Chapter 14 : Ic operational Amplifier and basic Op amp circuits¶

import math
#initialisation of variables
Vbe=0.7
Ib=500.0*10**-9

#Calculations
R1=Vbe/(10.0*Ib)
R1=120.0*10**3#use standard value
R2=R1
I2=100.0*Ib
Vr1=15.0
Vr2=Vr1
R1=Vr1/I2
R1=270.0*10**3#use satndard value
R2=R1
R3=(R1*R2)/(R1+R2)

#Results
print('The value of R3= %.2f kohm ' %(R3/1000))

import math

#initialisation of variables

R2=1.0*10**6
Vb=3.0
Vo=3.0
Vee=9.0

#Calculations
Vr2=Vb-(-Vee)
Vr1=Vee-Vb
I2=Vr2/R2
R1=Vr1/I2
R3=0

#Results
print('The value of R1= %.2f kohm ' %(R1/1000))

import math

#initialisation of variables

Av=200000.0
ri=2.0*10**6
ro=75.0
Vo=1.0
B=1.0

#Calculations
Vd=Vo/Av
Zi=(1+Av*B)*ri
Zo=ro/(1+Av*B)

#Results
print('The value of Zo= %.2f X 10^-3 kohm ' %(Zo*10**3))

import math
#initialisation of variables

f=70.0
Rl=4.0*10**3
Ib=500.0*10**-9
Vbe=0.7

#Calculations
R1=Vbe/(10*Ib)
R1=120*10**3#use standard value
R2=R1
print(" desire value of capacitor is C=1/2*3.14*f*R")
C2=1/(2*3.14*f*Rl)
C1=1/(2*3.14*f*(R1/10))

#Results
print('The value of C1= %.2f mF ' %(C1*10**6))

import math
#initialisation of variables

Ib=500.0*10**-9
Vi=50.0*10**-3
Vo=2.0

#Calculations
I2=100.0*Ib
R3=Vi/I2
R2=(Vo/I2)-R3
R1=(R2*R3)/(R2+R3)

#Results
print('The value of R1= %.2f kohm ' %(R1/1000))

import math

#initialisation of variables

Av=200000.0
ri=2.0*10**6
ro=75.0
R3=1.0*10**3
R2=39*10**3

#Calculations
B=R3/(R2+R3)
Zi=(1+Av*B)*ri

#Results
print(" typical input impedance for non-inverting amplifier is %.2f ohm " %Zi)
Zo=ro/(1+Av*B)
print('The value of Zo= %.2f kohm ' %(Zo*10))

import math
#initialisation of variables

R2=50.0*10**3
R3=2.2*10**3
C2=8.2*10**-6
Rl=600.0

#Calculations
print("voltage gain ")
Acl=(R3+R2)/R3

#Results
print("lower cuttoff frequency ")
f=1/(2*3.14*C2*Rl)
print('The value of f= %.2f kohm ' %(f))

import math 

#initialisation of variables

Acl=144.0
Vi=20.0*10**-3
Ib=500.0*10**-9

#Calculations
I1=100.0*Ib
R1=Vi/I1
R1=390.0   #use standard value
R2=Acl*R1
R3=(R1*R2)/(R1+R2)

#Results
print('The value of R3= %.2f kohm ' %(R3))

import math
#initialisation of variables
Acl=3.0
R4=1.0*10**6
Vi=1.0

#Calculations
R1=R4/Acl
R1=330.0*10**3#use standard value 
R2=R1
R3=R1
I1=Vi/R1
I2=I1
I3=I1
I4=I1+I2+I3
Vo=-I4*R4

#Results
print('The value of Vo= %.2f v ' %(Vo))

import math

#initialisation of variables

Ib=500.0*10**-9
Vi=1.0
Acl=10.0

#Calculations
I1=100*Ib
R1=Vi/I1
R1=18*10**3#use standard value
R2=Acl*R1
R4=R1
R3=R1/Acl

#Results
print('The value of R3= %.2f kohm ' %(R3/1000))

import math

#initialisation of variables

Vi=10*10**-3
Vn=1.0
R1=33.0*10**3
R2=300.0
R5=15.0*10**3
R4=15.0*10**3
Vi2=-10.0*10**-3
R3=R1
R6=15.0*10**3

#Calculations
R7=R6
Acl=((2*R1+R2)/R2)*(R5/R4)
print("at junction of R1 and R2")
Vb=Vi+Vn
print("at junction of R2 and R3")
Vc=Vi2+Vn
print(" current through R2")
I2=(Vb-Vc)/R2
print("at the output of A1")
Va=Vb+(I2*R1)
print("at output of A2")
Vd=Vc-(I2*R3)
print("at junction of R6 and R7")
Vf=Vd*(R7/(R6+R7))
print("at junction of R4 and R5")
Ve=Vf
print("current through R4")
I4=(Va-Ve)/R4

#Results
print("at output of A3")
Vg=Ve-(I4*R5)
print('The value of Vg= %.2f kohm ' %(Vg))

import math
#initialisation of variables

Vcc=15.0
Vee=-15.0
Av=200000.0
SR=0.5/10**-6
Vo=14.0

#Calculations
V=(Vcc-1)-(Vee+1)
Vi=Vo/Av
print("rise time of output is ")
t=(V/SR)*10**6

#Results
print("rise time of output is %d ms " %t)

#initialisation of variables
Ib=500.0*10**-9
UTP=5.0
Vcc=15.0

#Calculations
I1=100.0*Ib
R2=UTP/I1
R1=((Vcc-1)-5)/I1

#Results
print('The value of R1= %.2f kohm ' %(R1/1000))

import math
#initialisation of variables

Vcc=15.0
Vsat=Vcc
R2=150.0*10**3
Vf=0.7
R1=27.0*10**3
R3=120.0*10**3

#Calculations
I2=(Vsat-Vf)/R2
UTP=I2*R1

#Results
print(" LTP calculation including Vf")
I3=(Vsat-Vf)/R3
LTP=-I3*R1
print('The value of LTP= %.2f kohm ' %(LTP))