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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Chapter 21: Bipolar Transistors"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 21.1, Page 445"
]
},
{
"cell_type": "code",
"execution_count": 5,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Output Current, I = 2.04 mA\n",
"Output Voltage, V = 4.5 V\n"
]
}
],
"source": [
"import math\n",
"#Initialization\n",
"vcc=10 #voltage\n",
"vbe=0.7 #voltage, base-to-emitter junction\n",
"rb=910*10**3 #resistance in ohm\n",
"hfe=200\n",
"rc=2.7*10**3 #resistance in ohm\n",
"\n",
"#Calculation\n",
"ib=(vcc-vbe)/rb #base current in ampere\n",
"ic=hfe*ib #collector in current in ampere\n",
"vo=vcc-(ic*rc) #output voltage\n",
"\n",
"#Result\n",
"print'Output Current, I = %.2f mA'%(ic*10**3)\n",
"print'Output Voltage, V = %.1f V'%vo"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 21.2, Page 445"
]
},
{
"cell_type": "code",
"execution_count": 25,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Quiescent Output Voltage, V = 5.6 V\n"
]
}
],
"source": [
"import math\n",
"#Initialization\n",
"vcc=10 #voltage\n",
"r2=10*10**3 #resistance in ohm\n",
"r1=27*10**3 #resistance in ohm\n",
"vbe=0.7 #voltage, base-to-emitter junction\n",
"re=10**3 #resistance in ohm\n",
"rc=2.2*10**3 #resistance in ohm\n",
"\n",
"#Calculation\n",
"vb=vcc*(r2*(r1+r2)**-1) # base voltage\n",
"ve=vb-vbe #emitter voltage\n",
"ie=ve/re #emitter current\n",
"ic=ie #collector current\n",
"vo=vcc-(ic*rc) #output voltage\n",
"\n",
"#Result\n",
"print'Quiescent Output Voltage, V = %.1f V'%vo\n"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 21.3, Page 448"
]
},
{
"cell_type": "code",
"execution_count": 16,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Voltage Gain = -2.2 mA\n"
]
}
],
"source": [
"import math\n",
"#Initialization\n",
"re=10**3 #resistance in ohm\n",
"rc=2.2*10**3 #resistance in ohm\n",
"\n",
"#Calculation\n",
"gain=-rc/re #voltage gain\n",
"\n",
"#Result\n",
"print'Voltage Gain = %.1f mA'%gain\n"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 21.4, Page 451"
]
},
{
"cell_type": "code",
"execution_count": 20,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Voltage Gain = 64 Hz\n"
]
}
],
"source": [
"import math\n",
"#Initialization\n",
"r1=15*10**3 #resistance in ohm\n",
"r2=47*10**3 #resistance in ohm\n",
"C=220*10**-9 #capacitance in farad\n",
"\n",
"#Calculation\n",
"ri=(r1*r2)/(r1+r2) #resistance in paraller\n",
"fco=1/(2*math.pi*C*ri) #frequency in Hz\n",
"\n",
"\n",
"#Result\n",
"print'Voltage Gain = %d Hz'%round(fco)\n"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 21.5, Page 453"
]
},
{
"cell_type": "code",
"execution_count": 26,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Quiescent Output Voltage, V = 2.0 V\n"
]
}
],
"source": [
"import math\n",
"#Initialization\n",
"vcc=10 #voltage\n",
"r2=10*10**3 #resistance in ohm\n",
"r1=27*10**3 #resistance in ohm\n",
"vbe=0.7 #voltage, base-to-emitter junction\n",
"re=10**3 #resistance in ohm\n",
"rc=2.2*10**3 #resistance in ohm\n",
"\n",
"#Calculation\n",
"vb=vcc*(r2*(r1+r2)**-1) # base voltage\n",
"ve=vb-vbe #emitter voltage\n",
"\n",
"\n",
"#Result\n",
"print'Quiescent Output Voltage, V = %.1f V'%ve\n"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": []
}
],
"metadata": {
"anaconda-cloud": {},
"kernelspec": {
"display_name": "Python [Root]",
"language": "python",
"name": "Python [Root]"
},
"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",
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"nbformat": 4,
"nbformat_minor": 0
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|
