initial commit / add all books

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diff --git a/1583/CH8/EX8.1/PLL_Ex_8_1.sce b/1583/CH8/EX8.1/PLL_Ex_8_1.sce
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+clc

+//Chapter 8:Linear model of phase locked loop

+//example 8.1 page no 314

+//given

+fo=1*10^6//output frequency

+fr=25*10^3//reference frequency

+N=fo/fr

+Kd=2//phase detector gain factor

+Ko=100//VCO gain factor

+thetao=(2*100*2*%pi)//output phase

+s=poly(0,"s")

+thetar=s+(2*100*2*%pi)/N//input phase

+Tf=thetao/thetar

+disp(Tf,'the closed loop transfer function is ')

+Kv=Kd*Ko/N//bandwidth

+mprintf('the synthesizer bandwidth will be %d Hz',Kv)

diff --git a/1583/CH8/EX8.1/Result_of_Chapter_8_Ex8_1.jpg b/1583/CH8/EX8.1/Result_of_Chapter_8_Ex8_1.jpg
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index 000000000..73ce478e7
--- /dev/null
+++ b/1583/CH8/EX8.1/Result_of_Chapter_8_Ex8_1.jpg
diff --git a/1583/CH8/EX8.2/PLL_Ex_8_2.sce b/1583/CH8/EX8.2/PLL_Ex_8_2.sce
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index 000000000..1cc4b8c70
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+++ b/1583/CH8/EX8.2/PLL_Ex_8_2.sce
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+clc

+//Chapter 8:Linear model of phase locked loop

+//example 8.2 page no 316

+//given

+zeta=0.707//damping ratio for butterworth filter

+Kv=10*%pi//bandwidth

+wL=Kv*(2*zeta)^2//low pass filter bandwidth

+wn=sqrt(Kv*wL)//bandwidth of closed loop system 

+tr=2.2/wn//rise time

+mprintf('low pass filter bandwidth is %f rad/s \n bandwidth of closed loop system is %f rad/s \n the system rise time is %3.2e s',wL,wn,tr)

diff --git a/1583/CH8/EX8.2/Result_of_Chapter_8_Ex8_2.jpg b/1583/CH8/EX8.2/Result_of_Chapter_8_Ex8_2.jpg
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index 000000000..aa87761ea
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+++ b/1583/CH8/EX8.2/Result_of_Chapter_8_Ex8_2.jpg
diff --git a/1583/CH8/EX8.4/PLL_Ex_8_4.sce b/1583/CH8/EX8.4/PLL_Ex_8_4.sce
new file mode 100755
index 000000000..b598770b2
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+++ b/1583/CH8/EX8.4/PLL_Ex_8_4.sce
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+clc

+//Chapter 8:Linear model of phase locked loop

+//example 8.6 page no 349

+//given

+//The VCO is designed to oscillate at 100kHz

+R1=10.8*10^3

+R2=10.8*10^3

+C=1*10^-9

+N=2//order of filter

+fmin=(R2*(C+32*10^-12))^-1//minimum frequency

+fmax=fmin+(R1*(C+32*10^-12))^-1//maximum frequency

+VDD=9//regulated power supply

+Kvco=(2*%pi*(fmax-fmin))/(VDD-2)

+Kv=Kvco*(VDD/%pi)/N

+zeta=0.707//damping ratio for butterworth filter

+wL=Kv*(2*zeta)^2//low pass filter bandwidth

+wn=sqrt(Kv*wL)//bandwidth of closed loop system 

+mprintf('low pass filter bandwidth is %3.2e rad/s \n bandwidth of closed loop system is %3.2e rad/s',wL,wn)

+thetao=(10.6*10^9)//output phase

+s=poly(0,"s")

+thetar=s^2+s*2.3*10^4+2.66*10^8//input phase

+Tf=thetao/thetar

+disp(Tf,'the closed loop transfer function is ')

diff --git a/1583/CH8/EX8.4/Result_of_Chapter_8_Ex8_4.jpg b/1583/CH8/EX8.4/Result_of_Chapter_8_Ex8_4.jpg
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index 000000000..cb37eea1a
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+++ b/1583/CH8/EX8.4/Result_of_Chapter_8_Ex8_4.jpg