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{
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"name": "",
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 34 , Time Base Circuits"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 34.1, Page Number 883"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#Variables\n",
"\n",
"R = 100.0 * 10**3 #Resistance (in ohm)\n",
"C = 0.4 * 10**-6 #Capacitance (in Farad)\n",
"n = 0.57 #Ratio of peak-peak voltage to the supply voltage \n",
"\n",
"#Calculation\n",
"\n",
"f = 1 / (2.3 * R * C * math.log10(1/(1-n))) #Frequency (in Hertz) \n",
"\n",
"#Result\n",
"\n",
"print \"Frequency of sweep is \",round(f,2),\" Hz.\"\n",
"\n",
"#Slight variation due to higher precision."
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Frequency of sweep is 29.66 Hz.\n"
]
}
],
"prompt_number": 16
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 34.2 , Page Number 883"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#Variables\n",
"\n",
"n = 0.62 #Ratio of peak-peak voltage to the supply voltage \n",
"R = 5.0 * 10**3 #Resistance (in ohm)\n",
"C = 0.05 * 10**-6 #Capacitor (in Farad)\n",
"\n",
"#Calculation\n",
"\n",
"T = 2.3 * R * C * math.log10(1/(1-n)) #Time period of oscillation (in seconds)\n",
"f = 1/T #Frequency of oscillation (in Hertz) \n",
"f1 = 50.0 #New frequency (in Hertz)\n",
"T1 = 1/f1 #New time period of oscillation (in seconds)\n",
"R1 = T1 / (2.3 * C * math.log10(1/(1-n))) #New Resistance (in ohm)\n",
"f2 = 50.0 #Another new frequency (in Hertz)\n",
"C2 = 0.5 * 10**-6 #Capacitance (in Farad) \n",
"T2 = 1/f2 #Another new time period (in seconds)\n",
"R2 = T2 / (2.3 * C2 * math.log10(1/(1-n))) #New Resistance (in ohm)\n",
"\n",
"#Result\n",
"\n",
"print \"The time period and frequency of oscillation in case 1 is \",round(T * 10**3,2),\" ms and \",round(f),\" Hz.\"\n",
"print \"New value of R is \",round(R1 * 10**-3),\" kilo-ohm.\"\n",
"print \"Value of R with C is 0.5 micro-Farad is \",round(R2 * 10**-3,1),\" kilo-ohm.\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The time period and frequency of oscillation in case 1 is 0.24 ms and 4139.0 Hz.\n",
"New value of R is 414.0 kilo-ohm.\n",
"Value of R with C is 0.5 micro-Farad is 41.4 kilo-ohm.\n"
]
}
],
"prompt_number": 17
}
],
"metadata": {}
}
]
}
|
