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{
"metadata": {
"name": "",
"signature": "sha256:13e4ad42742896befb0b329fd930804197555dd5705f1dd526b017e9117b7b00"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 7 Digital communication techniques"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.1 Page no 210"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"t = 71.4*10**-6\n",
"\n",
"#calculation\n",
"f = 1/t\n",
"fourth_harmonic = f*4\n",
"min_sampling = 2*fourth_harmonic\n",
"\n",
"#Result\n",
"print\"(a) The frequency of the signal is \",round(f/10**3,1),\"KHz\"\n",
"print\"(b) The fourth harmonic is \",round(fourth_harmonic/10**3,0),\"KHz\"\n",
"print\"(c) Minimum sampling rate is \",round(min_sampling/10**3,0),\"KHz\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"(a) The frequency of the signal is 14.0 KHz\n",
"(b) The fourth harmonic is 56.0 KHz\n",
"(c) Minimum sampling rate is 112.0 KHz\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.2 Page no 222"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"N = 14\n",
"discrete_levels = 2.0**N\n",
"\n",
"#Calculation\n",
"num_vltg_inc =2**N-1\n",
"resolution = 12/discrete_levels \n",
"\n",
"#Result\n",
"print\"(a) The numbedr of discrete levels that are represented using N number of bits are \",discrete_levels\n",
"print\"(b) the number odf voltage increments required to divide the voltage range are \",num_vltg_inc\n",
"print\"(c) Resolution of the digitization \",round(resolution*10**6,2),\"microvolt\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"(a) The numbedr of discrete levels that are represented using N number of bits are 16384.0\n",
"(b) the number odf voltage increments required to divide the voltage range are 16383\n",
"(c) Resolution of the digitization 732.42 microvolt\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.3 Page no 225"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"N =12\n",
"SINAD1=78\n",
"\n",
"#Calculation\n",
"SINAD2 = 6.02*N + 1.76\n",
"ENOB =(SINAD1 -1.76)/6.02\n",
"\n",
"#Result\n",
"print\"(a) The SINAD for 12 bit convertre is \",SINAD2,\"db\"\n",
"print\"(b) The ENOB for the converter with SINAD of 78 dB is \",round(ENOB,2),\"bits\" \n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"(a) The SINAD for 12 bit convertre is 74.0 db\n",
"(b) The ENOB for the converter with SINAD of 78 dB is 12.66 bits\n"
]
}
],
"prompt_number": 7
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.4 Page no 233"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Gievn\n",
"Vm = 1.0\n",
"Vin = 0.25\n",
"mu =255\n",
"\n",
"#Calculation\n",
"import math\n",
"Vout = (Vm*log(1+mu*(Vin/Vm)))/log(1+mu)\n",
"gain =Vout/Vin\n",
"\n",
"#Result\n",
"print\"The output voltage of the compander \",round(Vout,2),\"volt\"\n",
"print\"Gain of the compander is \",round(gain,0)\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The output voltage of the compander 0.75 volt\n",
"Gain of the compander is 3.0\n"
]
}
],
"prompt_number": 9
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.5 Page no 234"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"Vin = 0.8\n",
"Vm =1.0\n",
"mu =255\n",
"\n",
"#Calculation\n",
"import math\n",
"Vout = (Vm*math.log(1+mu*(Vin/Vm)))/math.log(1+mu)\n",
"gain =Vout/Vin\n",
"\n",
"#Result\n",
"print\"The output voltage of the compander \",round(Vout,1),\"volt\"\n",
"print\"Gain of the compander is \",round(gain,1)\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The output voltage of the compander 1.0 volt\n",
"Gain of the compander is 1.2\n"
]
}
],
"prompt_number": 14
}
],
"metadata": {}
}
]
}
|
