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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"#Chapter 9 , Regulated Power Supplies"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"##Example 9.1 , Page Number 328"
]
},
{
"cell_type": "code",
"execution_count": 3,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Breakdown voltage : 8.0 V.\n",
"Resistor R : 206.0 ohm.\n"
]
}
],
"source": [
"#Variables\n",
"\n",
"IC = IL = 1.2 #Collector current (in Ampere)\n",
"Vout = 7.5 #Voltage (in volts)\n",
"VBE = 0.5 #Base-emitter voltage (in volts)\n",
"beta = 50.0 #Current gain\n",
"VCC = 15.0 #Supply voltage (in volts) \n",
"IZmin = 10.0 * 10**-3 #Minimum zener current (in Ampere) \n",
"\n",
"#Calculation\n",
"\n",
"IB = IC/beta #Base current (in Ampere)\n",
"VZ = Vout + VBE #Zener diode breakdown voltage (in volts)\n",
"VR = VCC - VZ #Voltage drop in resistor R (in volts)\n",
"IR = IB + IZmin #Current through R (in AMpere) \n",
"R = VR/IR #Resistance R (in ohm)\n",
"\n",
"#Result\n",
"\n",
"print \"Breakdown voltage : \",VZ,\"V.\\nResistor R : \",round(R),\"ohm.\""
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"##Example 9.2 , Page Number 328"
]
},
{
"cell_type": "code",
"execution_count": 4,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Breakdown voltage : 9.6 V.\n",
"Series Resistor RSE : 37.5 ohm.\n"
]
}
],
"source": [
"#Variables\n",
"\n",
"Vout = 10 #Output voltage (in volts)\n",
"VBE = 0.4 #Base-emitter voltage (in volts)\n",
"IL = 100.0 * 10**-3 #Load current (in Ampere)\n",
"Vinmin = 11.25 #Min. input voltage (in volts)\n",
"Vinmax = 13.75 #Max. input voltage (in volts)\n",
"\n",
"#Calculation\n",
"\n",
"VZ = Vout - VBE #Zener breakdown voltage (in volts)\n",
"VRSE = Vinmax - Vout #Max. voltage drop in series resistor (in volts)\n",
"Imax = IL #Series resistor current (in Ampere)\n",
"RSE = VRSE/Imax #Series resistor (in ohm)\n",
"\n",
"#Result\n",
"\n",
"print \"Breakdown voltage : \",VZ,\"V.\\nSeries Resistor RSE : \",round(RSE,1),\"ohm.\""
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 2",
"language": "python",
"name": "python2"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
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},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython2",
"version": "2.7.10"
}
},
"nbformat": 4,
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}
|
