{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 12 : Display Record And Acquisition Of Data"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example12_1,pg 371"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# find excitation voltage and electrode areas\n",
"\n",
"import math\n",
"#Variable declaration\n",
"E=10**6 #electric field\n",
"l=10**-6 #thickness of LCD\n",
"V=E*l #excitation potential\n",
"I=0.1*10**-6 #current\n",
"rho=E/I #crystal resistivity\n",
"P=10*10**-6 #power consumption\n",
"A=(P/(V*I)) #area of electrodes\n",
"\n",
"\n",
"#Result\n",
"print(\"excitation potential:\")\n",
"print(\"V = %.f V\\n\"%V)\n",
"print(\"crystal resistivity:\")\n",
"print(\"rho = %.f * 10^-12 ohm-cm\\n\"%(rho*10**-12))\n",
"print(\"area of electrodes:\")\n",
"print(\"A = %.f cm^2\"%(A))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"excitation potential:\n",
"V = 1 V\n",
"\n",
"crystal resistivity:\n",
"rho = 10 * 10^-12 ohm-cm\n",
"\n",
"area of electrodes:\n",
"A = 100 cm^2\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example12_2,pg 383"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# find deviation factor\n",
"\n",
"import math\n",
"#Variable declaration\n",
"fc=10**6 #carrier frequency\n",
"m=0.4 #modulation index\n",
"fs=100.0 #signal frequency\n",
"V=2.0 #(+/-)2V range\n",
"\n",
"\n",
"#Calculations\n",
"delfc1=m*fc #frequency deviation for FS(full scale)\n",
"#(+/-) 2V corresponds to delfc Hz deviation assuming linear shift, for (+/-)1V\n",
"delfc2=delfc1/V #frequency deviation for (+/-)1V range\n",
"sig=(delfc1/fs) #deviation factor\n",
"\n",
"#Result\n",
"print(\"frequency deviation for FS:\")\n",
"print(\"delfc1 = %.f * 10^5 Hz\\n\"%(delfc1/10**5)) \n",
"print(\"frequency deviation for given range:\")\n",
"print(\"delfc2 = %.f * 10^5 Hz\\n\"%(delfc2/10**5)) \n",
"print(\"deviation factor:\")\n",
"print(\"sig = %.f * 10^3\"%(sig/10**3))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"frequency deviation for FS:\n",
"delfc1 = 4 * 10^5 Hz\n",
"\n",
"frequency deviation for given range:\n",
"delfc2 = 2 * 10^5 Hz\n",
"\n",
"deviation factor:\n",
"sig = 4 * 10^3\n"
]
}
],
"prompt_number": 9
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example12_3,pg 508"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# find wavelength of radiation\n",
"\n",
"import math\n",
"#Variable declaration\n",
"h=6.625*10**-34 #planck's const.\n",
"e=1.6*10**-19 #electron charge\n",
"c=2.998*10**8 #speed of light\n",
"E=2.02 #energy gap\n",
"\n",
"#Calculations\n",
"lam=((h*c)/E) #wavelength of radiation(m/eV)\n",
"#1eV=16.017*10^-20J\n",
"lam=(lam/(16.017*10**-20)) #conversion in meter\n",
"\n",
"#Result\n",
"print(\"wavelength of radiation:\")\n",
"print(\"lam = %.4f * 10^-6 m\"%(math.floor(lam*10**10)/10**4))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"wavelength of radiation:\n",
"lam = 0.6138 * 10^-6 m\n"
]
}
],
"prompt_number": 20
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example12_4,pg 508\n"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# thickness of LCD crystal\n",
"\n",
"import math\n",
"#Variable declaration\n",
"V=1.3 #excitation voltage\n",
"Vgrad=10.0**5 #potential gradient\n",
"\n",
"#Calculations\n",
"#10^5 V/mm*thickness in mm=excitation voltage\n",
"l=(V/Vgrad) #thickness of LCD\n",
"\n",
"#Result\n",
"print(\"thickness of LCD:\")\n",
"print(\"l = %.f micro-m\"%(l*10**6))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"thickness of LCD:\n",
"l = 13 micro-m\n"
]
}
],
"prompt_number": 22
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example12_5,pg 508"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# find current density\n",
"\n",
"import math\n",
"#Variable declaration\n",
"rho=4.0*10**12 #resistivity of LCD\n",
"Vgrad=10.0**6 #potential gradient\n",
"\n",
"#Calculations\n",
"j=(Vgrad/rho) #current density\n",
"\n",
"#Result\n",
"print(\"current per cm^2:\")\n",
"print(\"j = %.2f micro-A/cm^2\"%(j*10**6))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"current per cm^2:\n",
"j = 0.25 micro-A/cm^2\n"
]
}
],
"prompt_number": 24
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example12_6,pg 508"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# find magnetic flux in tape\n",
"\n",
"import math\n",
"#Variable declaration\n",
"f=2*10**3 #frequency of signal\n",
"v=1.0 #velocity of tape\n",
"w=0.05*10**-3 #gap width\n",
"N=22.0 #no.of turns on head\n",
"V=31*10**-3 #rms voltage o/p\n",
"\n",
"#Calculations\n",
"x=(math.pi*f*w)/v\n",
"x=x*(math.pi/180)\n",
"M=((V*w)/(2*v*N*math.sin(x)))\n",
"\n",
"#Result\n",
"print(\"magnetic flux in tape:\")\n",
"print(\"M = %.2f micro-Wb\"%(M*10**6))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"magnetic flux in tape:\n",
"M = 6.42 micro-Wb\n"
]
}
],
"prompt_number": 25
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example12_7,pg 509"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# channel accomodation\n",
"\n",
"import math\n",
"#variable declartion\n",
"Br=576.0*10**3 #bit rate conversion\n",
"n=8.0 #resolution requirement per channel\n",
"fs=1000.0 #sampling rate\n",
"\n",
"#Calculations\n",
"N=(Br/(fs*3*n)) #no. of channels\n",
"\n",
"#Result\n",
"print(\"no. of channels accomodated:\")\n",
"print(\"N = %.f \"%N)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"no. of channels accomodated:\n",
"N = 24 \n"
]
}
],
"prompt_number": 26
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example12_8,pg 509\n"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# sensor signal transmission\n",
"\n",
"import math\n",
"#Variable declaration\n",
"Rsmax=1.0*10**3 #sensor resistance max.\n",
"Rsmin=100.0 #sensor resistance min.\n",
"Vs=5.0 #sensor voltage\n",
"\n",
"#Calculations\n",
"Io=(Vs/Rsmax) #current source-> ohm's law\n",
"Vmin=Rsmin*Io #min. output voltage\n",
"\n",
"#Result\n",
"print(\"current source:\")\n",
"print(\"Io = %.f mA\\n\"%(Io*10**3))\n",
"print(\"min. output voltage:\")\n",
"print(\"Vmin = %.1f V\"%Vmin)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"current source:\n",
"Io = 5 mA\n",
"\n",
"min. output voltage:\n",
"Vmin = 0.5 V\n"
]
}
],
"prompt_number": 27
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example12_9,pg 509\n"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# ROM access time\n",
"\n",
"import math\n",
"#Variable declaration\n",
"#ROM 22*5*7\n",
"N=5.0 #no. of gates in bitand plane\n",
"n=22.0 #no.of inputs\n",
"f=913.0 #refresh rate\n",
"\n",
"#Calculations\n",
"#considering column display\n",
"ts=(1.0/(N*f*n)) #ROM access time\n",
"\n",
"#Result\n",
"print(\"ROM access time:\")\n",
"print(\"ts = %.6f ms\"%(ts*1000))\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"ROM access time:\n",
"ts = 0.009957 ms\n"
]
}
],
"prompt_number": 31
}
],
"metadata": {}
}
]
}