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{
"metadata": {
"name": "",
"signature": "sha256:9283b3273e4b25859b1f947b0b70d061842802ddcf82b087896def4a57fa123c"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h1>Chapter 1: Semiconductor Basics<h1>"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 1.1(a), Page Number:29<h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"\n",
"# variable declaration\n",
"V_bias=10.0; #bias voltage in volt\n",
"R_limit=1000; #limiting resistance in ohm\n",
"r_d =10.0; #r_d value\n",
"\n",
"#calculation\n",
"#IDEAL MODEL\n",
"print \"IDEAL MODEL\"\n",
"V_f=0; #voltage in volt\n",
"I_f=V_bias/R_limit; #foward current\n",
"V_R_limit=I_f*R_limit; #limiting voltage\n",
"print \"forward voltage = %.2f volts\" %V_f\n",
"print \"forward current = %.2f amperes\" %I_f\n",
"print \"voltage across limiting resistor = %.2f volts\" %V_R_limit\n",
"\n",
"#PRACTICAL MODEL\n",
"print \"\\nPRACTICAL MODEL\"\n",
"V_f=0.7; #voltage in volt\n",
"I_f=(V_bias-V_f)/R_limit; #foward current\n",
"V_R_limit=I_f*R_limit; #limiting voltage\n",
"print \"forward voltage = %.2f volts\" %V_f\n",
"print \"forward current = %.3f amperes\" %I_f\n",
"print \"voltage across limiting resistor = %.2f volts\" %V_R_limit\n",
"\n",
"#COMPLETE MODEL\n",
"print \"\\nCOMPLETE MODEL\"\n",
"I_f=(V_bias-0.7)/(R_limit+r_d); #foward current\n",
"V_f=0.7+I_f*r_d; #forward voltage\n",
"V_R_limit=I_f*R_limit; #limiting voltage\n",
"print \"forward voltage = %.3f volts\" %V_f\n",
"print \"forward current = %.3f amperes\" %I_f\n",
"print \"voltage across limiting resistor = %.2f volts\" %V_R_limit"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"IDEAL MODEL\n",
"forward voltage = 0.00 volts\n",
"forward current = 0.01 amperes\n",
"voltage across limiting resistor = 10.00 volts\n",
"\n",
"PRACTICAL MODEL\n",
"forward voltage = 0.70 volts\n",
"forward current = 0.009 amperes\n",
"voltage across limiting resistor = 9.30 volts\n",
"\n",
"COMPLETE MODEL\n",
"forward voltage = 0.792 volts\n",
"forward current = 0.009 amperes\n",
"voltage across limiting resistor = 9.21 volts"
]
}
],
"prompt_number": 1
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 1.1(b), Page Number:29<h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"# variable declaration\n",
"V_bias=5; #bias voltage in volt\n",
"I_R=1*10**-6; #current\n",
"R_limit=1000 #in Ohm\n",
"\n",
"#calculation\n",
"#IDEAL MODEL\n",
"print \"IDEAL MODEL\"\n",
"I_r=0.0; #current in ampere\n",
"V_R=V_bias; #voltages are equal\n",
"V_R_limit=I_r*R_limit; #limiting voltage\n",
"print \"Reverse voltage across diode = %.2f volts\" %V_R\n",
"print \"Reverse current through diode= %.2f amperes\" %I_r\n",
"print \"voltage across limiting resistor = %.2f volts\" %V_R_limit\n",
"\n",
"#PRACTICAL MODEL\n",
"print \"\\nPRACTICAL MODEL\"\n",
"I_r=0.0; #current in ampere\n",
"V_R=V_bias; #voltages are equal\n",
"V_R_limit=I_r*R_limit; #limiting voltage\n",
"print \"Reverse voltage across diode= %.2f volts\" %V_R\n",
"print \"Reverse current through diode = %.2f amperes\" %I_r\n",
"print \"voltage across limiting resistor = %.2f volts\" %V_R_limit\n",
"\n",
"#COMPLETE MODEL\n",
"print \"\\nCOMPLETE MODEL\"\n",
"I_r=I_R; #current in ampere\n",
"V_R_limit=I_r*R_limit; #limiting voltage\n",
"V_R=V_bias-V_R_limit; #voltage in volt\n",
"print \"Reverse voltage across diode = %.3f volts\" %V_R\n",
"print \"Reverse current through diode = %d micro Amp\" %(I_r*10**6)\n",
"print \"voltage across limiting resistor = %d mV\" %(V_R_limit*1000)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"IDEAL MODEL\n",
"Reverse voltage across diode = 5.00 volts\n",
"Reverse current through diode= 0.00 amperes\n",
"voltage across limiting resistor = 0.00 volts\n",
"\n",
"PRACTICAL MODEL\n",
"Reverse voltage across diode= 5.00 volts\n",
"Reverse current through diode = 0.00 amperes\n",
"voltage across limiting resistor = 0.00 volts\n",
"\n",
"COMPLETE MODEL\n",
"Reverse voltage across diode = 4.999 volts\n",
"Reverse current through diode = 1 micro Amp\n",
"voltage across limiting resistor = 1 mV"
]
}
],
"prompt_number": 2
}
],
"metadata": {}
}
]
}
|
