Xcos examples from textbooks and for blocksHEADmaster

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diff --git a/Working_Examples/293/CH9/EX9.2/eg9_2.sce b/Working_Examples/293/CH9/EX9.2/eg9_2.sce
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+// Quiescent point

+Idq = 0.0034; // drain current

+Vdq = 15; // drain voltage

+Vgq = 1; // gate voltage

+

+Vdd = 24; //drain supply voltage 

+

+Rs = Vgq/Idq;

+disp(Rs,"The value of self bais source resistance is(in ohm): ")

+

+Rd = (Vdd - Vdq)/Idq ; 

+disp(Rd,"The value of drain load resistance is(in ohm): ")
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diff --git a/Working_Examples/293/CH9/EX9.3/eg9_3.sce b/Working_Examples/293/CH9/EX9.3/eg9_3.sce
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+//a

+//transistor parameters 

+ R2 = 0.625;

+ hie = 1.67;

+ Rb = 4.16;

+ Rl = 2.4;

+ Roe = 150;

+ 

+ Cc = 25 * 10^-6;

+ rBB = 0.29;

+ rBE = 1.375;

+ Cd = 6900 * 10^-12;

+ Ct = 40 * 10^-12;

+ gm = 0.032;

+ 

+  Req = (Rl*Roe)/(Rl + Roe);

+  hfe = 44;

+  a = 1 + (R2/Req);

+  b = 1 + (hie/Rb);

+  Aim = -hfe/(a*b); // mid band frequency gain 

+  disp("a")

+  disp(Aim,"The mid band frequency gain of the first stage of the circuit is: ")

+  

+  //b

+  Tl = 2*%pi*(Req + R2)*Cc*(10^3);

+  Fl = 1/Tl; 

+  

+  Rp = (Req*R2)/(Req + R2);

+  C = Cd + Ct*(1 + gm*Rp*10^3);

+  d = Rb + hie ;

+  e = rBE * (Rb + rBB)* 10^3 * C ; 

+  Fh = d/(2*%pi*e);

+  

+  BW = Fh - Fl;

+ disp("b")

+ disp(BW, "The bandwidth of the first stage amplifier in Hz is :")

+  

+  
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