initial commit / add all books

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+// Example 6.9

+format('v',5)

+clc;

+clear;

+close;

+// given data

+bita= 150;

+R1= 10*10^3;// in Ω

+R2= 2.2*10^3;// in Ω

+R_E= 1*10^3;// in Ω

+V_CC= 10;// in V

+V_BE= 0.7;// in V

+Vt= 25*10^-3;// in V

+V_B= R2*V_CC/(R1+R2);// in V

+V_E= V_B-V_BE;// in V

+// The emitter current,

+I_E= V_E/R_E;// in A

+r_desh_e= Vt/I_E;// in Ω

+Zin_base= bita*r_desh_e;// in Ω

+// The input impedance of each stage 

+Zin= R1*R2*Zin_base/(R1*R2+R1*Zin_base+R2*Zin_base);// in Ω

+Zin= Zin*10^-3;// in k ohm

+disp(Zin,"The input impedance of each stage in kΩ is : ")

+