From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 281/CH12/EX12.1/example12_1.sce | 33 +++++++++++++++
 281/CH12/EX12.2/example12_2.sce | 52 +++++++++++++++++++++++
 281/CH12/EX12.3/example12_3.sce | 38 +++++++++++++++++
 281/CH12/EX12.4/example12_4.sce | 93 +++++++++++++++++++++++++++++++++++++++++
 281/CH12/EX12.5/example12_5.sce | 32 ++++++++++++++
 281/CH12/EX12.6/example12_6.sce | 48 +++++++++++++++++++++
 281/CH12/EX12.7/example12_7.sce | 42 +++++++++++++++++++
 281/CH12/EX12.8/example12_8.sce | 21 ++++++++++
 8 files changed, 359 insertions(+)
 create mode 100755 281/CH12/EX12.1/example12_1.sce
 create mode 100755 281/CH12/EX12.2/example12_2.sce
 create mode 100755 281/CH12/EX12.3/example12_3.sce
 create mode 100755 281/CH12/EX12.4/example12_4.sce
 create mode 100755 281/CH12/EX12.5/example12_5.sce
 create mode 100755 281/CH12/EX12.6/example12_6.sce
 create mode 100755 281/CH12/EX12.7/example12_7.sce
 create mode 100755 281/CH12/EX12.8/example12_8.sce

(limited to '281/CH12')

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")
-- 
cgit