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-{
- "metadata": {
- "name": ""
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 1,
- "metadata": {},
- "source": [
- "Chapter - 5 : Transistor Circuits"
- ]
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 5.1\n",
- ": Page No 309 "
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "from __future__ import division\n",
- "from numpy import pi\n",
- "# Given data\n",
- "R1 = 600 # in ohm\n",
- "R2 = 1000 # in ohm\n",
- "R_TH = (R1*R2)/(R1+R2) # in ohm\n",
- "X_C = 37.5 # in ohm\n",
- "f = 1 # in kHz\n",
- "f= f*10**3 # in Hz\n",
- "C = 1/(2*pi * f*X_C) # in F\n",
- "print \"Value of C = %0.1f \u00b5F\" %(C*10**6)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Value of C = 4.2 \u00b5F\n"
- ]
- }
- ],
- "prompt_number": 3
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 5.2\n",
- ": Page No 323"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "# Given data\n",
- "R_C= 3.6*10**3 # in ohm\n",
- "R_L= 10*10**3 # in ohm\n",
- "r_c = (R_C*R_L)/(R_C+R_L) # in ohm\n",
- "V_CC = 10 # in V\n",
- "V_BE = 0.7 # in V\n",
- "R_E = 1 # in kohm\n",
- "R_E = R_E * 10**3 # in ohm\n",
- "R1 = 10 # in kohm\n",
- "R1= R1*10**3 # in ohm\n",
- "R2 = 2.2 # in kohm\n",
- "R2= R2*10**3 # in ohm\n",
- "V_B = (V_CC*R2)/(R1+R2) # in V\n",
- "I_E = (V_B-V_BE)/R_E # in A\n",
- "V = 25*10**-3 # in V # only value is given in the book \n",
- "r_e = V/I_E # in ohm\n",
- "A_V = round(r_c/r_e) \n",
- "print \"The voltage gain = %0.f\" %A_V\n",
- "V_in = 2 #in mV\n",
- "V_out = A_V*V_in # in mV\n",
- "print \"The output voltage = %0.f mV\" %V_out"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The voltage gain = 117\n",
- "The output voltage = 234 mV\n"
- ]
- }
- ],
- "prompt_number": 4
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 5.3\n",
- ": Page No 324"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "# Given data\n",
- "A_V = 117 \n",
- "r_e = 22.7 # in ohm\n",
- "bita = 300 \n",
- "Zin_base = bita*r_e # in ohm\n",
- "R1 = 2.2*10**3 # in ohm\n",
- "R2 = 10*10**3 # in ohm\n",
- "Zin_stage = (Zin_base*R1*R2)/(Zin_base*R1+R1*R2+R2*Zin_base) # in ohm \n",
- "R = 600 # in ohm\n",
- "V = 2 # in mV\n",
- "V_in = (Zin_stage/(R+Zin_stage))*V # in mV\n",
- "V_out = A_V * V_in # in mV\n",
- "print \"The output voltage = %0.f mV\" %round(V_out)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The output voltage = 165 mV\n"
- ]
- }
- ],
- "prompt_number": 5
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 5.4\n",
- ": Page No 328"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "# Given data\n",
- "R1 = 4.3 # in K ohm\n",
- "R1= R1*10**3 # in ohm\n",
- "R2 = 10 # in K ohm\n",
- "R2= R2*10**3 # in ohm\n",
- "r_e = (R1*R2)/(R1+R2) # in ohm\n",
- "bita = 200 \n",
- "V=25 # in mV\n",
- "I= 1 # in mA\n",
- "r_e_desh= V/I # in ohm\n",
- "Zin_base = bita*(r_e + r_e_desh) # in ohm\n",
- "print \"The input impedence of the base = %0.f k\u03a9\" %(Zin_base*10**-3)\n",
- "R3 = 10*10**3 # in ohm\n",
- "Zin_stage = (R2*R3*Zin_base)/(R2*Zin_base+R3*Zin_base+R2*R3) # in ohm\n",
- "print \"The input impedance of the stage = %0.2f k\u03a9\" %(Zin_stage*10**-3)\n",
- "print \"Because the input impedence of base is much larger than the input impedence of the stage,\"\n",
- "print \"usually approximate the input impedence of the stage as the parallel of the biasing resistor only %0.f k\u03a9\" %(Zin_stage*10**-3)\n",
- "Zin_stage= R2*R3/(R2+R3) # in ohm"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The input impedence of the base = 606 k\u03a9\n",
- "The input impedance of the stage = 4.96 k\u03a9\n",
- "Because the input impedence of base is much larger than the input impedence of the stage,\n",
- "usually approximate the input impedence of the stage as the parallel of the biasing resistor only 5 k\u03a9\n"
- ]
- }
- ],
- "prompt_number": 16
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 5.5\n",
- ": Page No 332"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "# Given data\n",
- "V_CE = 0.2 # in V\n",
- "V_BE= 0.7 # in V\n",
- "R = 1 # in kohm\n",
- "R = R * 10**3 # in ohm\n",
- "V = 10 # in V\n",
- "I_C = (V-V_CE)/R # in A\n",
- "beta_min = 50 \n",
- "I_B = I_C/beta_min # in A\n",
- "I_B1 = V*I_B # in A\n",
- "V1 = 5 # in V\n",
- "R_B = (V1-V_BE)/I_B1 # in ohm\n",
- "print \"The base resistance = %0.1f k\u03a9\" %(R_B*10**-3)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The base resistance = 2.2 k\u03a9\n"
- ]
- }
- ],
- "prompt_number": 17
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 5.6\n",
- ": Page No 333"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "# Given data\n",
- "R = 10 # in K ohm\n",
- "R = R * 10**3 # in ohm\n",
- "X_C = 0.1 * R \n",
- "C = 47 # in \u00b5F\n",
- "C = C * 10**-6 # in F\n",
- "f = 1/(2*pi * X_C *C) # in Hz\n",
- "print \"Lowest frequency = %0.2f Hz\" %f"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Lowest frequency = 3.39 Hz\n"
- ]
- }
- ],
- "prompt_number": 18
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 5.7\n",
- ": Page No 333"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "# Given data\n",
- "C = 220 # in \u00b5F\n",
- "C = C * 10**-6 # in F\n",
- "R1 = 10 # in kohm\n",
- "R1 = R1 * 10**3 # in ohm\n",
- "R2 = 2.2 # in kohm\n",
- "R2 = R2 * 10**3 # in ohm\n",
- "R_TH = (R1*R2)/(R1+R2) # in ohm\n",
- "X_C = 0.1*R_TH # in ohm\n",
- "f = 1/(2*pi*C*X_C) # in Hz\n",
- "print \"The lowest frequency = %0.2f Hz\" %f"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The lowest frequency = 4.01 Hz\n"
- ]
- }
- ],
- "prompt_number": 19
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 5.8\n",
- ": Page No 334"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "# Given data\n",
- "i_c = 15 # in mA\n",
- "i_c = i_c * 10**-3 # in A\n",
- "i_b = 100 # in \u00b5A\n",
- "i_b = i_b * 10**-6 # in A\n",
- "bita = i_c/i_b \n",
- "print \"The value of ac bita = %0.f\" %bita"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The value of ac bita = 150\n"
- ]
- }
- ],
- "prompt_number": 20
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 5.9\n",
- ": Page No 334"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "# Given data\n",
- "R_C = 3.6 # in kohm\n",
- "R_C= R_C*10**3 # in ohm\n",
- "R_L = 10 # in kohm\n",
- "R_L=R_L*10**3 # in ohm\n",
- "R_TH = (R_C*R_L)/(R_C+R_L) # in ohm\n",
- "V_CC = 10 # in V\n",
- "R2 = 2.2 # in kohm\n",
- "R2 = R2 * 10**3 # in ohm\n",
- "R1 = 10 # in kohm\n",
- "R1 = R1 * 10**3 # in ohm\n",
- "V_BE = 0.7 # in V\n",
- "V_B = (V_CC*R2)/(R1+R2) # in V\n",
- "R_E = 1 # in kohm \n",
- "R_E = R_E *10**3 # in ohm\n",
- "I_E = (V_B-V_BE)/R_E # in A\n",
- "V1 = 25 # in mV\n",
- "V1 = V1*10**-3 # in V\n",
- "r_e = V1/(I_E) # in ohm\n",
- "A_v = (R_TH)/r_e \n",
- "V_in = 2 # in mV\n",
- "V_in = V_in * 10**-3 # in V\n",
- "V_out = A_v*V_in # in V\n",
- "print \"The output voltage = %0.2f V\" %V_out"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The output voltage = 0.23 V\n"
- ]
- }
- ],
- "prompt_number": 21
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 5.10\n",
- ": Page No 336"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "# Given data\n",
- "R_L = 10 # in kohm\n",
- "R_L= R_L*10**3 # in ohm\n",
- "R_C = 3.6 # in kohm\n",
- "R_C= R_C*10**3 # in ohm\n",
- "r_e_desh = 22.73 # in ohm \n",
- "R_L_desh = R_L/2 # in ohm\n",
- "A_v = ( (R_C*R_L_desh)/(R_C+R_L_desh))/r_e_desh \n",
- "print \"The voltage gain = %0.2f\" %A_v"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The voltage gain = 92.08\n"
- ]
- }
- ],
- "prompt_number": 22
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 5.11\n",
- ": Page No 336"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "# Given data\n",
- "R_E = 1 # in kohm\n",
- "R_E = R_E * 10**3 # in ohm\n",
- "R_L = 3.3 # in kohm\n",
- "R_L = R_L * 10**3 # in ohm\n",
- "r_e = (R_E*R_L)/(R_E+R_L) # in ohm\n",
- "V_CC = 15 # in V\n",
- "R2 = 2.2 # in K ohm\n",
- "R2 = R2 * 10**3 # in ohm\n",
- "R1 = R2 # in ohm\n",
- "V_B = (V_CC*R2)/(R1+R2) # in V\n",
- "V_BE = 0.7 # in V\n",
- "R_E = 1 # in K ohm\n",
- "R_E = R_E * 10**3 # in ohm\n",
- "I_E = (V_B-V_BE)/R_E # in A\n",
- "V1 = 25*10**-3 # in V\n",
- "r_e1 = V1/I_E \n",
- "bita = 200 \n",
- "Zin_base = bita*(r_e+r_e1) # in ohm\n",
- "print \"The input impedence of the base = %0.2f k\u03a9\" %(Zin_base*10**-3)\n",
- "Zin_stage = (R1*R2*Zin_base)/(R1*R2+R2*Zin_base+R1*Zin_base) # in ohm\n",
- "print \"The input impedance of the stage = %0.2f k\u03a9\" %(Zin_stage*10**-3)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The input impedence of the base = 154.22 k\u03a9\n",
- "The input impedance of the stage = 1.09 k\u03a9\n"
- ]
- }
- ],
- "prompt_number": 23
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 5.12\n",
- ": Page No 337 "
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "# Given data\n",
- "r_e = 767.44 \n",
- "r_e1 = 3.68 \n",
- "V_in = 1 # in V\n",
- "A_v = round(r_e/(r_e+r_e1)) \n",
- "print \"The voltage gain = %0.f\" %A_v\n",
- "V_o = A_v*V_in # in V\n",
- "print \"The load voltage = %0.f V\" %V_o"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The voltage gain = 1\n",
- "The load voltage = 1 V\n"
- ]
- }
- ],
- "prompt_number": 24
- }
- ],
- "metadata": {}
- }
- ]
-} \ No newline at end of file
generated by cgit (git 2.34.1) at 2025-01-08 20:42:29 +0000