initial commit / add all books

31 files changed, 396 insertions, 0 deletions

diff --git a/275/CH1/EX1.1.11/Ch1_1_11.sce b/275/CH1/EX1.1.11/Ch1_1_11.sce
new file mode 100755
index 000000000..1fa3f5981
--- /dev/null
+++ b/275/CH1/EX1.1.11/Ch1_1_11.sce
@@ -0,0 +1,17 @@
+clc

+disp("Example 1.11")

+printf("\n")

+disp("findout resistance and cut in voltage")

+printf("Given\n")

+disp("forward current=100mA,Vr=25V,cut in voltage=0.7v,reverse current=100nA")

+//all the values are from fig 1.10

+Vf=0.35

+If=80*10^-3 //forward current

+Vr=40       

+Ir=10^-6  //reverse current

+Rf=Vf/If      

+Rr=Vr/Ir

+printf("static forward resistance=\n%f ohm\n",Rf)

+printf("static reverse resistance=\n%f ohm\n",Rr)

+//from the characteristic curve we can find cut in voltage

+printf("cut in voltage= 0.3V")

diff --git a/275/CH1/EX1.1.20/Ch1_1_20.sce b/275/CH1/EX1.1.20/Ch1_1_20.sce
new file mode 100755
index 000000000..a0debd134
--- /dev/null
+++ b/275/CH1/EX1.1.20/Ch1_1_20.sce
@@ -0,0 +1,20 @@
+clc

+disp("Example 1.20")

+printf("\n")

+disp("calculate dynamic and substrate resistance")

+printf("Given\n")

+disp("forward current=20mA,cut in voltage=0.33v")

+If=20*10^-3

+Vf=0.33

+Rf=Vf/If

+If1=If-(10^-2)  //min forward current 

+If2=If+(10^-2)  //max forward current

+Vf1=0.31

+Vf2=0.35

+rd=(Vf2-Vf1)/(If2-If1)

+rd1=0.026/If

+rsub=rd-rd1

+printf("static forward resistance=\n%f ohm\n",Rf)

+printf("Dynamic resistance=\n%f ohm\n",rd)

+printf("Dynamic resistance using forward current=\n%f ohm\n",rd1)

+printf("substrate resistance=\n%f ohm\n",rsub)

diff --git a/275/CH1/EX1.1.24/Ch1_1_24.sce b/275/CH1/EX1.1.24/Ch1_1_24.sce
new file mode 100755
index 000000000..217e12ea8
--- /dev/null
+++ b/275/CH1/EX1.1.24/Ch1_1_24.sce
@@ -0,0 +1,11 @@
+clc

+disp("Example 1.24")

+printf("\n")

+disp("calculate the current in the circuit in fig 1.18")

+//given

+V=12

+R1=10^3

+R2=2*10^3

+//current

+I=V/(R1+R2)

+printf("current in the circuit=%f Ampere",I)

diff --git a/275/CH1/EX1.1.25/Ch1_1_25.sce b/275/CH1/EX1.1.25/Ch1_1_25.sce
new file mode 100755
index 000000000..fe9ad3cdc
--- /dev/null
+++ b/275/CH1/EX1.1.25/Ch1_1_25.sce
@@ -0,0 +1,11 @@
+clc

+disp("Example 1.25")

+printf("\n")

+disp("calculate the diode current")

+//given

+V=12

+R=10^3

+Vd=0.7

+//diode current

+I=(V-Vd)/R

+printf("Diode current=%f Ampere",I)

diff --git a/275/CH1/EX1.1.26/Ch1_1_26.sce b/275/CH1/EX1.1.26/Ch1_1_26.sce
new file mode 100755
index 000000000..ce18fda74
--- /dev/null
+++ b/275/CH1/EX1.1.26/Ch1_1_26.sce
@@ -0,0 +1,12 @@
+clc

+disp("Example 1.26")

+printf("\n")

+disp("calculate the diode current across 2 diodes")

+//given

+V=12

+Vd1=0.7

+Vd2=0.7

+R=10^3

+//current

+I=(V-(Vd1+Vd2))/R

+printf("Diode current =%f Ampere",I)

diff --git a/275/CH1/EX1.1.27/Ch1_1_27.sce b/275/CH1/EX1.1.27/Ch1_1_27.sce
new file mode 100755
index 000000000..376aeb5e7
--- /dev/null
+++ b/275/CH1/EX1.1.27/Ch1_1_27.sce
@@ -0,0 +1,11 @@
+clc

+disp("Example 1.27")

+printf("\n")

+disp("find the forward current in circuit of fig 1.22")

+//given

+V=9

+Vd=0.3

+R=3.3*10^3

+//current

+I=(V-Vd)/R

+printf("forward current=%f Ampere",I)

diff --git a/275/CH1/EX1.1.28/Ch1_1_28.sce b/275/CH1/EX1.1.28/Ch1_1_28.sce
new file mode 100755
index 000000000..e7130a77a
--- /dev/null
+++ b/275/CH1/EX1.1.28/Ch1_1_28.sce
@@ -0,0 +1,11 @@
+clc

+disp("Example 1.28")

+printf("\n")

+disp("find out battery voltage")

+//given

+R=2.7*10^3

+Vd=0.7

+I=1.96*10^-3

+//battery voltage

+V=(I*R)+Vd

+printf("battery voltage=%f volt",V)

diff --git a/275/CH1/EX1.1.29/Ch1_1_29.sce b/275/CH1/EX1.1.29/Ch1_1_29.sce
new file mode 100755
index 000000000..9f9b4ce1d
--- /dev/null
+++ b/275/CH1/EX1.1.29/Ch1_1_29.sce
@@ -0,0 +1,11 @@
+clc

+disp("Example 1.29")

+printf("\n")

+disp("find out series resistance")

+//given

+V=4.5

+Vd=0.3

+I=1.25*10^-3

+//series resistance

+R=(V-Vd)/I

+printf("series resistance=%f ohm",R)

diff --git a/275/CH1/EX1.1.31/Ch1_1_31.sce b/275/CH1/EX1.1.31/Ch1_1_31.sce
new file mode 100755
index 000000000..5fc380b2a
--- /dev/null
+++ b/275/CH1/EX1.1.31/Ch1_1_31.sce
@@ -0,0 +1,12 @@
+clc

+disp("Example 1.31")

+printf("\n")

+disp("Plot the piecewise-linear characteristic of silicon diode")

+printf("Given\n")

+//given

+Vf=[0 0.7 0.74]

+If=[0 0 0.2]

+plot2d(Vf, If)

+xlabel("Vf")

+ylabel("If")

+xtitle("Piecewise-linear characteristic of diode")

diff --git a/275/CH1/EX1.1.31/Ch1_31.png b/275/CH1/EX1.1.31/Ch1_31.png
new file mode 100755
index 000000000..ce975c5e0
--- /dev/null
+++ b/275/CH1/EX1.1.31/Ch1_31.png
diff --git a/275/CH1/EX1.1.32/Ch1_1_32.sce b/275/CH1/EX1.1.32/Ch1_1_32.sce
new file mode 100755
index 000000000..ea112c9c7
--- /dev/null
+++ b/275/CH1/EX1.1.32/Ch1_1_32.sce
@@ -0,0 +1,12 @@
+clc

+disp("Example 1.32")

+printf("\n")

+disp("Plot the piecewise-linear characterisic of Germanium diode")

+printf("Given\n")

+//given

+Vf=[0 0.3 0.35]

+If=[0 0 0.1]

+plot2d(Vf, If)

+xlabel("Vf")

+ylabel("If")

+xtitle("Piecewise-linear characteristic of diode")
\ No newline at end of file
diff --git a/275/CH1/EX1.1.32/Ch1_32.png b/275/CH1/EX1.1.32/Ch1_32.png
new file mode 100755
index 000000000..2efe096fb
--- /dev/null
+++ b/275/CH1/EX1.1.32/Ch1_32.png
diff --git a/275/CH1/EX1.1.34/Ch1_1_34.sce b/275/CH1/EX1.1.34/Ch1_1_34.sce
new file mode 100755
index 000000000..2984e3be1
--- /dev/null
+++ b/275/CH1/EX1.1.34/Ch1_1_34.sce
@@ -0,0 +1,18 @@
+clc

+disp("Example 1.34")

+printf("\n")

+disp("find out diode current")

+//given

+V=2

+Vr=0.6

+rd1=0

+rd2=0.2

+R=14

+//when rd=0

+//diode current

+I1=(V-Vr)/R

+printf("Diode current when rd=0 is \n%f ampere\n",I1)

+//when rd=0.2

+//diode current

+I2=(V-Vr)/(R+rd2)

+printf("Diode current when rd=0.2 is \n%f ampere\n",I2)

diff --git a/275/CH1/EX1.1.35/Ch1_1_35.sce b/275/CH1/EX1.1.35/Ch1_1_35.sce
new file mode 100755
index 000000000..e7498ceac
--- /dev/null
+++ b/275/CH1/EX1.1.35/Ch1_1_35.sce
@@ -0,0 +1,11 @@
+clc

+disp("Example 1.35")

+printf("\n")

+disp("find out series resistance in circuit fig 1.32")

+V=3

+rd=0.5

+Vr=0.3

+IF=174*10^-3

+//resistance

+R=(V-Vr-(IF*rd))/IF

+printf("The value of resistance is \n%f ohm\n",R)

diff --git a/275/CH1/EX1.1.48/Ch1_1_48.sce b/275/CH1/EX1.1.48/Ch1_1_48.sce
new file mode 100755
index 000000000..11897c26b
--- /dev/null
+++ b/275/CH1/EX1.1.48/Ch1_1_48.sce
@@ -0,0 +1,15 @@
+clc

+disp("Example 1.48")

+printf("\n")

+disp("Find the maximum forward current")

+T1=25          //to find maximum forward current at this temperature

+T2=65          //to find maximum forward current at this temperature

+PT1=600*10^-3  //maximum power dissipation at 25c

+D=5*10^-3      //derating factor

+VT1=0.6        //forward voltage drop(constant at all temperature)

+VT2=VT1

+IT1=PT1/VT1    //maximum forward current at T1

+PT2=PT1-((T2-T1)*D)

+IT2=PT2/VT2    //maximum forward current at T2

+printf("Forward current at temperature T1=\n%f Ampere\n",IT1)

+printf("Forward current at temperature T2=\n%f Ampere\n",IT2)

diff --git a/275/CH1/EX1.1.49/Ch1_1_49.sce b/275/CH1/EX1.1.49/Ch1_1_49.sce
new file mode 100755
index 000000000..e8cac0e16
--- /dev/null
+++ b/275/CH1/EX1.1.49/Ch1_1_49.sce
@@ -0,0 +1,21 @@
+clc

+disp("Example 1.49")

+printf("\n")

+disp("find the maximum forward current at 25c and 80c")

+printf("Given\n")

+T1=25            //to find maximum forward current at this temperature

+T2=80            //to find maximum forward current at this temperature

+VT1=0.65         //forward voltage drop(constant at all temperature)

+VT2=VT1

+PT1=80*10^-3     //maximum power dissipation at 80c

+PT2=30*10^-3     //maximum power dissipation at 30c

+IT1=PT1/VT1

+IT2=PT2/VT2

+T=[0 25 80 114]

+P=[80 80 30 0]

+plot2d(T,P)

+xlabel("Temperature in c")

+ylabel("Power in mW")

+xtitle("Power-Temperature curve")

+printf("Forward current at T1=\n%f Ampere\n",IT1)

+printf("Forward current at T2=\n%f Ampere\n",IT2)

diff --git a/275/CH1/EX1.1.49/Ch1_49.png b/275/CH1/EX1.1.49/Ch1_49.png
new file mode 100755
index 000000000..a0267a449
--- /dev/null
+++ b/275/CH1/EX1.1.49/Ch1_49.png
diff --git a/275/CH1/EX1.1.50/Ch1_1_50.sce b/275/CH1/EX1.1.50/Ch1_1_50.sce
new file mode 100755
index 000000000..5fbbe9983
--- /dev/null
+++ b/275/CH1/EX1.1.50/Ch1_1_50.sce
@@ -0,0 +1,10 @@
+clc

+disp("Example 1.50")

+printf("\n")

+disp("Find the maximum power at 80c")

+T1=25

+PT1=1000*10^-3    //maximum power dissipation at 25c

+T2=80        

+D=4*10^-3         //derating factor

+PT2=PT1-((T2-T1)*D)   //maximum power dissipation at 80c

+printf("Maximum Power dissipated at 80c=\n%f watt\n",PT2)

diff --git a/275/CH1/EX1.1.51/Ch1_1_51.sce b/275/CH1/EX1.1.51/Ch1_1_51.sce
new file mode 100755
index 000000000..80ef1b188
--- /dev/null
+++ b/275/CH1/EX1.1.51/Ch1_1_51.sce
@@ -0,0 +1,28 @@
+clc

+disp("Example 1.51")

+printf("\n")

+disp("Find the maximum forward current and Draw power spectrum curve")

+printf("Given\n")

+T1=25

+PT1=1000*10^-3    //maximum power dissipation at 25c

+//Average current

+IT1=500*10^-3      

+IT2=IT1

+VT2=0.8          //forward voltage drop

+D=10^-2

+PT2=VT2*IT2      

+T2=((PT1-PT2)/D)+T1

+//to caculate maximum forward current at 75c

+T2!=75

+PT2!=PT1-((T2!-T1)*D)

+IT2=PT2!/VT2

+//for(T>25), to draw graph

+  vd=10^-2

+  PT=(1000-(75*10))*10^-3  //maximum power dissipation at 100c

+Temp=[0 25 100 125]        

+p=[1000 1000 PT*10^3 0]

+plot2d(Temp ,p)

+xlabel("Temperature in c")

+ylabel("Power in mW")

+xtitle("Power-Temperature Curve")

+printf("Maximum forward current at 75c=\n%f Ampere\n",IT2)

diff --git a/275/CH1/EX1.1.51/Ch1_51.png b/275/CH1/EX1.1.51/Ch1_51.png
new file mode 100755
index 000000000..331c3cb68
--- /dev/null
+++ b/275/CH1/EX1.1.51/Ch1_51.png
diff --git a/275/CH1/EX1.1.54/Ch1_1_54.sce b/275/CH1/EX1.1.54/Ch1_1_54.sce
new file mode 100755
index 000000000..c26281a95
--- /dev/null
+++ b/275/CH1/EX1.1.54/Ch1_1_54.sce
@@ -0,0 +1,17 @@
+clc

+disp("Example 1.54")

+printf("\n")

+disp("Find the forward voltage drop at 100c and dynamic resistance")

+T1=25

+T2=100

+Vft1=0.6    //forward voltage drop at 25c

+IT1=26*10^-3  //forward current(constant)

+IT2=IT1

+//for silicon diode we know that 

+v=(-1.8*10^-3)

+Vft2=Vft1+((T2-T1)*v)  

+IF=26*10^-3

+rd1=(26*10^-3/IF)*((T1+273)/298)

+rd2=(26*10^-3/IF)*((T2+273)/298)

+printf("Forward voltage drop at 100c=\n%f volt\n",Vft2)

+printf("Dynamic resistance at 25c and 100c=\n%f ohm\n%f ohm\n",rd1,rd2)

diff --git a/275/CH1/EX1.1.55/Ch1_1_55.sce b/275/CH1/EX1.1.55/Ch1_1_55.sce
new file mode 100755
index 000000000..405e26ed1
--- /dev/null
+++ b/275/CH1/EX1.1.55/Ch1_1_55.sce
@@ -0,0 +1,17 @@
+clc

+disp("Example 1.55")

+printf("\n")

+disp("Calculate maximum & minimum forward voltage drop and Junction dynamic resistance")

+T1=80

+T2=10

+T=25

+//for germanium diode

+v=(-2.2*10^-3)

+Vft1=0.3

+Vft2maximum=Vft1+((T2-T)*v)    //voltage drop at 10c

+Vft2minimum=Vft1+((T1-T)*v)    //voltage drop at 80c

+IF=20*10^-3

+rd1=(26*10^-3/IF)*((T2+273)/298)

+rd2=(26*10^-3/IF)*((T1+273)/298)

+printf("Maximum and Minimum Forward voltage drop at 25c and 10c=\n%f volt\n%f volt\n",Vft2maximum,Vft2minimum)

+printf("Dynamic resistance at 10c and 80c=\n%f ohm\n%f ohm\n",rd1,rd2)

diff --git a/275/CH1/EX1.1.56/Ch1_1_56.sce b/275/CH1/EX1.1.56/Ch1_1_56.sce
new file mode 100755
index 000000000..7556d6790
--- /dev/null
+++ b/275/CH1/EX1.1.56/Ch1_1_56.sce
@@ -0,0 +1,21 @@
+clc

+disp("Example 1.56")

+printf("\n")

+disp("To find maximum forward current at 25c & 75c and Forward voltage drop and Dynamic resistance")

+PT1=1.5

+VT1=0.9

+D=7.5*10^-3

+//for silicon diodes 

+v=(-1.8*10^-3)

+IF=20*10^-3

+T1=25

+T2=75

+IT1=PT1/VT1

+PT2=PT1-((T2-T1)*D)

+IT2=PT2/VT1   //assume voltage drop remains constant at all temperature

+VF2=VT1+((T2-T1)*v)

+rd1=(26*10^-3/IF)*((T1+273)/298)

+rd2=(26*10^-3/IF)*((T2+273)/298)

+printf("Maximum forward current at 25c & 75c =\n%f Ampere\n%f Ampere\n",IT1,IT2)

+printf("Forward voltage drop at 75c=\n%f volt\n",VF2)

+printf("Dynamic resistance at 25c and 75c=\n%f ohm\n%f ohm\n",rd1,rd2)

diff --git a/275/CH1/EX1.1.57/Ch1_1_57.sce b/275/CH1/EX1.1.57/Ch1_1_57.sce
new file mode 100755
index 000000000..4f7e786db
--- /dev/null
+++ b/275/CH1/EX1.1.57/Ch1_1_57.sce
@@ -0,0 +1,23 @@
+clc

+disp("Example 1.57")

+printf("\n")

+disp("To find diode current at 25c and 75c")

+RL=150

+//both diode voltage drop as given in fig 1.47

+Vr1=0.7   //for silicon

+Vr2=0.3   //for Germanium

+Vdc=5

+//apply KVL to given circuit

+IF1=(Vdc-(Vr1+Vr2))/RL

+//for silicon diode 

+v=(-1.8*10^-3)

+T1=25

+T2=75

+VFT2=Vr1+((T2-T1)*v)

+//for Germanium Diode

+v=(-2.2*10^-3)

+VFT2!=Vr2+((T2-T1)*v)

+IF2=(Vdc-(VFT2!+VFT2))/RL

+printf("Diode current at 25c and 75c =\n%f ampere\n%f ampere\n",IF1,IF2)

+

+

diff --git a/275/CH1/EX1.1.65/Ch1_1_65.sce b/275/CH1/EX1.1.65/Ch1_1_65.sce
new file mode 100755
index 000000000..ac20fba8c
--- /dev/null
+++ b/275/CH1/EX1.1.65/Ch1_1_65.sce
@@ -0,0 +1,8 @@
+clc

+disp("Example 1.65")

+printf("\n")

+disp("Find the minimal fall-time")

+//reverse-recovery time is

+trr=4*10^-9

+tfmin=10*trr

+printf("The minimal fall-time for voltage pulses applied=\n%3.2e sec\n",tfmin)

diff --git a/275/CH1/EX1.1.66/Ch1_1_66.sce b/275/CH1/EX1.1.66/Ch1_1_66.sce
new file mode 100755
index 000000000..cce24b083
--- /dev/null
+++ b/275/CH1/EX1.1.66/Ch1_1_66.sce
@@ -0,0 +1,8 @@
+clc

+disp("Example 1.66")

+printf("\n")

+disp("Find the maximum recovery time")

+//fall-time is

+tf=0.5*10^-6

+trrmax=tf/10

+printf("The minimal fall-time for voltage pulses applied=\n%3.2e sec\n",trrmax)

diff --git a/275/CH1/EX1.1.72/Ch1_1_72.sce b/275/CH1/EX1.1.72/Ch1_1_72.sce
new file mode 100755
index 000000000..9b097eea6
--- /dev/null
+++ b/275/CH1/EX1.1.72/Ch1_1_72.sce
@@ -0,0 +1,15 @@
+clc

+disp("Example 1.72")

+printf("\n")

+disp("Find the maximum current flow through Zener diode")

+Vz=7.5    //zener voltage

+Pd1=400*10^-3 //maximum power dissipation at 50c

+T1=50

+T2=100

+D=3.2*10^-3

+//current at 50c

+Izm1=Pd1/Vz

+//current at 100

+Pd2=Pd1-((T2-T1)*D)

+Izm2=Pd2/Vz

+printf("maximum current flow through Zener diode at 50c & 100c=\n%f Ampere\n%f Ampere\n",Izm1,Izm2)

diff --git a/275/CH1/EX1.1.75/Ch1_1_75.sce b/275/CH1/EX1.1.75/Ch1_1_75.sce
new file mode 100755
index 000000000..81407610e
--- /dev/null
+++ b/275/CH1/EX1.1.75/Ch1_1_75.sce
@@ -0,0 +1,15 @@
+clc

+disp("Example 1.75")

+printf("\n")

+disp("Find the current through diode at 50c & 80c")

+T1=50

+T2=80

+D=3.2*10^-3

+Pd1=400*10^-3

+Vz=6.2

+//at 50c

+Izm1=Pd1/Vz

+//at 80c

+Pd2=Pd1-((T2-T1)*D)

+Izm2=Pd2/Vz

+printf("the current through diode at 50c & 80c=\n%f ampere\n%f ampere\n",Izm1,Izm2)

diff --git a/275/CH1/EX1.1.76/Ch1_1_76.sce b/275/CH1/EX1.1.76/Ch1_1_76.sce
new file mode 100755
index 000000000..363fe647d
--- /dev/null
+++ b/275/CH1/EX1.1.76/Ch1_1_76.sce
@@ -0,0 +1,11 @@
+clc

+disp("Example 1.76")

+printf("\n")

+disp("Find the diode current and power dissipation")

+Vdc=12

+Vz=4.3  //zener voltage

+R=820

+Iz=(Vdc-Vz)/R

+Pd=Vz*Iz

+printf("the diode current=\n%f ampere\n",Iz)

+printf("the power dissipation=\n%f watt\n",Pd)

diff --git a/275/CH1/EX1.1.8/Ch1_1_8.sce b/275/CH1/EX1.1.8/Ch1_1_8.sce
new file mode 100755
index 000000000..b5a17adb1
--- /dev/null
+++ b/275/CH1/EX1.1.8/Ch1_1_8.sce
@@ -0,0 +1,15 @@
+clc

+disp("Example 1.8")

+printf("\n")

+disp("find out resistance")

+printf("Given\n")

+disp("forward current=100mA,Vr=25V,cut in voltage=0.7v,reverse current=100nA")

+//all the values are from fig 1.8

+Vf=0.7

+If=100*10^-3 //forward current

+Vr=25        

+Ir=100*10^-9  //reverse current

+Rf=Vf/If      

+Rr=Vr/Ir

+printf("static forward resistance=\n%f ohm\n",Rf)

+printf("static reverse resistance=\n%f ohm\n",Rr)

diff --git a/275/CH1/EX1.1.9/Ch1_1_9.sce b/275/CH1/EX1.1.9/Ch1_1_9.sce
new file mode 100755
index 000000000..5407f1ca2
--- /dev/null
+++ b/275/CH1/EX1.1.9/Ch1_1_9.sce
@@ -0,0 +1,15 @@
+clc

+disp("Example 1.9")

+printf("\n")

+disp("find out resistance")

+printf("Given\n")

+disp("forward current=200mA,Vr=75V,cut in voltage=0.75v,reverse current=50nA")

+//all values are from fig 1.9

+Vf=0.75

+If=200*10^-3 //forward current

+Vr=75        

+Ir=50*10^-9  //reverse current

+Rf=Vf/If      

+Rr=Vr/Ir

+printf("static forward resistance=\n%f ohm\n",Rf)

+printf("static reverse resistance=\n%f ohm\n",Rr)