removing problem statements

1 files changed, 0 insertions, 32 deletions

diff --git a/Electronic_Principles_/Chapter_9_New.ipynb b/Electronic_Principles_/Chapter_9_New.ipynb
index f0e0aec7..3fb67bca 100644
--- a/Electronic_Principles_/Chapter_9_New.ipynb
+++ b/Electronic_Principles_/Chapter_9_New.ipynb
@@ -27,21 +27,15 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 9.1.py\n",

-      "#Using figure 9-1a, if R=2KOhm & the frequency range is from 20Hz to 20 KHz, \n",

-      "#find C nedded to act as a good coupling capacitor.\n",

       "\n",

       "import math\n",

       "\n",

-      "#Variable declaration\n",

       "f=20                  #frequency(Hz)\n",

       "R=2                   #Resistance(KOhm)\n",

       "\n",

-      "#Calculation\n",

       "XC=0.1*R                     #Capacitive reactance(Ohm)\n",

       "C=(1/(2*math.pi*f*XC))*1000     #Capacitance(uF)\n",

       "\n",

-      "#Result\n",

       "print 'Capacitance C = ',round(C,2),'uF'"

      ],

      "language": "python",

@@ -69,23 +63,17 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 9.2.py\n",

-      "#In figure 9-7, the input frequency of V is 1KHz. \n",

-      "#What value of C nedded to effectively short point E to ground?\n",

       "import math\n",

       "\n",

-      "#Variable declaration\n",

       "f=1                      #frequency(KHz)\n",

       "R1=600                   #Resistance1(Ohm)\n",

       "R2=1000                  #Resistance2(Ohm)\n",

       "\n",

-      "#Calculation\n",

       "\n",

       "RTH=R1*R2/(R1+R2)            #Thevenin resistance(Ohm)\n",

       "XC=0.1*RTH                   #Capacitive reactance(Ohm)\n",

       "C=(1/(2*math.pi*f*XC))*1000     #Capacitance(uF)\n",

       "\n",

-      "#Result\n",

       "print 'Capacitance C = ',round(C,2),'uF'"

      ],

      "language": "python",

@@ -113,20 +101,15 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 9.3.py\n",

-      "#Using figure 9-9, find the maximum small signal emitter current.\n",

       "\n",

-      "#Variable declaration\n",

       "VCC=10                  #collector voltage(V)\n",

       "RE=1                    #Emitter resistance(KOhm)\n",

       "VBE=0.7                 #Base-emitter voltage drop(V)\n",

       "VEE=2                   #Emitter supply voltage(V)\n",

       "\n",

-      "#Calculation\n",

       "IEQ=(VEE-VBE)/RE        #Q point emitter current(mA)\n",

       "iepp=0.1*IEQ*1000       #small signal emitter current(uA) \n",

       "\n",

-      "#Result\n",

       "print 'Q point emitter current IEQ = ',IEQ,'mA'\n",

       "print 'Small signal emitter current iepp = ',iepp,'uApp'"

      ],

@@ -156,10 +139,7 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 9.4.py\n",

-      "#What does re' equal in the base-biased amplifier of figure 9-15a? \n",

       "\n",

-      "#Variable declaration\n",

       "VCC=30                  #Supply voltage(V)\n",

       "RC=5                    #Collector resistance (KOhm)\n",

       "RL=100                  #Emitter resistance (KOhm)\n",

@@ -167,12 +147,10 @@
       "VBE=0.7                 #Base-emitter voltage drop(V)\n",

       "Bdc=100                 #current gain\n",

       "\n",

-      "#Calculation\n",

       "IB=(VCC-VBE)/RB         #Base current(mA)\n",

       "IE=Bdc*IB/1000          #Emitter current(mA)\n",

       "re=25/IE                #AC resistance(Ohm)\n",

       "\n",

-      "#Result\n",

       "print 'Emitter current IE = ',IE,'mA'\n",

       "print 'AC resistance re\\' = ',round(re,2),'Ohm'"

      ],

@@ -202,10 +180,7 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 9.5.py\n",

-      "#What does re' equal in figure 9-15b? \n",

       "\n",

-      "#Variable declaration\n",

       "VCC=10                  #collector voltage(V)\n",

       "RC=3.6                  #Collector resistance (KOhm)\n",

       "RE=1                    #Emitter resistance (KOhm)\n",

@@ -213,13 +188,11 @@
       "R2=2.2                  #Base resistance2 (KOhm)\n",

       "VBE=0.7                 #Base-emitter voltage drop(V)\n",

       "\n",

-      "#Calculation\n",

       "VBB=(R2/(R1+R2))*VCC    #Base voltage(V)\n",

       "VE=VBB-VBE              #Emitter voltage(V)\n",

       "IE=VE/RE                #Emitter current(mA)\n",

       "re=25/IE                #AC resistance(Ohm)\n",

       "\n",

-      "#Result\n",

       "print 'Emitter current IE = ',round(IE,2),'mA'\n",

       "print 'AC resistance re\\' = ',round(re,2),'Ohm'"

      ],

@@ -249,10 +222,7 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 9.6.py\n",

-      "#What is the ac resistance of emitter diode for the TSEB amplifier of figure 9-15c? \n",

       "\n",

-      "#Variable declaration\n",

       "VCC=10                  #collector voltage(V)\n",

       "RC=3.6                  #Collector resistance (KOhm)\n",

       "RE=1                    #Emitter resistance (KOhm)\n",

@@ -260,12 +230,10 @@
       "VBE=0.7                 #Base-emitter voltage drop(V)\n",

       "VEE=2                   #emitter voltage(V)\n",

       "\n",

-      "#Calculation\n",

       "VE=VEE-VBE              #Emitter to ground voltage(V)\n",

       "IE=VE/RE                #Emitter current(mA)\n",

       "re=25/IE                #AC resistance(Ohm)\n",

       "\n",

-      "#Result\n",

       "print 'Emitter current IE = ',IE,'mA'\n",

       "print 'AC resistance re\\' = ',round(re,2),'Ohm'"

      ],