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{
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"name": "",
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"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"CHAPTER 3 - Semiconductor devices switching mode operation"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE 3.3 -PG NO.88"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#page no.88\n",
"#example 3.3#\n",
"#clears the screen#\n",
"#clears already existing varibales#\n",
"a=10.#\n",
"#input voltage (in volts)#\n",
"b=.7#\n",
"#transistor voltage(saturation voltage)#\n",
"c=5.#\n",
"#resistor b/w input voltage and the transistor#\n",
"d=10.#\n",
"#input voltage from collector side#\n",
"e=0.1#\n",
"#transistor voltage(saturation voltage from collector side)#\n",
"f=2.#\n",
"#resistor in kilo-ohm#\n",
"g=30.#\n",
"h=-10.#\n",
"#input voltage from emitter side#\n",
"I=(a-b)/c#\n",
"#base current of transistor from given figure#\n",
"print('the base current of given circuit is (in mA):')\n",
"print(I)\n",
"#base current is in mA#\n",
"K=(d-e)/f\n",
"#collector current of transistor from given figure#\n",
"print('the collector current of given circuit is (in mA):')\n",
"print(round(K))\n",
"#collector current in mA(saturation current)#\n",
"L=K/g\n",
"print('base current required for the transistor to be in saturation is (in mA):')\n",
"print(L)\n",
"#current in mA#\n",
"M=(h-b)/c\n",
"print('the base current is (in mA):')\n",
"print(M)\n",
"#base current in mA#"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"the base current of given circuit is (in mA):\n",
"1.86\n",
"the collector current of given circuit is (in mA):\n",
"5.0\n",
"base current required for the transistor to be in saturation is (in mA):\n",
"0.165\n",
"the base current is (in mA):\n",
"-2.14\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE 3.4.a- PG NO.95"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#page no. 95\n",
"#example 3.4(a)#\n",
"#clears the screen#\n",
"#clears already existing variables#\n",
"print('when the input voltage V(i)= -5V, the JFET is opening at point A, where I(D)=0 and V(0)=V(DD)=20V')\n",
"print('this corresponds to the switch in OFF state')"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"when the input voltage V(i)= -5V, the JFET is opening at point A, where I(D)=0 and V(0)=V(DD)=20V\n",
"this corresponds to the switch in OFF state\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE 3.4.b- PG NO. 95"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#page no. 95\n",
"#example 3.4(b)#\n",
"#clears the screen#\n",
"#clears the command window#\n",
"print('when V(i)=0V, the JFET is operating at point B, where I(D)=3.8mA and V(0)=1V')\n",
"print('this corresponds to the switch in ON state')\n",
"#the answers have been taken directly from the figure#"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"when V(i)=0V, the JFET is operating at point B, where I(D)=3.8mA and V(0)=1V\n",
"this corresponds to the switch in ON state\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE 3.5.a - PG NO.96"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#page no. 96\n",
"#example 3.5(a)#\n",
"#clears the window#\n",
"#clears already existing variables#\n",
"print('when V(i)=0, the transistor is cutoff because the voltage between the gate and the source is below the threshold voltage. Correspondingly the output voltage V(0)=5V(point (N) as in figure)')\n",
"#answer according to the cuts of load line#"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"when V(i)=0, the transistor is cutoff because the voltage between the gate and the source is below the threshold voltage. Correspondingly the output voltage V(0)=5V(point (N) as in figure)\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE 3.5.b -PG NO.96"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#page 96\n",
"#example 3.5(b)#\n",
"#clears the window#\n",
"#clears already existing variables#\n",
"print('when V(i)=5V, the transistor is operating at point M and V(0)=0')\n",
"print('this corresponds to ON state!')"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"when V(i)=5V, the transistor is operating at point M and V(0)=0\n",
"this corresponds to ON state!\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE 3.7.a - PG NO. 97"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#page no. 97\n",
"#example 3.7(a)#\n",
"#clears the screen#\n",
"#clears existing variables#\n",
"print('when V(i)=0, the transistor T(1) is operating at point B')\n",
"t=5.#\n",
"#input voltage as given in question#\n",
"x=0.#\n",
"V=t-x#\n",
"#output voltage in volts#\n",
"print('here V(0)(in volts)=')\n",
"print(V)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"when V(i)=0, the transistor T(1) is operating at point B\n",
"here V(0)(in volts)=\n",
"5.0\n"
]
}
],
"prompt_number": 6
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE 3.7.b - PG NO. 97"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#page no.97\n",
"#example 3.7(b)#\n",
"#clears the screen#\n",
"#clears already existing variables#\n",
"print('when V(i)=5V, the transistor T(1) is operating at point C')\n",
"V=0#\n",
"print('output voltage in volts=')\n",
"print(V)\n",
"#all the outcomes are as per the diagram#"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"when V(i)=5V, the transistor T(1) is operating at point C\n",
"output voltage in volts=\n",
"0\n"
]
}
],
"prompt_number": 8
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}
}
]
}
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