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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 11: Semiconductors"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 11.1: rms_current_and_peak_pd.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"clear\n",
+"//input\n",
+"vp=50//ac source supply\n",
+"r1=35\n",
+"r2=1450 //resistors\n",
+"//calculation\n",
+"vs=4*vp//transformer equation\n",
+"i=100/(r1+r2)//peak current\n",
+"irms=i/sqrt(2)//rms current\n",
+"v0=100*r1/(r1+r2)\n",
+"pp=100-v0//peak pd\n",
+"//output\n",
+"printf('the rms value of current is %3.3f A',irms)\n",
+"printf('\n the peak pd is %3.3f V',pp)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 11.2: common_emittor_transistor.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"clear\n",
+"//input\n",
+"vbe=1.2//pd across emitter\n",
+"ib=120*10^-6//base current\n",
+"v1=1.5//final voltafe\n",
+"i2=175*10^-6//increased current\n",
+"//calculation\n",
+"r=vbe/ib//static input resistence\n",
+"h=(v1-vbe)/(i2-ib)//input hybrid parameter\n",
+"//output\n",
+"printf('the static input resistence is %3.0e ohm',r)\n",
+"printf('\nthe input hybrid parameter is %3.3e ohm',h)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 11.3: common_base_transistor.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"clear\n",
+"//input\n",
+"v1=7.5//initial voltag\n",
+"v2=11.5//final voltage\n",
+"ic=18*10^-6//collector current\n",
+"//calculation\n",
+"r=(v2-v1)/ic//output resistance\n",
+"//output\n",
+"printf('the output resistance is %2.2e ohm ',r)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 11.4: common_emittor_amplifier.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"clear\n",
+"//input\n",
+"vbe=2.5//voltage across base-emitter\n",
+"hfe=75//current gain\n",
+"rb=75*10^3 //base current\n",
+"//calculation\n",
+"rc=5*rb/(vbe*hfe)//collector load resistance\n",
+"//output\n",
+"printf('the collector load resistance is %2.2e ohm',rc)"
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}