initial commit / add all books

8 files changed, 359 insertions, 0 deletions

diff --git a/281/CH12/EX12.1/example12_1.sce b/281/CH12/EX12.1/example12_1.sce
new file mode 100755
index 000000000..68db5f67e
--- /dev/null
+++ b/281/CH12/EX12.1/example12_1.sce
@@ -0,0 +1,33 @@
+disp('chapter 12 ex12.1')

+disp('given')

+disp("the dc voltage source is designed in ex 6.1 has")

+disp("Vs=Vcc=12V    Vo=6.3V      R1=270ohm     ")

+disp("D1 is zener diode   Ilmax=42mA")

+Vs=12

+Vcc=12

+Vo=6.3

+R1=270

+Ilmax=.042

+disp("supply resistance=25 ohm")

+Rs=25

+disp("from datasheet Zz=7ohm")

+Zz=7

+disp("at 10% change in Vs")

+DVs=.1*Vs

+disp('volts',DVs)

+DVo=DVs*Zz/R1

+disp(DVo,"DVo=")

+disp("Line regulation=(DVo for 10%Vs change)*100/Vo")

+LR=(DVo)*100/Vo

+disp(LR,"LR in percentage")

+DVo=Ilmax*Rs*Zz/R1

+disp(DVo,"DVo=")

+disp("Load regulation=(DVo for DIl=Ilmax)*100/Vo")

+LR=(DVo)*100/Vo

+disp(LR,"Load regulation in percentage=")

+Vro=Zz/R1

+disp(Vro,"Vro=Vrs*")

+disp("Ripple rejection=20*log(Vrs/Vro)")

+RR=20*log10(1/Vro)

+disp(RR,"Ripple Rejection in DB=  ")

+

diff --git a/281/CH12/EX12.2/example12_2.sce b/281/CH12/EX12.2/example12_2.sce
new file mode 100755
index 000000000..5ec47db08
--- /dev/null
+++ b/281/CH12/EX12.2/example12_2.sce
@@ -0,0 +1,52 @@
+disp('chapter 12 ex12.2')

+disp('given')

+disp("output =12V")

+Vo=12

+disp("max load current=50mA")

+Il=.05

+disp("Vsmin=Vo+3 V")

+Vsmin=Vo+3 

+disp( 'volts',Vsmin)

+disp("allowing Vrs=2V(p to p)")

+Vrs=2

+disp("Vs=Vsmin+Vrs/2")

+Vs=Vsmin+Vrs/2

+disp('volts',Vs)

+disp("let Vz=Vs/2")

+Vz=Vs/2

+disp('volts',Vz)

+disp("Iz=20mA")

+Iz=.02

+disp("R1=(Vs-Vz)/Iz")

+R1=(Vs-Vz)/Iz

+disp('ohms',R1)

+disp("R1=390 ohm std value")

+R1=390

+disp("let I2>>Ibmax     I2=50uA")

+I2=50*10^(-6)

+disp("R2=(Vo-Vz)/I2")

+Vz=8.2

+R2=(Vo-Vz)/I2

+disp('ohms',R2)

+disp("R2=68kohm std value")

+R2=68000

+disp("I2=(Vo-Vz)/R2")

+I2=(Vo-Vz)/R2

+disp('amperes',I2)

+disp("R3=Vz/Iz")

+R3=Vz/I2

+disp('ohms',R3)

+disp("use 150 k ohm std value")

+R3=150000

+disp("select C1=50uF")

+C1=50*10^(-6)

+disp("Q1 specification")

+disp("Vcemax=Vsmax=Vs+Vrs/2")

+Vcemax=Vs+Vrs/2

+disp('volts',Vcemax)

+Ie=Il

+disp("P=Vce*Il=(Vs-Vo)*Il")

+P=(Vs-Vo)*Il

+disp('watts',P)

+disp("A 2N718 is a suitable device")

+

diff --git a/281/CH12/EX12.3/example12_3.sce b/281/CH12/EX12.3/example12_3.sce
new file mode 100755
index 000000000..a122c493d
--- /dev/null
+++ b/281/CH12/EX12.3/example12_3.sce
@@ -0,0 +1,38 @@
+disp('chapter 12 ex12.3')

+disp('given')

+disp("considering example 12.2")

+disp("supply source resistance=10ohm")

+Rs=10

+disp("from IN756 datasheet Zz=8ohm")

+Zz=8

+disp("At 10% change in Vs=16V is")

+Vs=16

+DVs=.1*Vs

+disp('volts',DVs)

+disp("DVo=DVs*Zz*(R2+R3)/(R1*R3)")

+disp("R2=68000  R1=390   R3=150000")

+R2=68000

+R1=390

+R3=150000

+DVo=DVs*Zz*(R2+R3)/(R1*R3)

+disp('volts',DVo)

+disp("Line regulation=(DVo for 10%Vs change)*100/Vo  and Vo=12V")

+Vo=12

+LR=(DVo)*100/Vo

+disp(LR,"LR in percentage")

+disp("for Il change of 50mA")

+Il=0.05

+disp("DVo=Il*Rs")

+DVs=Il*Rs

+disp('volts',DVs)

+DVo=DVs*Zz*(R2+R3)/(R1*R3)

+disp('volts',DVo)

+disp("Load regulation=(DVo for DIl=Ilmax)*100/Vo")

+LR=(DVo)*100/Vo

+disp(LR,"Load regulation in percentage=")

+disp("Vro=Vrs*Zz*(R2+R3)/(R1*R3)")

+y=Zz*(R2+R3)/(R1*R3)

+disp(y,"Vro=Vrs*")

+disp("Ripple rejection=20*log(Vrs/Vro)")

+RR=20*log10(1/y)

+disp(RR,"Ripple Rejection in DB=  ")

diff --git a/281/CH12/EX12.4/example12_4.sce b/281/CH12/EX12.4/example12_4.sce
new file mode 100755
index 000000000..543aa0a08
--- /dev/null
+++ b/281/CH12/EX12.4/example12_4.sce
@@ -0,0 +1,93 @@
+disp('chapter 12 ex12.4')

+disp('given')

+disp("output =10V to 15V")

+Vomax=15

+disp("max load current=4000mA")

+Il=.4

+disp("Vsmin=Vomax+3 V")

+Vsmin=Vomax+3 

+disp('volts',Vsmin)

+disp("allowing Vrs=3V(p to p)")

+Vrs=3

+disp("Vs=Vsmin+Vrs/2")

+Vs=Vsmin+Vrs/2

+disp('volts',Vs)

+disp("ZENER CIRCUIT")

+disp("let Vz=Vo/2")

+Vz=Vomax/2

+disp('volts',Vz)

+disp("Iz=20mA")

+Iz=.02

+disp("R1=(Vo-Vz)/Iz")

+R1=(Vomax-Vz)/Iz

+disp('ohms',R1)

+disp("R1=330 ohm std value")

+R1=390

+disp("POTENTIAL DIVIDER")

+disp("let I2>>Ibmax     I2=50uA Vomin=10")

+I2=50*10^(-6)

+Vomin=10

+disp("R2=(Vomin-Vz)/I2")

+Vz=7.5

+R2=(Vomin-Vz)/I2

+disp('ohms',R2)

+disp("R2=47kohm std value")

+R2=47000

+disp("I2=(Vomin-Vz)/R2")

+I2=(Vomin-Vz)/R2

+disp('amperes',I2)

+disp("R34=R3+R4=Vz/Iz")

+R34=Vz/I2

+disp('ohms',R34)

+disp("when Vo is at its max,moving contact is at bottom of R4")

+disp("I2=Vomax/(R2+R34)")

+I2=Vomax/(R2+R34)

+disp('amperes',I2)

+disp("R3=Vz/Iz")

+R3=Vz/I2

+disp('ohms',R3)

+disp("use 100 k ohm std value")

+R3=100000

+disp("R4=(R3+R4)-R3")

+R4=R34-R3

+disp('ohms',R4)

+disp("use 50 k ohm std value")

+disp("CAPACITOR")

+disp("select C1=100uF")

+C1=100*10^(-6)

+disp("Q1 specification")

+disp("Vcemax=Vsmax=Vs+Vrs/2")

+Vcemax=Vs+Vrs/2

+disp('volts',Vcemax)

+Ie=Il

+disp("P=Vce*Il=(Vs-Vomin)*Il")

+P=(Vs-Vomin)*Il

+disp('watts',P)

+disp("A 2N3055 is a suitable device")

+disp("Q2 specification")

+disp("Vcemax=Vsmax=Vs+Vrs/2")

+Vcemax=Vs+Vrs/2

+disp('volts',Vcemax)

+disp("Ie=Il/hFE1 ,hFE1=20 for Q1")

+hFE1=20

+Ie=Il/hFE1

+disp('amperes',Ie)

+disp("P=Vce*Il=(Vs-Vomin)*Il")

+P=(Vs-Vomin)*Il

+disp('watts',P)

+disp("A 2N3904 is a suitable device")

+disp("R5 Calculation")

+disp("let Ie2min=0.5mA,Vbe1=0.7")

+Ie2min=0.5*10^(-3)

+Vbe1=0.7

+disp("R5=(Vomin+Vbe1)/Ie2min")

+R5=(Vomin+Vbe1)/Ie2min

+disp('ohms',R5)

+disp("R5=18kohm std value")

+disp("OPERATIONAL AMPLIFIER")

+disp("because I2 is sselected for bipolar opamp either a bipolar or BIFEt opamp can be used")

+disp("supply voltage Vs=19.5V")

+Vs=19.5

+disp("Input supply voltage range=Vs/2-Vz")

+ipvoltage==(Vs/2)-Vz

+disp('volts',ipvoltage)
\ No newline at end of file
diff --git a/281/CH12/EX12.5/example12_5.sce b/281/CH12/EX12.5/example12_5.sce
new file mode 100755
index 000000000..079fc42ac
--- /dev/null
+++ b/281/CH12/EX12.5/example12_5.sce
@@ -0,0 +1,32 @@
+disp('chapter 12 ex12.5')

+disp('given')

+disp("voltage regulator in 12.2 to have short circuit o/p current=60mA")

+Isc=.06

+disp("R6=0.5/Isc")

+R6=0.5/Isc

+disp('ohms',R6)

+disp("Let Ic3=5mA")

+Ic3=.005

+disp("R7=Vs/Ic3")

+disp("Vs=16")

+Vs=16

+R7=Vs/Ic3

+disp('ohms',R7)

+disp("Ib1max=Ilmax/hfe1   Ilmax=50mA  hfe1=50")

+hfe1=50

+Ilmax=.05

+Ib1max=Ilmax/hfe1

+disp('amperes',Ib1max)

+disp("Vr7=1mA*R7")

+Vr7=.001*3300

+disp('volts',Vr7)

+disp("yhis volatage drop is too large for circuit to operate satisfactorily")

+disp("to overcome we make use of darlington pair ")

+disp("hfe2=50")

+hfe2=50

+disp("Ib2max=Ilmax/(hfe1*hfe2)")

+Ib2max=Ilmax/(hfe1*hfe2)

+disp('amperes',Ib2max)

+disp("under normal operating conditions Vr7=Ib2max*R7")

+Vr7=Ib2max*3300

+disp('volts',Vr7)

diff --git a/281/CH12/EX12.6/example12_6.sce b/281/CH12/EX12.6/example12_6.sce
new file mode 100755
index 000000000..062d777c7
--- /dev/null
+++ b/281/CH12/EX12.6/example12_6.sce
@@ -0,0 +1,48 @@
+disp('chapter 12 ex12.6')

+disp('given')

+disp("design feedback limit for 12.4 and max circuit o/p current=400mA when limited foldback to 200mA")

+Ilmax=0.4

+Isc=0.2

+disp("Vr6=0.5 at short circuit")

+disp("R6=0.5/Isc")

+R6=0.5/Isc

+disp('ohms',R6)

+disp("use 2.7 ohm std value")

+R6=2.7

+disp("Vr6=Ilmax*R6")

+Vr6=Ilmax*R6

+disp('volts',Vr6)

+disp("Vr8=Vr6-0.5    Vr6=1")

+Vr8=1-0.5

+disp('volts',Vr8)

+disp("Ir8>>Ib3    hfe3=50  Ic3=5mA")

+Ic3=0.005

+hfe3=50

+disp("Ib3=Ic3/hfe3")

+Ib3=Ic3/hfe3

+disp('amperes',Ib3)

+disp("let Ir8=1mA")

+Ir8=0.001

+disp("R8=Vr8/Ir8")

+R8=Vr8/Ir8

+disp('ohms',R8)

+disp("use 470 ohm std value")

+R8=470

+disp("using average level of Vo=12.5")

+Vo=12.5

+disp("R9=(Vo-Vr8)/Ir8")

+R9=(Vo-Vr8)/Ir8

+disp('ohms',R9)

+disp("R7=Vs/Ic3    Vs=19.5")

+Vs=19.5

+R7=Vs/Ic3

+disp('ohms',R7)

+disp("hfe2=50    hfe1=20")

+hfe2=50

+hfe1=20

+disp("Ib2max=Ilmax/(hfe1*hfe2)")

+Ib2max=Ilmax/(hfe1*hfe2)

+disp('amperes',Ib2max)

+disp(" Vr7=Ib2max*R7")

+Vr7=Ib2max*R7

+disp('volts',Vr7)

diff --git a/281/CH12/EX12.7/example12_7.sce b/281/CH12/EX12.7/example12_7.sce
new file mode 100755
index 000000000..97169c27b
--- /dev/null
+++ b/281/CH12/EX12.7/example12_7.sce
@@ -0,0 +1,42 @@
+disp('chapter 12 ex12.7')

+disp('given')

+disp("voltage regulator to have o/p voltage=18V")

+Vo=18

+disp("I2>>error amplifier input bias current")

+disp("Let I2=1mA")

+I2=0.001

+disp("Vr2=Vref=7.15")

+Vr2=7.15

+Vref=7.15

+disp("R2=Vref/I2")

+R2=Vref/I2

+disp('ohms',R2)

+disp("use 6.8 kohm std value")

+R2=6800

+disp("I2=7.15/6.8k")

+I2=7.15/6800

+disp('amperes',I2)

+disp("R1=(Vo-Vr2)/I2")

+R1=(Vo-Vr2)/I2

+disp('ohms',R1)

+disp("use 10 kohm std value")

+R1=10000

+disp("for satisfactory operatiom of series pass transistor")

+disp("Let Vs-Vo=5V   Vs=Vo+5  ")

+Vs=Vo+5

+disp('volts',Vs)

+disp("Inteernal circuit current is approximately ")

+disp("I=Istandby+Iref=25mA")

+I=0.025

+disp("Internal power dissipation excluding series pass transistor ")

+disp("Pi=(Istandby+Iref)*Vs")

+Pi=(I)*Vs

+disp('watts',Pi)

+disp("Maximum power dissipated in series pass transistor")

+disp("P=(specified Pdmax)-Pi    Pdmax=1000mW")

+Pdmax=1

+P=Pdmax-Pi

+disp('watts',P)

+disp("Maximum load current=P/(Vs-Vo)")

+Ilmax=P/(Vs-Vo)

+disp('amperes',Ilmax)

diff --git a/281/CH12/EX12.8/example12_8.sce b/281/CH12/EX12.8/example12_8.sce
new file mode 100755
index 000000000..ae48d5b9b
--- /dev/null
+++ b/281/CH12/EX12.8/example12_8.sce
@@ -0,0 +1,21 @@
+disp('chapter 12 ex12.8')

+disp('given')

+disp("voltage regulator to have o/p voltage=9V")

+Vo=9

+disp("I1>>(Iadj=100uA)")

+disp("Let I1=5mA")

+I1=0.005

+disp("R1=Vref/I1   Vref=1.25V")

+Vref=1.25

+R1=Vref/I1

+disp('ohms',R1)

+disp("use 270ohm std value and recalculate I1")

+R1=270

+disp("I1=Vref/R1")

+I1=Vref/R1

+disp('amperes',I1)

+disp("R2=(Vo-Vr1)/I1, Vr1=1.25")

+Vr1=1.25

+R2=(Vo-Vr1)/I1

+disp('ohms',R2)

+disp("use 1.5kohm and 220 ohm in series")