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{
"metadata": {
"name": "",
"signature": "sha256:42316ce336a06a4afe76966dd3df12fd0f55e47e7182329e33e900184918fde7"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 11: Tuned Voltage mplifiers"
]
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Example 11.1 Page No.374"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"C=300*10**(-12) #F, capacitance\n",
"L=220*10**(-6) #H, inductance\n",
"R=20.0 #Ohms, resistance\n",
"\n",
"#Calculation\n",
"import math\n",
"fr=1/(2*math.pi*math.sqrt(L*C)) #resonant frequency\n",
"#result\n",
"print \" The Resonant Frequency, fr = \",round(fr/10**3,0),\"khz\"\n",
"\n",
"#(b) find The Impedance at Resonance\n",
"#Calculation\n",
"Rr=R\n",
"#result\n",
"print \" The Impedance at Resonance, Rr = \",Rr,\"ohm\"\n",
"\n",
"#(c) find The Current at Resonance\n",
"V=10.0 #V, voltage\n",
"#Calculation\n",
"I=V/R\n",
"#result\n",
"print \" The Current at Resonance, I = \",I,\"A\"\n",
"\n",
"#(d)\n",
"#Calculation\n",
"fr=1/(2*math.pi*math.sqrt(L*C))\n",
"I=V/R\n",
"Xl=2*math.pi*fr*L #reactance of inductor\n",
"Vl=I*Xl # Voltage across the Inductance\n",
"Xc=1/(2*math.pi*fr*C) #reactance of capacitance\n",
"Vc=I*Xc # Voltage across the Capacitance,\n",
"Vr=I*R #Voltage across the Resistance\n",
"\n",
"#result\n",
"print \" Voltage across the Inductance, Vl = \",round(Vl,0),\"V\"\n",
"print \" Voltage across the Capacitance, Vc = \",round(Vc,0),\"V\"\n",
"print \" Voltage across the Resistance, Vr = \",round(Vr,0),\"V\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
" The Resonant Frequency, fr = 620.0 khz\n",
" The Impedance at Resonance, Rr = 20.0 ohm\n",
" The Current at Resonance, I = 0.5 A\n",
" Voltage across the Inductance, Vl = 428.0 V\n",
" Voltage across the Capacitance, Vc = 428.0 V\n",
" Voltage across the Resistance, Vr = 10.0 V\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Example 11.2 Page No.378"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"C=100*10**(-12) #F\n",
"L=100*10**(-6) #H\n",
"R=10 #Ohms\n",
"V=100 #V\n",
"\n",
"#Calculation\n",
"import math\n",
"fr=1/(2*math.pi*math.sqrt(L*C)) #Hz, resonant frequency\n",
"Xl=2*math.pi*fr*L #ohm, inductive reactance\n",
"Il=V/Xl #A, current in inductive branch\n",
"Xc=1/(2*math.pi*fr*C) #ohm, capacitance reactance\n",
"Ic=V/Xc #A, current in capacitive branch \n",
"Zp=L/(R*C) #ohm , series impedance\n",
"I=V/Zp #A, line current\n",
"\n",
"#Result\n",
"print \"fr= \",round(fr/10**3,0),\"khz\"\n",
"print \"Il= \",Il,\"A\"\n",
"print \"Ic= \",Ic,\"A\"\n",
"print \"Zp= \",Zp,\"ohm\"\n",
"print \"I= \",I/10**(-3),\"mA\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"fr= 1592.0 khz\n",
"Il= 0.1 A\n",
"Ic= 0.1 A\n",
"Zp= 100000.0 ohm\n",
"I= 1.0 mA\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Example 11.3 Page no. 379"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"import math\n",
"C=100*10**(-12) #F, capacitance\n",
"L=150*10**(-6) #H, inductance\n",
"R=15 #Ohms, resistance\n",
"\n",
"#Calculation\n",
"fr=1/(2*math.pi*math.sqrt(L*C))\n",
"Zp=L/(R*C)\n",
"Q=2*math.pi*fr*L/R\n",
"df=fr/Q #Bandwidth\n",
"\n",
"#The Result\n",
"print \" Impedance, Zp= \",Zp/10**3,\"kohm\"\n",
"print \" Quality Factor, Q= \",round(Q,1)\n",
"print \" Bandwidth, df= \",round(df/10**3,2),\"khz\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
" Impedance, Zp= 100.0 kohm\n",
" Quality Factor, Q= 81.6\n",
" Bandwidth, df= 15.92 khz\n"
]
}
],
"prompt_number": 5
}
],
"metadata": {}
}
]
}
|
