initial commit / add all books

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diff --git a/3636/CH6/EX6.3/Ex6_3.sce b/3636/CH6/EX6.3/Ex6_3.sce
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+clc;

+clear;

+sigma_p=1000 //conductivity of p-junction in ohm^-1*m^-1

+sigma_n=20 //conductivity of n-junction in ohm^-1*m^-1

+myu_p=0.05 //in m^2/V*s

+myu_n=0.13 //in m^2/V*s

+K=8.61*10^-5 //Boltzmann constant in eV/K

+T=300 //in K

+V=0.4 //forward bias voltage in V

+e=1.602*10^-19 //in J

+ni=1.5*10^16 //in m^-3

+tau_n=10^-6 //minority carrier lifetime in s

+tau_p=5*10^-6 //in s

+Const=0.026 //constant for kT/e in V

+hole_current=0.603*10^-6 //in A

+electron_current=0.016*10^-6 //in A

+

+//Calculation

+pp0=sigma_p/(e*myu_p) //majority carrier densities in m^-3

+nn0=sigma_n/(e*myu_n) //in m^-3

+np0=ni^2/pp0 //minority carrier densities in m^-3

+pn0=ni^2/nn0 //in m^-3

+Dn=myu_n*K*T //in m^2/s

+Dp=myu_p*K*T //in m^2/s

+Ln=sqrt(Dn*tau_n) //in m

+Lp=sqrt(Dp*tau_p) //in m

+Js=(((e*np0*Ln)/tau_n)+((e*pn0*Lp)/tau_p))

+Ratio=(hole_current)/(electron_current)

+J=Js*(exp(V/Const)-1)

+

+mprintf("1)\nReverse bias stauration current density= %0.3e A/m^2\n",Js) //The answers vary due to round off error

+mprintf("2)\nRatio of hole to electron current= %2.2f \n",Ratio)

+mprintf("3)\nTotal current density= %2.2f A/m^2",J) //The answers vary due to round off error

+