summaryrefslogtreecommitdiff
path: root/Electronic_Devices_by_T_L_Floyd/13-Basic_Opamp_Circuits.ipynb
diff options
context:
space:
mode:
Diffstat (limited to 'Electronic_Devices_by_T_L_Floyd/13-Basic_Opamp_Circuits.ipynb')
-rw-r--r--Electronic_Devices_by_T_L_Floyd/13-Basic_Opamp_Circuits.ipynb376
1 files changed, 376 insertions, 0 deletions
diff --git a/Electronic_Devices_by_T_L_Floyd/13-Basic_Opamp_Circuits.ipynb b/Electronic_Devices_by_T_L_Floyd/13-Basic_Opamp_Circuits.ipynb
new file mode 100644
index 0000000..9b762b7
--- /dev/null
+++ b/Electronic_Devices_by_T_L_Floyd/13-Basic_Opamp_Circuits.ipynb
@@ -0,0 +1,376 @@
+{
+"cells": [
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "# Chapter 13: Basic Opamp Circuits"
+ ]
+ },
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 13.1: Comparator.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//ex13.1\n",
+"R2=1*10^3;\n",
+"R1=8.2*10^3;\n",
+"V=15;\n",
+"V_REF=R2*V/(R1+R2);\n",
+"disp(V_REF,'V_REF in volts')\n",
+"V_max=12; //maximum output level of op-amp\n",
+"V_min=-12; //minimum output voltage of comparator\n",
+"f=1; //assume frequency of input wave to be 1 hertz\n",
+"t=0:0.001:3;\n",
+"V_in=5*sin(2*%pi*f.*t)\n",
+"clf();\n",
+"subplot(121)\n",
+"xtitle('Input to comparator-1')\n",
+"plot(t,V_in)\n",
+"subplot(122)\n",
+"xtitle('Output of Comparator-1')\n",
+"a=bool2s(V_in>=V_REF)\n",
+"b=~a;\n",
+"y=V_max*a+V_min*b;\n",
+"plot(t,y)\n",
+"disp(V_max,'max output voltage in volts')\n",
+"disp(V_min,'min output voltage in volts')"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 13.2: Trigger_points.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//ex13.2\n",
+"R1=100*10^3;\n",
+"R2=R1;\n",
+"V_out_max=5;\n",
+"V_UTP=R2*V_out_max/(R1+R2);\n",
+"V_LTP=-V_out_max*R2/(R1+R2);\n",
+"disp(V_UTP,'upper trigger point in volts')\n",
+"disp(V_LTP,'lower trigger point in volts')"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 13.3: Comparator_hysteris_Zener_bounding.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//ex13.3\n",
+"R1=100*10^3;\n",
+"R2=47*10^3;\n",
+"V_R1=4.7+0.7; //one zener is always forward biased with forward voltage 0.7V \n",
+"//V_R1 can be positive or negative\n",
+"I_R1=V_R1/R1; \n",
+"I_R2=I_R1;\n",
+"V_R2=R2*I_R2;\n",
+"V_out=V_R1+V_R2; //positive or negative\n",
+"V_UTP=R2*V_out/(R1+R2);\n",
+"V_LTP=-V_out*R2/(R1+R2);\n",
+"f=1; //assume frequency of input as 1 Hertz\n",
+"t=0:0.001:1;\n",
+"T=1/f;\n",
+"V_in=5*sin(2*%pi*f.*t)\n",
+"subplot(121)\n",
+"xtitle('Input to comparator-2')\n",
+"plot(t,V_in)\n",
+"subplot(122)\n",
+"xtitle('Output of Comparator-2')\n",
+"t1=(1/(2*%pi*f))*asin((V_UTP/5))\n",
+"a=bool2s(t<t1)\n",
+"b=bool2s(t>((T/2)+t1))\n",
+"a=bool2s(a|b)\n",
+"b=~a;\n",
+"y=V_out*a-V_out*b;\n",
+"plot(t,y)\n",
+"disp(V_out,'max output voltage in volts')\n",
+"disp(-V_out,'min output voltage in volts')"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 13.4: Summing_amplifier_unity_gain.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//ex13.4\n",
+"V_IN1=3;\n",
+"V_IN2=1;\n",
+"V_IN3=8;\n",
+"//all resistors are of equal value so weight of each input is 1\n",
+"V_OUT=-(V_IN1+V_IN2+V_IN3);\n",
+"disp(V_OUT,'output voltage in volts')"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 13.5: Summing_amplifier.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//ex13.5\n",
+"R_f=10*10^3;\n",
+"R1=1*10^3;\n",
+"R2=R1;\n",
+"R=R1;\n",
+"V_IN1=0.2;\n",
+"V_IN2=0.5;\n",
+"V_OUT=-(R_f/R)*(V_IN1+V_IN2);\n",
+"disp(V_OUT,'output voltage of the summing amplifier in volts')"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 13.6: Averaging_amplifier.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//ex13.6\n",
+"R_f=25*10^3;\n",
+"R1=100*10^3;\n",
+"R2=R1;\n",
+"R3=R1;\n",
+"R4=R1;\n",
+"R=R1;\n",
+"V_IN1=1;\n",
+"V_IN2=2;\n",
+"V_IN3=3;\n",
+"V_IN4=4;\n",
+"V_OUT=-(R_f/R)*(V_IN1+V_IN2+V_IN3+V_IN4);\n",
+"disp(V_OUT,'output voltage in volts')\n",
+"V_IN_avg=(V_IN1+V_IN2+V_IN3+V_IN4)/4;\n",
+"if abs(V_OUT)==V_IN_avg then\n",
+" disp('the amplifier produces an output whose magnitude is the mathematical average of the input voltages')\n",
+"end"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 13.7: Scaling_adder.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//ex13.4\n",
+"V_IN1=3;\n",
+"V_IN2=2;\n",
+"V_IN3=8;\n",
+"R_f=10*10^3;\n",
+"R1=47*10^3;\n",
+"R2=100*10^3;\n",
+"R3=10*10^3;\n",
+"weight_of_input1=R_f/R1;\n",
+"weight_of_input2=R_f/R2;\n",
+"weight_of_input3=R_f/R3;\n",
+"V_OUT=-(weight_of_input1*V_IN1+weight_of_input2*V_IN2+weight_of_input3*V_IN3);\n",
+"disp(weight_of_input1,'weight_of_input1')\n",
+"disp(weight_of_input2,'weight_of_input2')\n",
+"disp(weight_of_input3,'weight_of_input3')\n",
+"disp(V_OUT,'output voltage in volts')"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 13.8: Opamp_integrator.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//ex13.8\n",
+"R_i=10*10^3;\n",
+"C=0.01*10^-6;\n",
+"V_in=2.5-(-2.5);\n",
+"PW=100*10^-6; //pulse width\n",
+"T=2*PW;\n",
+"A=2.5;\n",
+"op_change_cap_charge=-V_in/(R_i*C);\n",
+"op_change_cap_discharge=V_in/(R_i*C);\n",
+"disp(op_change_cap_charge,'rate of change of output voltage with respect to time when capacitor is charging (in Volts per sec)')\n",
+"disp(op_change_cap_discharge,'rate of change of output voltage with respect to time when capacitor is discharging (in Volts per sec)')\n",
+"del_V_OUT=op_change_cap_discharge*PW;\n",
+"disp(-del_V_OUT,'when input is positive, the slope is negative, when input is negative , the slope is negative. So, the output is a triangular wave varying from zero to')\n",
+"subplot(121)\n",
+"xtitle('input voltage of op-amp differentiator')\n",
+"t=0:10^-7:2*T;\n",
+"a=bool2s(t>=T/2 & t<=T)\n",
+"b=bool2s(t>=1.5*T & t<=2*T)\n",
+"a=bool2s(a|b)\n",
+"b=~a;\n",
+"y=-A*b+A*a;\n",
+"plot(t,y)\n",
+"subplot(122)\n",
+"xtitle('output voltage of op-amp diferentiator')\n",
+"x=[];\n",
+"A=del_V_OUT;\n",
+"for t=0:10^-7:2*T \n",
+" tcor = t- floor(t/T)*T;\n",
+" if tcor >= 0 & tcor < (T/2) then\n",
+" x_temp = -A +(2*A/T)*tcor;\n",
+" end; \n",
+" if tcor >= (T/2) & tcor <T then\n",
+" x_temp = A - (2*A/T)*tcor;\n",
+" end\n",
+" x = [x, x_temp];\n",
+" end;\n",
+"t=0:10^-7:2*T;\n",
+"plot(t,x)"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 13.9: Opamp_differentiator.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//ex13.9\n",
+"R_f=2.2*10^3;\n",
+"C=0.001*10^-6;\n",
+"Vc=5-(-5);\n",
+"A=5;\n",
+"time_const=R_f*C;\n",
+"T=10*10^-6;\n",
+"t=T/2;\n",
+"slope=Vc/t;\n",
+"V_out=slope*time_const; //V_out is negative when input is positive and V_out is positive when input is negative\n",
+"disp(V_out,'output voltage in volts is a square wave with peak voltages positive and negative of')\n",
+"subplot(121)\n",
+"xtitle('input voltage for integrator op-amp')\n",
+"x=[];\n",
+"for t=0:10^-8:2*T\n",
+" tcor = t- floor(t/T)*T;\n",
+" if tcor >= 0 & tcor < (T/2) then\n",
+" x_temp = -A +(4*A/T)*tcor;\n",
+" end; \n",
+" if tcor >= (T/2) & tcor <T then\n",
+" x_temp = 3*A - (4*A/T)*tcor;\n",
+" end\n",
+" x = [x, x_temp];\n",
+" end;\n",
+" t=0:10^-8:2*T;\n",
+" plot(t,x)\n",
+"subplot(122)\n",
+"xtitle('output voltage of differentiator op-amp')\n",
+"a=bool2s(t>=T/2 & t<=T)\n",
+"b=bool2s(t>=1.5*T & t<=2*T)\n",
+"a=bool2s(a|b)\n",
+"b=~a;\n",
+"y=V_out*a-V_out*b;\n",
+"plot(t,y)\n",
+"disp(V_out,'max output voltage in volts')\n",
+"disp(-V_out,'min output voltage in volts')"
+ ]
+ }
+],
+"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 2025-07-14 21:44:22 +0000