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{
"metadata": {
"name": "",
"signature": "sha256:ba40baa44e757ea3e91ab8f89704f149291740011280e5a0d9caa508edb83db1"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter - 4 : Analog Electronic Meters"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.1 - Page No : 86\n",
" "
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given data\n",
"V_CC= 12 # in volt\n",
"V_BE=0.7 #in volt\n",
"Rsm=4.3 #value o Rs+Rm in kohm\n",
"I=1 #in mA\n",
"\n",
"# Part (i)\n",
"V= 5 #in volt\n",
"V_E= V-V_BE # in volt\n",
"Im= V_E/Rsm # in mA\n",
"I_E=Im # in mA\n",
"print \"Meter Current = %0.f mA\" %Im\n",
"\n",
"# Part(ii)\n",
"h_FE= 100 \n",
"Im=Im*10**-3 #in amp\n",
"I_B= Im/h_FE # in amp\n",
"Rin= V/I_B # in ohm\n",
"print \"Input resistance with transistor = %0.f kohm\" %(Rin*10**-3)\n",
"# without transistor\n",
"Rin= Rsm \n",
"print \"Input resistance without transistor = %0.1f kohm\" %Rin\n",
"\n",
"# Part(iii)\n",
"V=2.5 # in volt\n",
"V_E= V-V_BE # in volt\n",
"Im= V_E/Rsm # in mA\n",
"I_E=Im # in mA\n",
"print \"Meter current when the dc input voltage is 2.5 volt = %0.2f mA\" %Im"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Meter Current = 1 mA\n",
"Input resistance with transistor = 500 kohm\n",
"Input resistance without transistor = 4.3 kohm\n",
"Meter current when the dc input voltage is 2.5 volt = 0.42 mA\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.2 - Page No : 87"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" #Given data\n",
"V_CC= 12 # in volt\n",
"V_BE=0.7 #in volt\n",
"R_E1=3.3 # in kohm\n",
"V_EE= -12 # in volt\n",
"# Part (a) when V=0\n",
"V= 0 #in volt\n",
"V_E1= V-V_BE-V_EE # in volt\n",
"I_E1= V_E1/R_E1 # in mA\n",
"print \"Emitter current when input voltage is zero volt = %0.1f mA\" %I_E1\n",
"\n",
"# Part(b)\n",
"# Part (i) when V=2 volt\n",
"V= 2 #in volt\n",
"V_P=0 \n",
"V_E1= V-V_BE # in volt\n",
"V_E2= V_P-V_BE # in volt\n",
"Vm= V_E1-V_E2 # in volt\n",
"print \"Meter circuit voltage when input voltage is 2 volt = %0.f V\" %Vm\n",
"\n",
"# Part (ii) when V=1 volt\n",
"V= 1 #in volt\n",
"V_P=0 \n",
"V_E1= V-V_BE # in volt\n",
"V_E2= V_P-V_BE # in volt\n",
"Vm= V_E1-V_E2 # in volt\n",
"print \"Meter circuit voltage when input voltage is 1 volt = %0.f V\" %Vm"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Emitter current when input voltage is zero volt = 3.4 mA\n",
"Meter circuit voltage when input voltage is 2 volt = 2 V\n",
"Meter circuit voltage when input voltage is 1 volt = 1 V\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.4 - Page No : 92"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" #Given data\n",
"Im= 200 # in micro A\n",
"Im=Im*10**-6 # in amp\n",
"Rm= 5 # in kohm\n",
"Rm=Rm*10**3 # in ohm\n",
"I_B= 0.5 # in micro amp\n",
"I_B=I_B*10**-6 # in amp\n",
"V=25 # in mV\n",
"V=V*10**-3 # in volt\n",
"Vout= Im*Rm # in volt\n",
"I= 500*I_B # in amp\n",
"R1= V/I # in ohm\n",
"print \"The value of resistor = %0.f ohm\" %R1\n",
"Rf= (Vout-V)/I # in ohm\n",
"print \"Feedback resistor = %0.1f kohm\" %(Rf*10**-3)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The value of resistor = 100 ohm\n",
"Feedback resistor = 3.9 kohm\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.5 - Page No : 93"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" #Given data\n",
"Im= 1 # in mA\n",
"Im=Im*10**-3 # in amp\n",
"Rm= 100 # in ohm\n",
"V=1.2 # in volt\n",
"R1= V/Im # in ohm\n",
"print \"The value of resistance = %0.1f kohm\" %(R1*10**-3)\n",
"Vout= Im*(Rm+R1) # in volt\n",
"print \"Output voltage = %0.1f V\" %Vout"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The value of resistance = 1.2 kohm\n",
"Output voltage = 1.3 V\n"
]
}
],
"prompt_number": 6
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.6 - Page No : 100"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from math import sqrt \n",
"#Given data\n",
"Vrms=120 # in mV\n",
"Iav= 1.25 # in mA\n",
"I_max= 1/0.318*Iav # in mA\n",
"Vmax= sqrt(2)*Vrms # in mV\n",
"R2= Vmax/I_max # in ohm\n",
"print \"Value of R2 = %0.1f ohm\" %R2\n",
"# when input voltage is 60 volt\n",
"Vrms=60 # in mV\n",
"Vmax= sqrt(2)*Vrms # in mV\n",
"I_max= Vmax/R2 # in mA\n",
"Iav= I_max*0.318 # in mA\n",
"print \"Average value of meter current = %0.3f mA\" %Iav"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Value of R2 = 43.2 ohm\n",
"Average value of meter current = 0.625 mA\n"
]
}
],
"prompt_number": 8
}
],
"metadata": {}
}
]
}
|
