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{
"metadata": {
"name": "",
"signature": "sha256:22a4fbff9c8897e342a78bd9c8e48f9f093d2131b002f5667d92f4929ec8b5e4"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter14:Operational Amplifiers"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E1 - Pg 474"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Calculate voltage gain and input and output resistance\n",
"#given\n",
"R1=20.*10.**3.;#ohm\n",
"Rf=2000.*10.**3.;#ohm\n",
"Acl=-Rf/R1;\n",
"Ricl=R1;\n",
"Ro=0;\n",
"print '%s %.f %s' %(\"The voltage gain =\",Acl,\"\\n\");\n",
"print '%s %.f %s' %(\"The input resistance =\",R1/1000,\"kohm\\n\");\n",
"print '%s %.f %s' %(\"The output resistance =\",Ro,\"ohm\\n\");\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The voltage gain = -100 \n",
"\n",
"The input resistance = 20 kohm\n",
"\n",
"The output resistance = 0 ohm\n",
"\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E2 - Pg 474"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Find the output voltage\n",
"#given\n",
"R1=20.*10.**3.;#ohm\n",
"Rf=2000.*10.**3.;#ohm\n",
"v1=4.;#V\n",
"v2=3.8;#V\n",
"vo=v2*(1.+Rf/R1)-(Rf/R1)*v1;\n",
"print '%s %.1f %s' %(\"The output voltage =\",vo,\"V\");\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The output voltage = -16.2 V\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E4 - Pg 475"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Design an adder circuit using an op amp\n",
"#given\n",
"#Vo=-(V1+10*V2+100*V3)\n",
"Rf=100.*10.**3.;#ohm\n",
"C1=1.;#coefficient of V1\n",
"C2=10.;#coefficient of V2\n",
"C3=100.;#coefficient of V3\n",
"R1=Rf/C1;\n",
"R2=Rf/C2;\n",
"R3=Rf/C3;\n",
"print '%s %.f %s' %(\"R1 =\",R1/1000,\"kohm\\n\");\n",
"print '%s %.f %s' %(\"R2 =\",R2/1000,\"kohm\\n\");\n",
"print '%s %.f %s' %(\"R3 =\",R3/1000,\"kohm\\n\");\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"R1 = 100 kohm\n",
"\n",
"R2 = 10 kohm\n",
"\n",
"R3 = 1 kohm\n",
"\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E5 - Pg 484"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Calculate CMRR in dB\n",
"#given\n",
"import math\n",
"Ad=100.;#differential mode gain\n",
"Ac=0.01;#common mode gain\n",
"CMRR=20.*math.log10(Ad/Ac);\n",
"print '%s %.f %s' %(\"The CMRR in dB =\",CMRR,\"dB\");\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The CMRR in dB = 80 dB\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E6 - Pg 484"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Calculate the output voltage\n",
"#given\n",
"Ad=2000.;#differential mode gain\n",
"CMRR=10000.;\n",
"V1=10.**-3.;#V\n",
"V2=0.9*10.**-3.;#V\n",
"Vd=V1-V2;\n",
"Vc=(V1+V2)/2.;\n",
"Vo=Ad*Vd*(1.+Vc/(CMRR*Vd));\n",
"print '%s %.2f %s' %(\"The output voltage is =\",Vo*1000,\"mV\");\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The output voltage is = 200.19 mV\n"
]
}
],
"prompt_number": 5
}
],
"metadata": {}
}
]
}
|
