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{
"metadata": {
"name": "",
"signature": "sha256:d7081c1de999174dc8f97847c2d374ebdce489247c4f5cd4f78037286264617c"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 5 - IC Operational Amplifiers in Switching Circuits"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E1 - Pg 152"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Caption:Design a non inverting amplifier by determining Required resistances and output voltage\n",
"Av=28.#Voltage gain\n",
"E=50.#Input voltage(in mV)\n",
"Ib=500.#Base current(in nA)\n",
"i=100.*Ib*0.001\n",
"R3=E/i\n",
"Vo=Av*E*0.001\n",
"r=Vo*1000./i\n",
"R2=r-R3\n",
"R1=(R2*R3)/(R2+R3)\n",
"print '%s %.1f %s %.f %s %.f %s %.f' %('Output voltage(in volts)=',Vo,'\\nRequired resistances\\nR3(in kilo ohm)=',R3,'\\nR2(in kilo ohm)=',R2,'\\nR1(in kilo ohm)=',R1)\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Output voltage(in volts)= 1.4 \n",
"Required resistances\n",
"R3(in kilo ohm)= 1 \n",
"R2(in kilo ohm)= 27 \n",
"R1(in kilo ohm)= 1\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E3 - Pg 158"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Caption:Design an inverter by determining input resistance,current and capacitance \n",
"Vo=11.#Output voltage(in volts)\n",
"Vcc=12.#Collector voltage(in volts)\n",
"Vi=6.#Input voltage(in volts)\n",
"f=1.#Frequency(in Khz)\n",
"Vb=0.5#Base voltage(in volts)\n",
"Vee=-12.#Emitter voltage(in volts)\n",
"Ib=500.#Max base current(in nA)\n",
"Vc=2.#Collector voltage(in volts)\n",
"Vr2=Vb-Vee\n",
"I2=100.*Ib*0.001\n",
"R2=Vr2/I2\n",
"i=Vr2/R2\n",
"R1=(Vcc-Vb)/i\n",
"Ri=99.\n",
"Ii=60.6\n",
"pw=1000./(2.*f)\n",
"C=(Ii*pw)*10.**(-6)/Vc\n",
"print '%s %.f %s %.1f %s %.3f' %('Input resistance(in kilo ohm)=',Ri,'\\nInput current(in micro ampere)=',Ii,'\\nCapacitance(in micro farad)=',C)\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Input resistance(in kilo ohm)= 99 \n",
"Input current(in micro ampere)= 60.6 \n",
"Capacitance(in micro farad)= 0.015\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E4 - Pg 163"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Caption:Design a differentiating circuit by determining required resistances and capacitance\n",
"Vo=5.#Output voltage(in volts)\n",
"Vi=1.#Change in input voltage(in volts)\n",
"t=100.#Time period(in micro sec)\n",
"I=1.#Circuit current(in mA)\n",
"R2=Vo/I\n",
"R1=235.\n",
"R3=R2\n",
"C=Vo*t/(R2*Vi*1000.)\n",
"print '%s %.1f %s %.f %s %.f %s %.f' %('Required components for circuit are \\nCapacitance(in micro farad)=',C,'\\nResistances R1(in ohm)=',R1,'\\nR2(in kilo ohm)=',R2,'\\nR3(in kilo ohm)=',R3)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Required components for circuit are \n",
"Capacitance(in micro farad)= 0.1 \n",
"Resistances R1(in ohm)= 235 \n",
"R2(in kilo ohm)= 5 \n",
"R3(in kilo ohm)= 5\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E5 - Pg 163"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Caption:Calculate lowest operating frequency for circuit\n",
"import math\n",
"V=4.#Peak to peak amplitude of output waveform(in volts)\n",
"Vi=10.#Input voltage(in volts)\n",
"Vs=15.#Supply voltage(in volts)\n",
"Ib=500.#Maximum Base current(in nA)\n",
"f=250.#Frequency of input waveform(in hz)\n",
"I=1.#Circuit current(in mA)\n",
"R1=Vi/I\n",
"R3=20.*R1\n",
"R2=(R3*R1)/(R1+R3)\n",
"t=1000./(2.*f)\n",
"C=(I*t)/V\n",
"F=22.*1000./(2.*math.pi*C*R3)\n",
"print '%s %.f' %('Required frequency(in hz)=',F)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Required frequency(in hz)= 35\n"
]
}
],
"prompt_number": 4
}
],
"metadata": {}
}
]
}
|
