initial commit / add all books

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diff --git a/1583/CH9/EX9.1/PLLA_Ex_9_1.sce b/1583/CH9/EX9.1/PLLA_Ex_9_1.sce
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+++ b/1583/CH9/EX9.1/PLLA_Ex_9_1.sce
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+clc

+//chapter 9: Stability Analysis

+//Example 9.1 page no 357

+//given

+Kv=50//DC gain

+wL=100//corner frequency

+disp('The system crossover frequecny is approximately 50 rad/s')

+PhaseMargin=90-(atan(50/wL)*180/%pi)//phase margin of system

+disp('At this frequency the phase shift of the open loop transfer function is -112.5')

+disp(PhaseMargin,'The phase margin is ')

diff --git a/1583/CH9/EX9.1/Result_of_Chapter_9_Ex9_1.jpg b/1583/CH9/EX9.1/Result_of_Chapter_9_Ex9_1.jpg
new file mode 100755
index 000000000..5058d9255
--- /dev/null
+++ b/1583/CH9/EX9.1/Result_of_Chapter_9_Ex9_1.jpg
diff --git a/1583/CH9/EX9.2/PLLA_Ex_9_2.sce b/1583/CH9/EX9.2/PLLA_Ex_9_2.sce
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index 000000000..194b35628
--- /dev/null
+++ b/1583/CH9/EX9.2/PLLA_Ex_9_2.sce
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+clc

+//chapter 9: Stability Analysis

+//Example 9.2 page no 357

+//given

+Kv=50//DC gain

+wL=10//corner frequency

+disp('The system crossover frequecny is approximately 22 rad/s')

+PhaseMargin=90-(atan(22/wL)*180/%pi)//phase margin of system

+disp(PhaseMargin,'The phase margin is ')

+

diff --git a/1583/CH9/EX9.2/Result_of_Chapter_9_Ex9_2.jpg b/1583/CH9/EX9.2/Result_of_Chapter_9_Ex9_2.jpg
new file mode 100755
index 000000000..8ead2e107
--- /dev/null
+++ b/1583/CH9/EX9.2/Result_of_Chapter_9_Ex9_2.jpg
diff --git a/1583/CH9/EX9.3/PLLA_Ex_9_3.sce b/1583/CH9/EX9.3/PLLA_Ex_9_3.sce
new file mode 100755
index 000000000..d72e55ccd
--- /dev/null
+++ b/1583/CH9/EX9.3/PLLA_Ex_9_3.sce
@@ -0,0 +1,12 @@
+clc

+close

+//chapter 9: Stability Analysis

+//Example 9.3 page no 361

+//given

+clear

+wL=258

+s=poly(0,'s')

+h=syslin('c',(100/(s*(s/wL+1)^2 )))

+clf();bode(h,1,1000);

+disp('The open loop gain and the phase plots are given .It is seen that the crossover frequency is 15Hz,and the phase margin is 50degree')

+disp('We know that the overshoot can be increased by decreasing the phase margin.In fact,in this case selecting wL=233 rad/s corresponding to phase margin of 43.5degree gives an overshoot of 20persent')

diff --git a/1583/CH9/EX9.3/Result_of_Chapter_9_Ex9_3.jpeg b/1583/CH9/EX9.3/Result_of_Chapter_9_Ex9_3.jpeg
new file mode 100755
index 000000000..ec8940fa9
--- /dev/null
+++ b/1583/CH9/EX9.3/Result_of_Chapter_9_Ex9_3.jpeg
diff --git a/1583/CH9/EX9.4/PLLA_Ex_9_4.sce b/1583/CH9/EX9.4/PLLA_Ex_9_4.sce
new file mode 100755
index 000000000..684c9291a
--- /dev/null
+++ b/1583/CH9/EX9.4/PLLA_Ex_9_4.sce
@@ -0,0 +1,14 @@
+clc

+close

+//chapter 9: Stability Analysis

+//Example 9.4 page no 363

+//given

+clear

+N=2

+Kv=0.83*10^3//DC gain

+B=1250//closed loop bandwidth

+wn=1.27*10^3

+wL=wn^2/Kv//corner frequency

+s=poly(0,'s')

+h=syslin('c',(1/((s^2/wn^2)+0.9*s/wn+1)))

+clf();bode(h,1,1000);

diff --git a/1583/CH9/EX9.4/Result_of_Chapter_9_Ex9_4.jpeg b/1583/CH9/EX9.4/Result_of_Chapter_9_Ex9_4.jpeg
new file mode 100755
index 000000000..34dfaafd6
--- /dev/null
+++ b/1583/CH9/EX9.4/Result_of_Chapter_9_Ex9_4.jpeg
diff --git a/1583/CH9/EX9.5/PLLA_Ex_9_5.sce b/1583/CH9/EX9.5/PLLA_Ex_9_5.sce
new file mode 100755
index 000000000..e91a63eb9
--- /dev/null
+++ b/1583/CH9/EX9.5/PLLA_Ex_9_5.sce
@@ -0,0 +1,11 @@
+clc

+close

+//chapter 9: Stability Analysis

+//Example 9.5 page no 368

+//given

+clear

+Ka=(2.2e3)^2

+wz=(2*%pi)/(2.2/sqrt((2.2e3)^2))

+s=poly(0,'s')

+h=syslin('c',(1000*(s/(wz+1))/(s^2/Ka +(s/wz) +1)))

+clf();bode(h,1,1000);

diff --git a/1583/CH9/EX9.5/Result_of_Chapter_9_Ex9_5.jpeg b/1583/CH9/EX9.5/Result_of_Chapter_9_Ex9_5.jpeg
new file mode 100755
index 000000000..70452dec6
--- /dev/null
+++ b/1583/CH9/EX9.5/Result_of_Chapter_9_Ex9_5.jpeg
diff --git a/1583/CH9/EX9.6/PLLA_Ex_9_6.sce b/1583/CH9/EX9.6/PLLA_Ex_9_6.sce
new file mode 100755
index 000000000..2267dc764
--- /dev/null
+++ b/1583/CH9/EX9.6/PLLA_Ex_9_6.sce
@@ -0,0 +1,17 @@
+clc

+//Chapter 9:Stability Analysis

+//example 8.6 page no 373

+//given

+zeta=0.8//damping ratio

+B=10^3//closed loop bandwidth

+X=sqrt(1+2*zeta^2+sqrt(2+4*zeta^2+4*zeta^4))

+Ka=(B/X)^2//loop gain

+wn=sqrt(Ka)//

+wz=wn/(2*zeta)//the system zero

+mprintf('the closed loop gain is %3.2e (rad/s)^2 \n wn = %f rad/s \n the system has zero at %d rad/s',Ka,wn,wz)

+

+

+

+

+

+

diff --git a/1583/CH9/EX9.6/Result_of_Chapter_9_Ex9_6.jpg b/1583/CH9/EX9.6/Result_of_Chapter_9_Ex9_6.jpg
new file mode 100755
index 000000000..ade7de5b7
--- /dev/null
+++ b/1583/CH9/EX9.6/Result_of_Chapter_9_Ex9_6.jpg
diff --git a/1583/CH9/EX9.7/PLLA_Ex_9_7.sce b/1583/CH9/EX9.7/PLLA_Ex_9_7.sce
new file mode 100755
index 000000000..6fc84ffd1
--- /dev/null
+++ b/1583/CH9/EX9.7/PLLA_Ex_9_7.sce
@@ -0,0 +1,13 @@
+clc

+//Chapter 9:Phase locked loop Analysis 

+//Example 9.7 page no 376

+a=28//taking alpha as a

+Ka=0.21*10^6

+GF=20*log10(a)^1/2

+disp(GF,'The value of gain is ')

+disp('so we must determine where the uncompensated frequency response is -14.5dB ')

+Wc=a^(1/4)*Ka^(1/2)

+disp('The 28:1 lead ratio will increase the crossover frequency by a factor 2.3  The factor zero is placed at ')

+Wz=Wc/sqrt(a)//systems zero

+Wp=a*Wz//systems pole

+mprintf('The crossover frequency is %3.2e rad/s \n The zero is placed at %d rad/s \n The pole is placed at %d rad/s ',Wc,Wz,Wp)

diff --git a/1583/CH9/EX9.7/Result_of_Chapter_9_Ex9_7.jpg b/1583/CH9/EX9.7/Result_of_Chapter_9_Ex9_7.jpg
new file mode 100755
index 000000000..c05bf0cb2
--- /dev/null
+++ b/1583/CH9/EX9.7/Result_of_Chapter_9_Ex9_7.jpg
diff --git a/1583/CH9/EX9.9/PLLA_Ex_9_9.sce b/1583/CH9/EX9.9/PLLA_Ex_9_9.sce
new file mode 100755
index 000000000..f79605271
--- /dev/null
+++ b/1583/CH9/EX9.9/PLLA_Ex_9_9.sce
@@ -0,0 +1,8 @@
+clc

+//Chapter 9:Phase locked loop Analysis 

+//Example 9.9 page no 380

+disp('since the phase margin without time delay is 50 degree, a 10 degree phase lag can be introduced by the time delay at the crossover frequecy.That is ,')

+Wc=1000//crossover frequency

+thetaT=-0.174

+T=thetaT/Wc//time delay

+mprintf('The time delay is %3.2e ',T)

diff --git a/1583/CH9/EX9.9/Result_of_Chapter_9_Ex9_9.jpg b/1583/CH9/EX9.9/Result_of_Chapter_9_Ex9_9.jpg
new file mode 100755
index 000000000..bcda6eac2
--- /dev/null
+++ b/1583/CH9/EX9.9/Result_of_Chapter_9_Ex9_9.jpg