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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 2024-12-20 19:41:58 +0000