "\n",
+ "print(\"The value of Ai = %.2f \" %Ai)\n",
+ "\n",
+ "B=Re/(Re+R)#beta\n",
+ "D=1+(B*Ai)\n",
+ "\n",
+ "Aif=Ai/D\n",
+ "print(\"The value of Aif = %.2f v \" %Aif)\n",
+ "\n",
+ "Avf=(Aif*Rc2)/Rs\n",
+ "\n",
+ "#Results\n",
+ "print(\"The value of Avf = %.2f v \" %Avf)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The value of Ai = 409.55 \n",
+ "The value of Aif = 23.56 v \n",
+ "The value of Avf = 9.82 v \n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.3b, Page No 489"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "Rc1=3.0 #in K\n",
+ "Rc2=0.5 #in K\n",
+ "Re=0.05 #in K\n",
+ "Rs=1.2 #in K\n",
+ "hfe=50.0 \n",
+ "hie=1.1 #in K\n",
+ "hre=0\n",
+ "hoe=0\n",
+ "R=Rs\n",
+ "\n",
+ "#Calculations\n",
+ "#Ai=-Ic2/Is=-(Ic2/Ib2)*(Ib2/Ic1)*(Ic1/Ib1)*(Ib1/Is)\n",
+ "# -Ic2/Ib2 =- hfe = -50\n",
+ "# Ic1/Ib1 = hfe\n",
+ "#Let Ib2/Ic1 = k\n",
+ "Ri2= hie + ((1+hfe)*(Re*R/(Re+R)))\n",
+ "k=-Rc1/(Rc1+Ri2)\n",
+ "r= Rs*(Rs+Re)/(Rs+R+Re)\n",
+ "#Let Ib1/Is = l\n",
+ "l=r/(r+hie)\n",
+ "Ai=(-hfe)*(k)*(hfe)*(l)\n",
+ "B=Re/(Re+R)#beta\n",
+ "D=1+(B*Ai)\n",
+ "Aif=Ai/D\n",
+ "Avf=(Aif*Rc2)/Rs\n",
+ "\n",
+ "#To find Rif\n",
+ "Ri=(r*hie)/(r+hie)\n",
+ "Rif=Ri/D\n",
+ "\n",
+ "#Results\n",
+ "print(\"The value of Rif = %.2f ohm \" %(Rif*1000))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The value of Rif = 22.63 ohm \n"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.3c Page No 489"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math \n",
+ "\n",
+ "#initialisation of variables\n",
+ "Rc1=3.0 #in K\n",
+ "Rc2=0.5 #in K\n",
+ "Re=0.05 #in K\n",
+ "Rs=1.2 #in K\n",
+ "hfe=50.0 \n",
+ "hie=1.1 #in K\n",
+ "hre=0\n",
+ "hoe=0\n",
+ "R=Rs\n",
+ "\n",
+ "#Calculations\n",
+ "#Ai=-Ic2/Is=-(Ic2/Ib2)*(Ib2/Ic1)*(Ic1/Ib1)*(Ib1/Is)\n",
+ "# -Ic2/Ib2 =- hfe = -50\n",
+ "# Ic1/Ib1 = hfe\n",
+ "#Let Ib2/Ic1 = k\n",
+ "Ri2= hie + ((1+hfe)*(Re*R/(Re+R)))\n",
+ "k=-Rc1/(Rc1+Ri2)\n",
+ "\n",
+ "r= Rs*(Rs+Re)/(Rs+R+Re)\n",
+ "#Let Ib1/Is = l\n",
+ "l=r/(r+hie)\n",
+ "\n",
+ "Ai=(-hfe)*(k)*(hfe)*(l)\n",
+ "\n",
+ "B=Re/(Re+R)#beta\n",
+ "D=1+(B*Ai)\n",
+ "\n",
+ "Aif=Ai/D\n",
+ "\n",
+ "Avf=(Aif*Rc2)/Rs\n",
+ "\n",
+ "Ri=(r*hie)/(r+hie)\n",
+ "Rif=Ri/D\n",
+ "\n",
+ "rif=(Rif*Rs)/(Rs-Rif)\n",
+ "\n",
+ "#Results\n",
+ "print(\"Resistance with feedback seen by voltage source is %.2f K \" %(rif+Rs))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Resistance with feedback seen by voltage source is 1.22 K \n"
+ ]
+ }
+ ],
+ "prompt_number": 8
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.3d Page No 489"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "Rc1=3.0 #in K\n",
+ "Rc2=0.5 #in K\n",
+ "Re=0.05 #in K\n",
+ "Rs=1.2 #in K\n",
+ "hfe=50.0\n",
+ "hie=1.1 #in K\n",
+ "hre=0\n",
+ "hoe=0\n",
+ "R=Rs\n",
+ "\n",
+ "#Calculations\n",
+ "#Ai=-Ic2/Is=-(Ic2/Ib2)*(Ib2/Ic1)*(Ic1/Ib1)*(Ib1/Is)\n",
+ "# -Ic2/Ib2 =- hfe = -50\n",
+ "# Ic1/Ib1 = hfe\n",
+ "#Let Ib2/Ic1 = k\n",
+ "Ri2= hie + ((1+hfe)*(Re*R/(Re+R)))\n",
+ "k=-Rc1/(Rc1+Ri2)\n",
+ "r= Rs*(Rs+Re)/(Rs+R+Re)\n",
+ "#Let Ib1/Is = l\n",
+ "l=r/(r+hie)\n",
+ "Ai=(-hfe)*(k)*(hfe)*(l)\n",
+ "B=Re/(Re+R)#beta\n",
+ "D=1+(B*Ai)\n",
+ "\n",
+ "Aif=Ai/D\n",
+ "Avf=(Aif*Rc2)/Rs\n",
+ "Rof=(Avf*Rs)/Aif\n",
+ "\n",
+ "#Results\n",
+ "print(\"Output Resistance = %.2f K \" %Rof)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Output Resistance = 0.50 K \n"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.4a Page No 494"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "Rc=4#in K\n",
+ "r=40#in K\n",
+ "Rs=10#in K\n",
+ "hie=1.1#in K\n",
+ "hfe=50\n",
+ "hre=0\n",
+ "hoe=0\n",
+ "\n",
+ "#Calculations\n",
+ "#Required Formulae\n",
+ "rc=(Rc*r)/(Rc+r)\n",
+ "R=(Rs*r)/(Rs+r)\n",
+ "Rm=-(hfe*rc*R)/(R+hie)\n",
+ "print(\"The value of Rm = %.2f K \" %Rm)\n",
+ "B=-1/r#in mA/V\n",
+ "D=1+(B*Rm)\n",
+ "Rmf=Rm/D\n",
+ "#Avf = Vo/Vs = Vo/(Is*Rs) = Rmf/Rs\n",
+ "Avf=Rmf/Rs\n",
+ "\n",
+ "#Results\n",
+ "print(\"The value of Avf = %.2f v \" %Avf)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The value of Rm = -131.87 K \n",
+ "The value of Avf = -0.10 v \n"
+ ]
+ }
+ ],
+ "prompt_number": 10
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.4b , Page No 494"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "\n",
+ "Rc=4.0 #in K\n",
+ "r=40.0 #in K\n",
+ "Rs=10.0 #in K\n",
+ "hie=1.1 #in K\n",
+ "hfe=50.0\n",
+ "hre=0\n",
+ "hoe=0\n",
+ "\n",
+ "#Calculations\n",
+ "#Required Formulae\n",
+ "rc=(Rc*r)/(Rc+r)\n",
+ "R=(Rs*r)/(Rs+r)\n",
+ "Rm=-(hfe*rc*R)/(R+hie)\n",
+ "B=-1.0/r#in mA/V\n",
+ "D=1+(B*Rm)\n",
+ "Rmf=Rm/D\n",
+ "#Avf = Vo/Vs = Vo/(Is*Rs) = Rmf/Rs\n",
+ "Avf=Rmf/Rs\n",
+ "Ri = (R*hie)/(R+hie)\n",
+ "Rif=Ri/D\n",
+ "\n",
+ "#Results\n",
+ "print(\"The value of Rif = %.2f v \" %Rif)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The value of Rif = 0.19 v \n"
+ ]
+ }
+ ],
+ "prompt_number": 11
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.4c, Page No 494"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "Rc=4.0 #in K\n",
+ "r=40.0 #in K\n",
+ "Rs=10.0 #in K\n",
+ "hie=1.1 #in K\n",
+ "hfe=50.0\n",
+ "hre=0\n",
+ "hoe=0\n",
+ "\n",
+ "#Calculations\n",
+ "#Required Formulae\n",
+ "rc=(Rc*r)/(Rc+r)\n",
+ "R=(Rs*r)/(Rs+r)\n",
+ "Rm=-(hfe*rc*R)/(R+hie)\n",
+ "\n",
+ "print(\"The value of Rm = %.2f v \" %Rm)\n",
+ "B=-1/r#in mA/V\n",
+ "D=1+(B*Rm)\n",
+ "Rmf=Rm/D\n",
+ "#Avf = Vo/Vs = Vo/(Is*Rs) = Rmf/Rs\n",
+ "Avf=Rmf/Rs\n",
+ "Ri = (R*hie)/(R+hie)\n",
+ "Rif=Ri/D\n",
+ "\n",
+ "#If the input resistance looking to the right of Rs is rif then Rif=(rif*Rs)/(rif+Rs)\n",
+ "rif=(Rif*Rs)/(Rs-Rif)\n",
+ "\n",
+ "print(\"The impedence seen by the voltage source=Rif = %.2f K \" %(Rs+rif))\n",
+ "Ro=40.0 #in K\n",
+ "r=40.0 #in K\n",
+ "Rm = -(hfe*r*R)/(R+hie)\n",
+ "Rof=Ro/(1+(B*Rm))\n",
+ "#We are writting Rof' = rof\n",
+ "rof=(Rof*Rc)/(Rof+Rc)\n",
+ "\n",
+ "#Results\n",
+ "print(\"The value of rof = %.2f K \" %rof)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The value of Rm = -159.84 v \n",
+ "The impedence seen by the voltage source=Rif = 10.20 K \n",
+ "The value of rof = 0.73 K \n"
+ ]
+ }
+ ],
+ "prompt_number": 12
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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