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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 7: Optical Receivers"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.1,Page number 203"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#given\n",
"\n",
"Trec=54; #in ns\n",
"Ttrans=40.0; #in ns\n",
"Pwd=(Trec-Ttrans)/Ttrans*100;\n",
"\n",
"print\"PWD=\",Pwd,\"percent\";\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"PWD= 35.0 percent\n"
]
}
],
"prompt_number": 20
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.2,Page number 214"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#given\n",
"\n",
"#Vc=Vdin-Vdinq\n",
"Vc=5; #in mV Vdin-Vdinq=Vc\n",
"Irset =1.8*10**-3*(Vc*10**-3); #in A\n",
"print\"Irset\",Irset*10**6,\"microA\";\n",
"Vs=1.5; #Voltage at signal level below Vcc in V\n",
"Radj=Vs/Irset; #in Ohm\n",
"print\"Radj\",round(Radj*10**-3,4),\"kohm\";"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Irset 9.0 microA\n",
"Radj 166.6667 kohm\n"
]
}
],
"prompt_number": 23
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.3,Page number 223"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#given\n",
"\n",
"Rl=50; #in Ohm\n",
"Ro=100; #in Ohm\n",
"Vos=450; #in mV\n",
"Vref=(Rl+Ro)/Rl*Vos/2;\n",
"\n",
"print\"Vref= \",Vref,\"mV\";\n",
"\n",
"Vee=3.3; #in V\n",
"R1=500; #in Ohm\n",
"R2=16000.0; #in Ohm\n",
"\n",
"#Rref=(Vee/Vref/10**3-1)*R1/(1-(R1/R2*(Vee/Vref/10**3-1)))\n",
"Rref=(((Vee/Vref)/(10**-3)-1)*R1)/((1-(R1/R2)*((Vee/Vref)/(10**-3)-1)));\n",
"print\"Rref= \",round(Rref,4),\"ohm\";\n",
"print\"Approx. Rref= \",round(Rref*10**-3,4),\"kohm\";\n",
"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Vref= 675 mV\n",
"Rref= 2213.4387 ohm\n",
"Approx. Rref= 2.2134 kohm\n"
]
}
],
"prompt_number": 24
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}
}
]
}
|
