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{
"metadata": {
"name": "",
"signature": "sha256:f3203bf7786c39de89c39055969e5210f4d6ecee2a5994233cbc07ff50437a9b"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter12:Sinusoidal Oscillators"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E1 - Pg 423"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Calculate frequency of oscillations\n",
"#given\n",
"import math\n",
"L=55.*10.**-6.;#H\n",
"C=300.*10.**-12.;#F\n",
"fo=1./(2.*math.pi*math.sqrt(L*C));\n",
"print '%s %.f %s' %(\"The frequency of oscillations =\",fo/1000,\"kHz\\n\");\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The frequency of oscillations = 1239 kHz\n",
"\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E2 - Pg 425"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Calculate frequency of oscillations and feedback factor and voltage gain\n",
"#given\n",
"def prll(r1,r2):\n",
"\tz=r1*r2/(r1+r2)#\n",
"\treturn z\n",
"import math\n",
"C1=0.001*10.**-6.;#F\n",
"C2=0.01*10.**-6.;#F\n",
"L=15.*10.**-6.;#H\n",
"C=prll(C1,C2);\n",
"fo=1./(2.*math.pi*math.sqrt(L*C));\n",
"print '%s %.2f %s' %(\"The frequency of oscillations =\",fo/10**6,\"MHz\\n\");\n",
"B=C1/C2;\n",
"Amin=1./B;\n",
"print '%s %.1f %s' %(\"The feedback factor of the circuit =\",B,\"\\n\");\n",
"print '%s %.f' %(\"The circuit needs a minimum voltage gain of\",Amin);\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The frequency of oscillations = 1.36 MHz\n",
"\n",
"The feedback factor of the circuit = 0.1 \n",
"\n",
"The circuit needs a minimum voltage gain of 10\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E3 - Pg 432"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Calculate frequency of oscillations\n",
"#given\n",
"import math\n",
"R=10.*10.**3.;#ohm\n",
"C=0.01*10.**-6.;#F\n",
"fo=1./(2.*math.pi*R*C*math.sqrt(6.));\n",
"print '%s %.1f %s' %(\"The frequency of oscillations =\",fo,\"Hz\\n\");\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The frequency of oscillations = 649.7 Hz\n",
"\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E4 - Pg 432"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Calculate frequency of oscillations\n",
"#given\n",
"import math\n",
"R=22.*10.**3.;#ohm\n",
"C=100.*10.**-12.;#F\n",
"fo=1./(2.*math.pi*R*C);\n",
"print '%s %.2f %s' %(\"The frequency of oscillations =\",fo/1000,\"KHz\\n\");\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The frequency of oscillations = 72.34 KHz\n",
"\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E5 - Pg 434"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Determine the series and parallel resonant frequencies\n",
"#given\n",
"def prll(r1,r2):\n",
"\tz=r1*r2/(r1+r2)#\n",
"\treturn z\n",
"import math\n",
"L=3.;#H\n",
"Cm=10.*10.**-12.;#F\n",
"Cs=0.05*10.**-12.;#F\n",
"fs=1./(2.*math.pi*math.sqrt(L*Cs));\n",
"print '%s %.f %s' %(\"The series resonant frequency =\",fs/1000,\"kHz\\n\");\n",
"\n",
"Cp=prll(Cm,Cs);\n",
"fp=1./(2.*math.pi*math.sqrt(L*Cp));\n",
"print '%s %.f %s' %(\"The parallel resonant frequency =\",fp/1000,\"kHz\");\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The series resonant frequency = 411 kHz\n",
"\n",
"The parallel resonant frequency = 412 kHz\n"
]
}
],
"prompt_number": 5
}
],
"metadata": {}
}
]
}
|
