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{
"metadata": {
"name": "",
"signature": "sha256:89c00d18387baa8ff8cb1569e29bf4fd2a1dcb717ea9b58f880f8e28f32b148c"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 12 - Integrated Circuit Logic Gates"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E1 - Pg 372"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Caption: Determine fan out for DTL NAND gate \n",
"hfe=19.1\n",
"Vbe=0.7#Base emitter voltage(in volts)\n",
"R3=6.#Resistance(in kilo ohm)\n",
"R2=5.#Resistance(in kilo ohm)\n",
"Vcc=5.#Supply voltage(in volts)\n",
"R1=2.#Resistance(in kilo ohm)\n",
"Vce=0.2#Collector emitter voltage(in volts)\n",
"Vf4=0.7#Diode forward voltage\n",
"Vf5=Vf4\n",
"Vf6=Vf4\n",
"I2=Vbe/R2\n",
"Va=Vf4+Vf5+Vbe\n",
"I1=(Vcc-Va)/R1\n",
"Ib=I1-I2\n",
"Ic1=hfe*Ib\n",
"I3=(Vcc-Vce)/R3\n",
"Iol=Ic1-I3\n",
"R4=R1\n",
"Iil=(Vcc-Vf6)/R4\n",
"fo=Iol/Iil\n",
"print '%s %.f' %('Fan out=',fo)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Fan out= 11\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E2 - Pg 381"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Caption:Determine Resistance to drive inputs of 5 TTL gates\n",
"Ii=1.6#Maximum input current(in mA)\n",
"Io=16.#Maximum output current(in mA)\n",
"Vcc=5.#Supply voltage(in volts)\n",
"Vo=0.4#Maximum output voltage(in volts)\n",
"Il=5.*Ii\n",
"Irc=Io-Il\n",
"Vrc=(Vcc-Vo)\n",
"Rc=Vrc*1000./Irc\n",
"print '%s %.f' %('Required resistance(in ohm)=',Rc)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Required resistance(in ohm)= 575\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E4 - Pg 403"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Caption:Design a interface circuit for CMOS\n",
"Vdd=15.#Drain voltage(in volts)\n",
"Rd=1.#Drain resistance(in kilo ohm)\n",
"Vcc=5.#Supply voltage(in volts)\n",
"Ih=40.#Current(in micro ampere)\n",
"hfe=20.\n",
"Vce=0.2#Saturated collector emitter voltage(in volts)\n",
"vih=2.#High input voltage(in volts)\n",
"il=1.6#Low input current\n",
"Vbe=0.7#Base emitter voltage(in volts)\n",
"Rc=(Vcc-vih)*1000./(2.*Ih)\n",
"Ic=((Vcc-Vce)/Rc)+(2.*il)\n",
"Ib=Ic/hfe\n",
"R=(Vdd-Vbe)/Ib\n",
"Rb=R-Rd\n",
"print '%s %.1f %s %.1f' %('Components required to design circuit are resistors \\nRb(in kilo ohm)=',Rb,'\\nRc(in kilo ohm)=',Rc)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Components required to design circuit are resistors \n",
"Rb(in kilo ohm)= 84.9 \n",
"Rc(in kilo ohm)= 37.5\n"
]
}
],
"prompt_number": 3
}
],
"metadata": {}
}
]
}
|
