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{
"metadata": {
"name": "",
"signature": "sha256:f64bf7a670dc36e359e5aa56e0bfa29f09c70f7a0babc95be4c64434f164d9d6"
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"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter10 - Comparators"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex 10.1 - page : 334"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from __future__ import division\n",
"from math import pi, sin\n",
"t=range(0,5) #sec(Assumed)\n",
"Vin=5*sin(2*pi*t[0]) #V\n",
"VCC=15 #V\n",
"R2=1 #kohm\n",
"R1=6.8 #kohm\n",
"VEE=-15 #V\n",
"Vsat=13 #V\n",
"Vref=R2*VCC/(R1+R2) #V\n",
"print \"Reference Voltage = %0.2f V \" %Vref\n",
"print \"If Vin>Vref , Vout = %0.2f V \" %Vsat \n",
"print \"If Vin<Vref , Vout = %0.2f V \" %-Vsat"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Reference Voltage = 1.92 V \n",
"If Vin>Vref , Vout = 13.00 V \n",
"If Vin<Vref , Vout = -13.00 V \n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex 10.2 - page 340"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from __future__ import division\n",
"Vsat=7 #V\n",
"R1=68 #kohm\n",
"R2=82 #kohm\n",
"VUTP=R2*Vsat/(R1+R2) #V\n",
"VLTP=R2*-Vsat/(R1+R2) #V\n",
"print \"Upper trip point = %0.2f V \" %VUTP \n",
"print \"Lower trip point = %0.2f V \" %VLTP"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Upper trip point = 3.83 V \n",
"Lower trip point = -3.83 V \n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex 10.3 - page : 340"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from __future__ import division\n",
"from numpy import arcsin, pi\n",
"#Vin=5*sin(omega*t)\n",
"Vm=5 #V\n",
"Vsat=7 #V\n",
"R1=68 #kohm\n",
"R2=82 #kohm\n",
"VUTP=R2*Vsat/(R1+R2) #V\n",
"fi=arcsin(VUTP/Vm)*180/pi #degree\n",
"print \"Phase shift = %0.2f degree \" %fi \n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Phase shift = 49.94 degree \n"
]
}
],
"prompt_number": 14
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex 10.4 - page : 344"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from __future__ import division\n",
"VZ1=4.7 #V\n",
"VZ2=4.7 #V\n",
"R1=68 #kohm\n",
"R2=15 #kohm\n",
"Vout=VZ1+0.7 #V(As one zener diode is always forward biased)\n",
"VR1=Vout #V\n",
"IR1=VR1/R1*1000 #micro A\n",
"IR2=IR1 #micro A\n",
"VR2=IR2*10**-3*R2 #V\n",
"Vout=VR1+VR2 #V\n",
"VUTP=(R2/(R1+R2))*Vout #V\n",
"VLTP=(R2/(R1+R2))*(-Vout) #V\n",
"print \"VUTP = %0.2f V \" %VUTP \n",
"print \"VLTP = %0.2f V \" %VLTP"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"VUTP = 1.19 V \n",
"VLTP = -1.19 V \n"
]
}
],
"prompt_number": 15
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex 10.5 - page : 346"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from __future__ import division\n",
"Vsat=12.5 #V\n",
"Vref=-12.5 #V\n",
"R1=80 #kohm\n",
"R2=20 #kohm\n",
"Beta=R2/(R1+R2) #unitless\n",
"UTP=Beta*Vsat+(1-Beta)*Vref #V\n",
"LTP=-Beta*Vsat+(1-Beta)*Vref #V\n",
"VH=UTP-LTP #V\n",
"R3=R1*R2/(R1+R2) #kohm\n",
"print \"UTP = %0.2f V \" %UTP \n",
"print \"LTP = %0.2f V \" %LTP \n",
"print \"Hysteresis Voltage, VH = %0.2f V \" %VH \n",
"print \"Use R3 = %0.2f kohm \" %R3 "
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"UTP = -7.50 V \n",
"LTP = -12.50 V \n",
"Hysteresis Voltage, VH = 5.00 V \n",
"Use R3 = 16.00 kohm \n"
]
}
],
"prompt_number": 16
}
],
"metadata": {}
}
]
}
|
