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{
"metadata": {
"name": "",
"signature": "sha256:2ade870854ad423c23bc0e9789e058b8c394048ea8748effcf2be142f7bdd1db"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"CHAPTER09 : SEMICONDUCTOR ELECTRONIC DEVICES"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E02 : Pg 404"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Quiescent point\n",
"Idq = 0.0034; # drain current\n",
"Vdq = 15.; # drain voltage\n",
"Vgq = 1.; # gate voltage\n",
"\n",
"Vdd = 24.; # drain supply voltage \n",
"\n",
"Rs = Vgq/Idq;\n",
"print '%s %.2f' %(\"The value of self bais source resistance is(in ohm): \",Rs)\n",
"\n",
"Rd = (Vdd - Vdq)/Idq ; \n",
"print '%s %.2f' %(\"The value of drain load resistance is(in ohm): \",Rd)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The value of self bais source resistance is(in ohm): 294.12\n",
"The value of drain load resistance is(in ohm): 2647.06\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E03 : Pg 426"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# a\n",
"# transistor parameters \n",
"import math \n",
"R2 = 0.625;\n",
"hie = 1.67;\n",
"Rb = 4.16;\n",
"Rl = 2.4;\n",
"Roe = 150.;\n",
" \n",
"Cc = 25. * 10.**-6.;\n",
"rBB = 0.29;\n",
"rBE = 1.375;\n",
"Cd = 6900. * 10.**-12.;\n",
"Ct = 40. * 10.**-12.;\n",
"gm = 0.032;\n",
" \n",
"Req = (Rl*Roe)/(Rl + Roe);\n",
"hfe = 44.;\n",
"a = 1. + (R2/Req);\n",
"b = 1. + (hie/Rb);\n",
"Aim = -hfe/(a*b); # mid band frequency gain \n",
"print '%s' %(\"a\")\n",
"print '%s %.2f' %(\"The mid band frequency gain of the first stage of the circuit is: \",Aim)\n",
" \n",
"# b\n",
"Tl = 2.*math.pi*(Req + R2)*Cc*(10.**3.);\n",
"Fl = 1./Tl; \n",
" \n",
"Rp = (Req*R2)/(Req + R2);\n",
"C = Cd + Ct*(1. + gm*Rp*10.**3.);\n",
"d = Rb + hie ;\n",
"e = rBE * (Rb + rBB)* 10.**3. * C ; \n",
"Fh = d/(2.*math.pi*e);\n",
" \n",
"BW = Fh - Fl;\n",
"print '%s' %(\"b\")\n",
"print '%s %.2f' %(\"The bandwidth of the first stage amplifier in Hz is :\",BW)\n",
" \n",
" "
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"a\n",
"The mid band frequency gain of the first stage of the circuit is: -24.83\n",
"b\n",
"The bandwidth of the first stage amplifier in Hz is : 20023.21\n"
]
}
],
"prompt_number": 2
}
],
"metadata": {}
}
]
}
|
