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-{
- "cells": [
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "# Chapter 4 Operational Amplifier"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example 4.1 Pg 79"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 6,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " closed loop gain of an op-amp is = 35.00\n",
- " the input impedance Zin = 10.00 kohm \n",
- " the output impedance Z0 = 0.020 ohm \n"
- ]
- }
- ],
- "source": [
- "from __future__ import division\n",
- "# For an op-amp circuit find a) closed loop gain Acl b) input impedance Zin c) output impedance Zo\n",
- "ro = 85 # # ohm\n",
- "A = 150*10**3 # # ohm\n",
- "R2 = 350*10**3 # # ohm # Feedback resistance\n",
- "R1 = 10*10**3 # # ohm # Input resistance\n",
- "\n",
- "# a) closed loop gain\n",
- "# ACL = abs(Vo/Vin) = abs(R2/R1)\n",
- "ACL = abs(R2/R1) #\n",
- "print ' closed loop gain of an op-amp is = %0.2f'%ACL# # 1/beta = ACL\n",
- "beta = (1/ACL) #\n",
- "\n",
- "# b) the input impedance Zin\n",
- "Zin = R1 #\n",
- "print ' the input impedance Zin = %0.2f'%(Zin/1e3),'kohm '#\n",
- "\n",
- "# c0 the output impedance Z0\n",
- "Z0 = (ro)/(1+(beta*A))#\n",
- "print ' the output impedance Z0 = %0.3f'%Z0,' ohm '#"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example 4.2 Pg 80"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 5,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " The difference voltage is = 10.00 V \n",
- " The open loop gain is = 2.00 \n"
- ]
- }
- ],
- "source": [
- "# Determine the differece voltage and open loop gain of an op-amp\n",
- "V1 = -5 # # volt # input voltage\n",
- "V2 = 5 # # volt\n",
- "Vo = 20 # #volt # output voltage\n",
- "\n",
- "# the difference voltage is given by \n",
- "Vd = V2-V1 #\n",
- "print ' The difference voltage is = %0.2f'%Vd,' V '\n",
- "\n",
- "# open loop gain \n",
- "A = (Vo/Vd)#\n",
- "print ' The open loop gain is = %0.2f'%A,' '"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example 4.3 Pg 80"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 7,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " The difference voltage is = 5.00 V \n",
- " The open loop gain is = 4.00 \n"
- ]
- }
- ],
- "source": [
- "# Determine the differece voltage and open loop gain of an op-amp\n",
- "V1 = -5 # # volt # input voltage\n",
- "V2 = 0 # # volt # GND\n",
- "Vo = 20 # #volt # output voltage\n",
- "\n",
- "# the difference voltage is given by \n",
- "Vd = V2-V1 #\n",
- "print ' The difference voltage is = %0.2f'%Vd,' V '\n",
- "\n",
- "# open loop gain \n",
- "A = (Vo/Vd)#\n",
- "print ' The open loop gain is = %0.2f'%A,' '"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example 4.4 Pg 81"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 8,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " The difference voltage is = 5.00 V \n",
- " The open loop gain is = 4.00 \n"
- ]
- }
- ],
- "source": [
- "# Determine the differece voltage and open loop gain of an op-amp\n",
- "V1 = 0 # # volt # input voltage # GND\n",
- "V2 = 5 # # volt \n",
- "Vo = 20 # #volt # output voltage\n",
- "\n",
- "# the difference voltage is given by \n",
- "Vd = V2-V1 #\n",
- "print ' The difference voltage is = %0.2f'%Vd,' V '\n",
- "\n",
- "# open loop gain \n",
- "A = (Vo/Vd)#\n",
- "print ' The open loop gain is = %0.2f'%A,' '"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example 4.5 Pg 81"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 10,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " The difference voltage is = -10.00 V \n",
- " The open loop gain is = 2.00 \n"
- ]
- }
- ],
- "source": [
- "# Determine the differece voltage and open loop gain of an op-amp\n",
- "V1 = 5 # # volt # input voltage # GND\n",
- "V2 = -5 # # volt \n",
- "Vo = -20 # #volt # output voltage\n",
- "\n",
- "# the difference voltage is given by \n",
- "Vd = V2-V1 #\n",
- "print ' The difference voltage is = %0.2f'%Vd,' V '\n",
- "\n",
- "# open loop gain \n",
- "A = (Vo/Vd)#\n",
- "print ' The open loop gain is = %0.2f'%A,' '"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example 4.6 Pg 82"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 7,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "The Closed loop gain of an inverting op-amp is = -2.50 \n",
- "The |Ac| Closed loop gain of an inverting op-amp is = 2.50 \n",
- "The output voltage of an inverting op-amp is = -25.00 V \n"
- ]
- }
- ],
- "source": [
- "from __future__ import division\n",
- "# To find closed loop gain and output voltage Vo of an inverting op-amp\n",
- "R1 = 10 # #kilo ohm # input resistance\n",
- "R2 = 25 # # kilo ohm # feedback resistance\n",
- "Vin = 10 # #volt # input voltage\n",
- "\n",
- "# Closed loop gain of an inverting op-amp\n",
- "Ac = -(R2/R1) #\n",
- "print 'The Closed loop gain of an inverting op-amp is = %0.2f'%Ac,' '\n",
- "Ac = abs(Ac)#\n",
- "print 'The |Ac| Closed loop gain of an inverting op-amp is = %0.2f'%Ac,' '\n",
- "\n",
- "# the output voltage of an inverting op-amp\n",
- "Vo = -(R2/R1)*Vin #\n",
- "print 'The output voltage of an inverting op-amp is = %0.2f'%Vo,' V '"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example 4.7 Pg 82"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 8,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " The Closed loop gain of an non-inverting op-amp is = 3.50 \n",
- " The output voltage of an non-inverting op-amp is = 35.00 V \n"
- ]
- }
- ],
- "source": [
- "# To find closed loop gain and output voltage Vo of an non-inverting op-amp\n",
- "R1 = 10 # #kilo ohm # input resistance\n",
- "R2 = 25 # # kilo ohm # feedback resistance\n",
- "Vin = 10 # #volt # input voltage\n",
- "\n",
- "# Closed loop gain of an non-inverting op-amp\n",
- "Ac = 1+(R2/R1) #\n",
- "Ac = abs(Ac)#\n",
- "print ' The Closed loop gain of an non-inverting op-amp is = %0.2f'%Ac,' '\n",
- "\n",
- "# the output voltage of an inverting op-amp\n",
- "Vo = (1+R2/R1)*Vin #\n",
- "print ' The output voltage of an non-inverting op-amp is = %0.2f'%Vo,' V '"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example 4.8 Pg 83"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 9,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "The closed loop gain of differntial op-amp is = 2.50 \n",
- "The output voltage of an non-inverting op-amp is= 50.00 V \n"
- ]
- }
- ],
- "source": [
- "# to find out closed loop gain and output voltage Vo\n",
- "R1 = 10 # #kilo ohm # input resistance\n",
- "R3 = 10 # #kilo ohm # input resistance\n",
- "R2 = 25 # # kilo ohm # feedback resistance\n",
- "R4 = 25 # # kilo ohm # feedback resistance\n",
- "Vin2 = 10 # #volt # input voltage\n",
- "Vin1 = -10 # #volt # input voltage\n",
- "\n",
- "# closed loop gain of differntial op-amp is given by\n",
- "Ac = (R2/R1) #\n",
- "Ac = abs(Ac)# \n",
- "print 'The closed loop gain of differntial op-amp is = %0.2f'%Ac,' '\n",
- "\n",
- "# the output voltage of an non-inverting op-amp is given by\n",
- "Vo = (R2/R1)*(Vin2-Vin1) #\n",
- "print 'The output voltage of an non-inverting op-amp is= %0.2f'%Vo,' V '"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example 4.9 Pg 84"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 10,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " The upper voltage is = 2.86 V \n",
- " The lower voltage is = -2.86 V \n"
- ]
- }
- ],
- "source": [
- "# Determine the non-inverting input voltage\n",
- "R1 = 10 # #kilo ohm # input resistance\n",
- "R2 = 25 # #kilo ohm # feedback resistance\n",
- "Voh = 10 # # volt #output voltage\n",
- "Vol = -10 # # volt # output voltage\n",
- "\n",
- "# upper voltage\n",
- "V = (R1/(R1+R2)*Voh) #\n",
- "print ' The upper voltage is = %0.2f'%V,' V '\n",
- "\n",
- "# Lower voltage\n",
- "V = (R1/(R1+R2)*Vol) #\n",
- "print ' The lower voltage is = %0.2f'%V,' V '"
- ]
- }
- ],
- "metadata": {
- "kernelspec": {
- "display_name": "Python 2",
- "language": "python",
- "name": "python2"
- },
- "language_info": {
- "codemirror_mode": {
- "name": "ipython",
- "version": 2
- },
- "file_extension": ".py",
- "mimetype": "text/x-python",
- "name": "python",
- "nbconvert_exporter": "python",
- "pygments_lexer": "ipython2",
- "version": "2.7.9"
- }
- },
- "nbformat": 4,
- "nbformat_minor": 0
-}
generated by cgit (git 2.34.1) at 2024-12-20 08:39:23 +0000