{
"metadata": {
"name": "",
"signature": "sha256:3b07252198e90cfd9ac3c1a323508af3c3781f3c224f206ef55b7d5cdbd305fc"
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 1: Semiconductor Diodes"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 1.1(a), Page No.: 29"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#Variable Declaration\n",
"V=0.5 #voltage of diode in V\n",
"I=2 #current of diode in mA\n",
"\n",
"#Calculation\n",
"R=(V/I)*1000 #resistance of diode,\n",
" #converting current in Ampere from mA in calculation\n",
"\n",
"#Result\n",
"print \"Resistance is \", R ,\"ohm\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Resistance is 250.0 ohm\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 1.1(b), Page No.: 29"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#Variable Declaration\n",
"V=0.8 #voltage of diode in V\n",
"I=20 #current of diode in mA\n",
"\n",
"#Calculation\n",
"R=(V/I)*1000 #resistance of diode,\n",
" #converting current in Ampere from mA in calculation\n",
"\n",
"#Result\n",
"print \"Resistance is \", R ,\"ohm\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Resistance is 40.0 ohm\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 1.1(c), Page No.:29"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#Variable Declaration\n",
"V= -10 #voltage of diode in V\n",
"I= -1 #current of diode in microAmpere\n",
"\n",
"#Calculation\n",
"R=(V/I)*1000*1000 #resistance of diode,\n",
" #converting current in Ampere from microAmpere in calculation\n",
"R=V/I*(1000/1000)*(1000/1000)#converting ohm into Mega-ohm \n",
"#Result\n",
"print \"Resistance is \", R ,\"Mega-ohm\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Resistance is 10 Mega-ohm\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 1.2(a), Page NO.:31"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#Variable Declaration\n",
"I=2 #diode current in mA\n",
"I1=4 #diode current choosen by 2 mA swing above given diode current of 2 mA.\n",
"I2=0 #diode current choosen by 2 mA swing below given diode current of 2 mA.\n",
"V1=0.76 #diode voltage at I1= 4 mA.\n",
"V2=0.65 #diode voltage at I2= 0 mA.\n",
"\n",
"#Calculation\n",
"\n",
"R=((V1-V2)/(I1-I2))*1000 #R is AC resistance,\n",
" #V1-V2 is change in voltage and I1-I2 is chnage in current.\n",
" #multiplying by 1000 for converting current into A from mA.\n",
"#RESULT\n",
"print \"Ac resistance is\",R,\"ohm\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Ac resistance is 27.5 ohm\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 1.2(b),Page No.:31"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#Variable Declaration\n",
"I=25 #diode current in mA\n",
"I1=30 #diode current choosen by 5 mA swing above given diode current of 25 mA.\n",
"I2=20 #diode current choosen by 5 mA swing below given diode current of 25 mA.\n",
"V1=0.8 #diode voltage at I1= 30 mA.\n",
"V2=0.78 #diode voltage at I2= 20 mA.\n",
"\n",
"#Calculation\n",
"\n",
"R=((V1-V2)/(I1-I2))*1000 #R is AC resistance,\n",
" #V1-V2 is change in voltage and I1-I2 is chnage in current.\n",
" #multiplying by 1000 for converting current into A from mA.\n",
"#RESULT\n",
"print \"Ac resistance is\",R,\"ohm\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Ac resistance is 2.0 ohm\n"
]
}
],
"prompt_number": 6
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 1.2(c), Page No.:32"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#Variable Declaration\n",
"\n",
"I1=2 #diode current in mA. \n",
"V1=0.7 #diode voltage in V.\n",
"\n",
"I2=25 #diode current in mA.\n",
"V2=0.79 #diode voltage in V.\n",
"\n",
"\n",
"#Calculation\n",
"\n",
"R1=(V1/I1)*1000 #R1 is DC resistance, \n",
" #multiplying by 1000 for converting current into A from mA.\n",
"\n",
"R2=(V2/I2)*1000 #R2 is DC rresistance \n",
" #mulipying by 1000 for converting current into A from mA.\n",
"\n",
"#RESULT\n",
"print \"Dc resistance at 2 mA is\",R1,\"ohm, which far exceeds AC resistance of 27.5 ohm\"\n",
"\n",
"print \"DC resistance at 25 mA is\",R2,\"ohm, which far exceeds AC resistance of 2 ohm\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Dc resistance at 2 mA is 350.0 ohm, which far exceeds AC resistance of 27.5 ohm\n",
"DC resistance at 25 mA is 31.6 ohm, which far exceeds AC resistance of 2 ohm\n"
]
}
],
"prompt_number": 9
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 1.3, Page No.: 48-49"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#Variable Declaration\n",
"\n",
"V=10 #zener voltage in V.\n",
"T=0.072 #Temperature coefficient.\n",
"T1=100 #given temperature in celsius.\n",
"To=25 #reference temperature in celsius\n",
"\n",
"#calculation\n",
"\n",
"V1=(T*V*(T1-To))/100 #nominal voltage for zener diode in V.\n",
"\n",
" #Temperature coefficient is positive.\n",
" #new zener voltage is defined by V2.\n",
"V2=V+V1\n",
"\n",
"#RESULT\n",
"\n",
"print \"Voltage for zener diode is\",V2,\"V\"\n",
"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Voltage for zener diode is 10.54 V\n"
]
}
],
"prompt_number": 12
}
],
"metadata": {}
}
]
}