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{
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"name": "Preeti",
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"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 1 : Operational Amplifiers"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Exa 1.1 : page 11"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Given data\n",
"G= -100.0 # Gain\n",
"R1= 2.2 # in kohm\n",
"R1=R1*10**3 # in ohm\n",
"# Formula G=-Rf/R1\n",
"Rf= -G*R1 # ohm\n",
"Rf*= 10**-3 # kohm\n",
"print \"The value of Rf is %d kohm\" %Rf"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The value of Rf is 220 kohm\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Exa 1.2 : page 11"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Given data\n",
"Rf= 200 # in kohm\n",
"R1= 2 # in kohm\n",
"vin=2.5 # in mV\n",
"vin=vin*10**-3 # in volt\n",
"G= -Rf/R1 \n",
"vo= G*vin # in V\n",
"print \"The output voltage is %0.2f volt\" %vo"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The output voltage is -0.25 volt\n"
]
}
],
"prompt_number": 8
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Exa 1.3 : page 12"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Given data\n",
"G=-10.0 \n",
"Ri= 100.0 # in kohm\n",
"R1= Ri # in kohm\n",
"R1=R1*10**3 # in ohm\n",
"R1*= 10**-3 # kohm\n",
"# Formula G=-R2/R1\n",
"R2= R1*abs(G) # ohm\n",
"R2*= 10**-3 # Mohm\n",
"print \"Value of R1 is %0.2f kohm\" %R1\n",
"print \"and value of R2 is %0.2f Mohm\" %R2"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Value of R1 is 100.00 kohm\n",
"and value of R2 is 1.00 Mohm\n"
]
}
],
"prompt_number": 16
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Exa 1.4 : page 37"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Given data\n",
"R1= 100.0 # in kohm\n",
"R2= 500 # in kohm\n",
"V1= 2.0 # in volt\n",
"Vo= (1+R2/R1)*V1 # in volt\n",
"print \"Output voltage for noninverting amplifier is %0.2f volt\" %Vo"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Output voltage for noninverting amplifier is 12.00 volt\n"
]
}
],
"prompt_number": 19
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Exa 1.5 : page 38"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Given data\n",
"Rf= 1 # in Mohm\n",
"Rf=Rf*10**6 #in ohm\n",
"\n",
"# Part(a)\n",
"V1=1.0 #in volt\n",
"V2=2.0 #in volt\n",
"V3=3.0 #in volt\n",
"R1= 500.0 # in kohm\n",
"R1=R1*10**3 #in ohm\n",
"R2= 1 # in Mohm\n",
"R2=R2*10**6 #in ohm\n",
"R3= 1.0 # in Mohm\n",
"R3=R3*10**6 #in ohm\n",
"Vo= -Rf*(V1/R1+V2/R2+V3/R3) # in volt\n",
"print \"(a) Output voltage is %0.2f volt\" %Vo\n",
"\n",
"# Part(b)\n",
"V1=-2.0 #in volt\n",
"V2=3.0 #in volt\n",
"V3=1.0 #in volt\n",
"R1= 200.0 # in kohm\n",
"R1=R1*10**3 #in ohm\n",
"R2= 500.0 # in kohm\n",
"R2=R2*10**3 #in ohm\n",
"R3= 1.0 # in Mohm\n",
"R3=R3*10**6 #in ohm\n",
"Vo= -Rf*(V1/R1+V2/R2+V3/R3) # in volt\n",
"print \"(b) Output voltage is %0.2f volt\" %Vo"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"(a) Output voltage is -7.00 volt\n",
"(b) Output voltage is 3.00 volt\n"
]
}
],
"prompt_number": 22
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Exa 1.6 : page 38"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Given data\n",
"print \"Minimum closed loop voltage gain for R2=0 and R1= 2 kohm is \"\n",
"R2=0 \n",
"R1=2.0 # in kohm\n",
"R1=R1*10**3 # in ohm\n",
"Av_min= (1+R2/R1)\n",
"print Av_min\n",
"\n",
"print \"Maximum closed loop voltage gain for maximum value of R2=100 kohm and R1= 2 kohm is\"\n",
"R2=100 # in kohm\n",
"R1=2 # in kohm\n",
"Av_max= (1+R2/R1)\n",
"print Av_max "
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Minimum closed loop voltage gain for R2=0 and R1= 2 kohm is \n",
"1.0\n",
"Maximum closed loop voltage gain for maximum value of R2=100 kohm and R1= 2 kohm is\n",
"51\n"
]
}
],
"prompt_number": 26
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Exa 1.7 : page 39"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Given data\n",
"V1= 745 # in \u00b5V\n",
"V2= 740 # in \u00b5V\n",
"V1=V1*10**-6 # in volt\n",
"V2=V2*10**-6 # in volt\n",
"CMRR=80 # in dB\n",
"Av=5*10**5 \n",
"# (i)\n",
"# CMRR in dB= 20*log(Ad/Ac)\n",
"Ad=Av \n",
"Ac= Ad/10**(CMRR/20) \n",
"# (ii)\n",
"Vo= Ad*(V1-V2)+Ac*(V1+V2)/2 \n",
"print \"Output voltage is %0.2f volt\" %Vo"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Output voltage is 2.54 volt\n"
]
}
],
"prompt_number": 27
}
],
"metadata": {}
}
]
}
|
