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+{
+"cells": [
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "# Chapter 6: Common Emitter Approximations"
+ ]
+ },
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 6.10: Ac_output_voltage_across_the_final_load_resistor.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"// Example 6.10\n",
+"format('v',5)\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"// given data\n",
+"bita= 150;\n",
+"R1= 10*10^3;// in Ω\n",
+"R2= 2.2*10^3;// in Ω\n",
+"R_E= 1*10^3;// in Ω\n",
+"Rs= 1*10^3;// in Ω\n",
+"R_C= 3.6*10^3;// in Ω\n",
+"R_L= 1.5*10^3;// in Ω\n",
+"V_CC= 10;// in V\n",
+"V_BE= 0.7;// in V\n",
+"Vt= 25*10^-3;// in V\n",
+"Vin= 1*10^-3;// in V\n",
+"V_B= R2*V_CC/(R1+R2);// in V\n",
+"V_E= V_B-V_BE;// in V\n",
+"I_E= V_E/R_E;// in A\n",
+"r_desh_e= Vt/I_E;// in Ω\n",
+"Zin_base= bita*r_desh_e;// in Ω\n",
+"Zin= R1*R2*Zin_base/(R1*R2+R1*Zin_base+R2*Zin_base);// in Ω\n",
+"Vb1= Zin*Vin/(Rs+Zin);// in V\n",
+"r_L= R_C*Zin/(R_C+Zin);// in Ω\n",
+"V_B= R2*V_CC/(R1+R2);// in V\n",
+"V_E= V_B-V_BE;// in V\n",
+"I_E= V_E/R_E;// in A\n",
+"r_desh_e= Vt/I_E;// in Ω\n",
+"A1= r_L/r_desh_e;\n",
+"Vb2= A1*Vb1;// in V\n",
+"r_L= R_C*R_L/(R_C+R_L);// in Ω\n",
+"A2= r_L/r_desh_e;\n",
+"// The ac output voltage across the final load resistor \n",
+"Vout= A2*Vb2;// in V\n",
+"A= A1*A2;\n",
+"Vout= A*Vb1;// in V\n",
+"disp(Vout,'The ac output voltage across the final load resistor in volts is : ')\n",
+"\n",
+"\n",
+"\n",
+""
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 6.11: Ac_voltage_at_the_final_output.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"// Example 6.11\n",
+"format('v',6)\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"// given data\n",
+"bita= 150;\n",
+"R1= 10*10^3;// in Ω\n",
+"R2= 2.2*10^3;// in Ω\n",
+"R_C= 3.6*10^3;// in Ω\n",
+"Rs= 1*10^3;// in Ω\n",
+"R_L= 1.5*10^3;// in Ω\n",
+"r_E= 180;// in Ω\n",
+"R_E= 1*10^3;// in Ω\n",
+"V_CC= 10;// in V\n",
+"V_BE= 0.7;// in V\n",
+"Vt= 25*10^-3;// in V\n",
+"Vin= 1*10^-3;// in V\n",
+"V_B= R2*V_CC/(R1+R2);// in V\n",
+"V_E= V_B-V_BE;// in V\n",
+"I_E= V_E/R_E;// in A\n",
+"r_desh_e= Vt/I_E;// in Ω\n",
+"Zin_base= bita*(r_desh_e+r_E);// in Ω\n",
+"Zin= R1*R2*Zin_base/(R1*R2+R1*Zin_base+R2*Zin_base);// in Ω\n",
+"r_L= R_C*Zin/(R_C+Zin);// in Ω\n",
+"A1= r_L/(r_E+r_desh_e);\n",
+"r_L= R_C*R_L/(R_C+R_L);// in Ω\n",
+"A2= r_L/(r_desh_e+r_E);\n",
+"A= A1*A2;\n",
+"Vb1= Zin*Vin/(Rs+Zin);// in V\n",
+"// The ac voltage at the final output \n",
+"Vout= A*Vb1;// in V\n",
+"Vout= Vout*10^3;// in mV\n",
+"disp(Vout,'The ac voltage at the final output in mV is : ')\n",
+""
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 6.2: Total_voltage.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"// Example 6.2\n",
+"format('v',4)\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"// given data\n",
+"R1= 10;// in Ω\n",
+"R2= 10010;// in Ω\n",
+"V1= 10;// in V\n",
+"// The total voltage across the 10 Ω resistance \n",
+"V= R1/R2*V1;// in V\n",
+"V= V*10^3;// in mV\n",
+"disp(V,'The total voltage across the 10 Ω resistance in mV is :');\n",
+""
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 6.3: Total_current.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"// Example 6.3\n",
+"format('v',6)\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"// given data\n",
+"R= 10*10^3;// in Ω\n",
+"V_CC= 15;// in V\n",
+"V_BE= 0.7;// in V\n",
+"Vt= 25*10^-3;// in V\n",
+"Vp= 1*10^-3;// in V\n",
+"I= (V_CC-V_BE)/R;// in A\n",
+"r_ac= Vt/I;// in Ω\n",
+"// The total current through diode \n",
+"Ip= Vp/r_ac;// in A\n",
+"Ip= Ip*10^6;// in µA\n",
+"disp(Ip,'The total current through diode in µA is : ')\n",
+"\n",
+""
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 6.4: Input_impedence.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"// Example 6.4\n",
+"format('v',5)\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"// given data\n",
+"R1= 47*10^3;// in Ω\n",
+"R2= 15*10^3;// in Ω\n",
+"R_E= 8.2*10^3;// in Ω\n",
+"R_C= 10*10^3;// in Ω\n",
+"R3= 3.3*10^3;// in Ω\n",
+"bita= 200;\n",
+"V_CC= 30;// in V\n",
+"V_BE= 0.7;// in V\n",
+"Vin= 5*10^-3;//in V\n",
+"Vt= 25*10^-3;// in V\n",
+"V2= R2*V_CC/(R1+R2);// in V\n",
+"// DC voltage across emitter\n",
+"V_E= V2-V_BE;// in V\n",
+"// Emitter current\n",
+"I_E= V_E/R_E;// in A\n",
+"r_desh_e= Vt/I_E;// in Ω\n",
+"r_L= R_C*R3/(R_C+R3);//in Ω\n",
+"A= r_L/r_desh_e;\n",
+"// The output voltage \n",
+"Vout= A*Vin;// in V\n",
+"Zin_base= bita*r_desh_e;// in Ω\n",
+"// The input impedance of amplifier \n",
+"Zin= R1*R2*Zin_base/(R2*Zin_base+R1*Zin_base+R1*R2);// in Ω\n",
+"Vout= Vout*10^3;// in mV\n",
+"Zin= Zin*10^-3;// in k ohm\n",
+"disp(Vout,'The output voltage in mV is : ')\n",
+"disp(Zin,'The input impedance of amplifier in kΩ is : ')\n",
+"\n",
+""
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 6.5: Value_of_VB.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"// Example 6.5\n",
+"format('v',5)\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"// given data\n",
+"R1= 10*10^3;// in Ω\n",
+"R2= 2.2*10^3;// in Ω\n",
+"R_C= 3.6*10^3;// in Ω\n",
+"V_CC= 10;// in V\n",
+"I_C= 1.1*10^-3;// in A\n",
+"// The base voltage \n",
+"V_B= R2*V_CC/(R1+R2);// in V\n",
+"// The collector voltage \n",
+"V_C= V_CC-I_C*R_C;// in V\n",
+"disp(V_B,'The base voltage in V is : ')\n",
+"disp(V_C,'The collector voltage in V is : ')"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 6.6: Ac_output_voltage.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"// Example 6.6\n",
+"format('v',6)\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"// given data\n",
+"V2= 1.1;// in V\n",
+"Vin= 1*10^-3;// in V\n",
+"Vt= 25*10^-3;// in V\n",
+"R2= 1*10^3;// in Ω\n",
+"R_C= 3.6*10^3;// in Ω\n",
+"I_E= V2/R2;// in A\n",
+"// Emitter diode ac resistance\n",
+"r_desh_e= Vt/I_E;// in Ω\n",
+"A= R_C/r_desh_e;\n",
+"// The output voltage \n",
+"Vout= A*Vin;// in V\n",
+"Vout= Vout*10^3;// in mV\n",
+"disp(Vout,'The output voltage in mV is : ')"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 6.7: Minimum_and_maximum_voltage_gain.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"// Example 6.7\n",
+"format('v',5)\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"// given data\n",
+"R_C= 10*10^3;// in Ω\n",
+"R_L= 82*10^3;// in Ω\n",
+"r_E= 1*10^3;// in Ω\n",
+"r_desh_e_min= 50;// in Ω\n",
+"r_desh_e_max= 100;// in Ω\n",
+"r_L= R_C*R_L/(R_C+R_L);// in Ω\n",
+"// The minimum voltage gain \n",
+"A_min= r_L/r_desh_e_max;\n",
+"// The maximum voltage gain \n",
+"A_max= r_L/r_desh_e_min;\n",
+"disp(A_min,'The minimum voltage gain is : ')\n",
+"disp(A_max,'The maximum voltage gain is : ')"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 6.8: Input_impedance_of_the_amplifier.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"// Example 6.8\n",
+"format('v',5)\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"// given data\n",
+"bita= 200;\n",
+"R1= 47*10^3;// in Ω\n",
+"R2= 15*10^3;// in Ω\n",
+"r_E= 1*10^3;// in Ω\n",
+"r_desh_e= 50;// in Ω\n",
+"Zin_base= bita*(r_E+r_desh_e);// in Ω\n",
+"// The input impedance of the amplifier \n",
+"Zin= R1*R2*Zin_base/(R1*R2+R1*Zin_base+R2*Zin_base);// in Ω\n",
+"Zin= Zin*10^-3;// in k ohm\n",
+"disp(Zin,'The input impedance of the amplifier in kΩ is : ')\n",
+""
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 6.9: Input_impedance_of_each_stage.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"// Example 6.9\n",
+"format('v',5)\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"// given data\n",
+"bita= 150;\n",
+"R1= 10*10^3;// in Ω\n",
+"R2= 2.2*10^3;// in Ω\n",
+"R_E= 1*10^3;// in Ω\n",
+"V_CC= 10;// in V\n",
+"V_BE= 0.7;// in V\n",
+"Vt= 25*10^-3;// in V\n",
+"V_B= R2*V_CC/(R1+R2);// in V\n",
+"V_E= V_B-V_BE;// in V\n",
+"// The emitter current,\n",
+"I_E= V_E/R_E;// in A\n",
+"r_desh_e= Vt/I_E;// in Ω\n",
+"Zin_base= bita*r_desh_e;// in Ω\n",
+"// The input impedance of each stage \n",
+"Zin= R1*R2*Zin_base/(R1*R2+R1*Zin_base+R2*Zin_base);// in Ω\n",
+"Zin= Zin*10^-3;// in k ohm\n",
+"disp(Zin,'The input impedance of each stage in kΩ is : ')\n",
+""
+ ]
+ }
+],
+"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
+}
generated by cgit (git 2.34.1) at 2024-12-23 02:46:41 +0000