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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Chapter 16 Op-Amp Negative Feedback"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 16.1 Page No 385"
]
},
{
"cell_type": "code",
"execution_count": 3,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The output voltage = 49.98 mV\n",
"The error voltage = 0.50 µV\n"
]
}
],
"source": [
"# given data\n",
"A=100000.0##unit less\n",
"R1= 98.0*10**3## Ω\n",
"R2= 2.0*10**3## Ω\n",
"Vin= 1.*10**-3## V\n",
"B= R2/(R1+R2)## unit less\n",
"A_CL= 1/B## unit less\n",
"A_CL= A/(1+A*B)## unit less\n",
"# The output voltage \n",
"Vout= Vin*A_CL## V\n",
"# The error voltage \n",
"Verror= Vout/A## V\n",
"Vout= Vout*10**3## mV\n",
"Verror= Verror*10**6## µV\n",
"print \"The output voltage = %.2f mV\"%Vout\n",
"print \"The error voltage = %.2f µV\"%Verror"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 16.2 Page No 386"
]
},
{
"cell_type": "code",
"execution_count": 4,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The value of A_CL = 49.88\n",
"The value of Vout = 49.88 mV\n",
"The value of Verror = 2.49 µV\n"
]
}
],
"source": [
"# given data\n",
"A=20000#\n",
"B= 0.02#\n",
"Vin= 1## mV\n",
"Vin= Vin*10**-3## V\n",
"# The closed loop voltage gain,\n",
"A_CL= A/(1+A*B)#\n",
"# The output voltage,\n",
"Vout= Vin*A_CL## V\n",
"# The error voltage,\n",
"Verror= Vout/A## V\n",
"Vout= Vout*10**3## mV\n",
"Verror= Verror*10**6## µV\n",
"print \"The value of A_CL = %.2f\"%A_CL\n",
"print \"The value of Vout = %.2f mV\"%Vout\n",
"print \"The value of Verror = %.2f µV\"%Verror"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 16.3 Page No 389"
]
},
{
"cell_type": "code",
"execution_count": 5,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The closed loop input impedence = 201.80 MΩ\n",
"The closed loop output impedence = 0.74 Ω\n"
]
}
],
"source": [
"# given data\n",
"A=100000.0#\n",
"R1= 100.0*10**3## Ω\n",
"R2= 100.0## Ω\n",
"r_in= 2.0*10**6## Ω\n",
"r_out= 75.0## Ω\n",
"B= R2/(R1+R2)## unit less\n",
"# The closed loop input impedence \n",
"r_in_CL= (1+A*B)*r_in## Ω\n",
"# The closed loop output impedence \n",
"r_out_CL= r_out/(1+A*B)## Ω\n",
"r_in_CL=r_in_CL*10**-6## Mohm\n",
"print \"The closed loop input impedence = %.2f MΩ\"%r_in_CL\n",
"print \"The closed loop output impedence = %.2f Ω\"%r_out_CL"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 16.4 Page No 389"
]
},
{
"cell_type": "code",
"execution_count": 11,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The closed loop voltage gain = 1.00\n",
"The closed-loop input impedance = 202.00 MΩ\n",
"The closed-loop output impedance = 7.50e-04 Ω\n",
"The output offset voltage = 5.51 mV\n"
]
}
],
"source": [
"# given data\n",
"A=100.0#\n",
"R_B= 39.0*10**3## Ω\n",
"r_in= 2.0*10**6## Ω\n",
"r_out= 75.0## Ω\n",
"Vin_off= 2.0*10**-3## V\n",
"I_B1= 90.0*10**-9## A\n",
"I_in_off= 20.0*10**-9## A\n",
"# The closed loop voltage gain \n",
"B=1## unit less\n",
"# The closed-loop input impedance\n",
"r_in_CL= (1.0+A*B)*r_in## Ω\n",
"r_in_CL= r_in_CL*10**-6## Mohm\n",
"print \"The closed loop voltage gain = %.2f\"%B\n",
"print \"The closed-loop input impedance = %.2f MΩ\"%r_in_CL\n",
"A=100000.0#\n",
"# The closed-loop output impedance\n",
"r_out_CL= r_out/A## Ω\n",
"print \"The closed-loop output impedance = %.2e Ω\"%r_out_CL\n",
"#Let V= V1-V2 = Vin_off+I_B1*R_B\n",
"V= Vin_off+I_B1*R_B## A\n",
"# The output offset voltage \n",
"Voo_CL= A*V/A## V\n",
"Voo_CL= Voo_CL*10**3## mV\n",
"print \"The output offset voltage = %.2f mV\"%Voo_CL"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 16.5 Page No 393"
]
},
{
"cell_type": "code",
"execution_count": 12,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The closed-loop voltage gain = 22.00\n",
"The desensitivity = 4545.45\n"
]
}
],
"source": [
"# given data\n",
"R_F= 22.0*10**3## Ω\n",
"R_S= 1.0*10**3## Ω\n",
"A= 100000.0## unit less\n",
"# The closed-loop voltage gain\n",
"A_CL= R_F/R_S#\n",
"# The desensitivity\n",
"desensitivity= A/A_CL#\n",
"print \"The closed-loop voltage gain = %.2f\"%A_CL\n",
"print \"The desensitivity = %.2f\"%desensitivity"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 16.6 Page No 396"
]
},
{
"cell_type": "code",
"execution_count": 13,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"For A_CL= 1000, The value of f_CL = 1.00 kHz\n",
"For A_CL= 100, The value of f_CL = 10.00 kHz\n",
"For A_CL= 10, The value of f_CL = 100.00 kHz\n",
"For A_CL= 1, The value of f_CL = 1.00 MHz\n"
]
}
],
"source": [
"# given data\n",
"f_unity= 1.0*10**6## Hz\n",
"# For A_CL= 1000, The value of f_CL\n",
"A_CL= 1000.0#\n",
"f_CL= f_unity/A_CL## Hz\n",
"f_CL= f_CL*10**-3## kHz\n",
"print \"For A_CL= 1000, The value of f_CL = %.2f kHz\"%f_CL\n",
"# For A_CL= 100, The value of f_CL\n",
"A_CL= 100.0#\n",
"f_CL= f_unity/A_CL## Hz\n",
"f_CL= f_CL*10**-3## kHz\n",
"print \"For A_CL= 100, The value of f_CL = %.2f kHz\"%f_CL\n",
"# For A_CL= 10, The value of f_CL\n",
"A_CL= 10.0#\n",
"f_CL= f_unity/A_CL## Hz\n",
"f_CL= f_CL*10**-3## kHz\n",
"print \"For A_CL= 10, The value of f_CL = %.2f kHz\"%f_CL\n",
"# For A_CL= 1, The value of f_CL\n",
"A_CL= 1.0#\n",
"f_CL= f_unity/A_CL## Hz\n",
"f_CL= f_CL*10**-6## MHz\n",
"print \"For A_CL= 1, The value of f_CL = %.2f MHz\"%f_CL"
]
}
],
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"kernelspec": {
"display_name": "Python 2",
"language": "python",
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"language_info": {
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|
