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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /2198/CH1 | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '2198/CH1')
55 files changed, 866 insertions, 0 deletions
diff --git a/2198/CH1/EX1.10.1/Ex1_10_1.sce b/2198/CH1/EX1.10.1/Ex1_10_1.sce new file mode 100755 index 000000000..43c1e60c1 --- /dev/null +++ b/2198/CH1/EX1.10.1/Ex1_10_1.sce @@ -0,0 +1,17 @@ +//Ex 1.10.1
+clc;clear;close;
+format('v',9);
+
+//Given :
+l=4*10^-2;//m
+A=10*10^-6;//m^2
+V=1;//Volt
+I=5*10^-3;//A
+q=1.6*10^-19;//Coulomb
+mu=1300;//cm^2/V-s
+J=I/A;//A/m^2
+E=V/l;//V/m
+n=J/(q*mu*10^-4*E);
+v=mu*10^-4*E;//m/s
+disp(n,"Concentration of electron(per m^3) : ");
+disp(v,"Electron velocity(m/s) : ");
diff --git a/2198/CH1/EX1.11.1/Ex1_11_1.sce b/2198/CH1/EX1.11.1/Ex1_11_1.sce new file mode 100755 index 000000000..27ff0af4e --- /dev/null +++ b/2198/CH1/EX1.11.1/Ex1_11_1.sce @@ -0,0 +1,13 @@ +//Ex 1.11.1
+clc;clear;close;
+format('v',9);
+
+//Given :
+ni=1.5*10^10/10^-6;//per m^3
+mu_n=1800*10^-4;//m^2/V-s
+mu_p=500*10^-4;//m^2/V-s
+q=1.6*10^-19;//Coulomb
+sigma_i=ni*(mu_n+mu_p)*q;//(ohm-m)^-1
+disp(sigma_i,"Conductivity in (ohm-m)^-1 : ");
+rho_i=1/sigma_i;//ohm-m
+disp(rho_i,"Resistivity in ohm-m : ");
diff --git a/2198/CH1/EX1.11.10/Ex1_11_10.sce b/2198/CH1/EX1.11.10/Ex1_11_10.sce new file mode 100755 index 000000000..6cc00a179 --- /dev/null +++ b/2198/CH1/EX1.11.10/Ex1_11_10.sce @@ -0,0 +1,12 @@ +//Ex 1.11.10
+clc;clear;close;
+format('v',9);
+
+//Given :
+ni=2.5*10^13;//per cm^3
+mu_p=1800;//cm^2/V-s
+mu_n=3800;//cm^2/V-s
+q=1.6*10^-19;//Coulomb
+sigma_i=ni*q*(mu_n+mu_p);//(ohm-cm)^-1
+rho_i=1/sigma_i;//ohm-cm
+disp(round(rho_i),"Resistivity of Ge(ohm-cm) : ");
diff --git a/2198/CH1/EX1.11.11/Ex1_11_11.sce b/2198/CH1/EX1.11.11/Ex1_11_11.sce new file mode 100755 index 000000000..7b6aa76f8 --- /dev/null +++ b/2198/CH1/EX1.11.11/Ex1_11_11.sce @@ -0,0 +1,14 @@ +//Ex 1.11.11
+clc;clear;close;
+format('v',9);
+
+//Given :
+ni=1.2*10^16;//per m^3
+p=10^22;//per m^3
+mu_p=500*10^-4;//cm^2/V-s
+mu_n=1350*10^-4;//cm^2/V-s
+q=1.6*10^-19;//Coulomb
+n=ni^2/p;//per m^3
+disp(n,"Electron concentration per m^3 : ");
+sigma=q*(n*mu_n+p*mu_p);//(ohm-m)^-1
+disp(sigma,"Conductivity of Si(ohm-m)^-1 : ");
diff --git a/2198/CH1/EX1.11.2/Ex1_11_2.sce b/2198/CH1/EX1.11.2/Ex1_11_2.sce new file mode 100755 index 000000000..94c688621 --- /dev/null +++ b/2198/CH1/EX1.11.2/Ex1_11_2.sce @@ -0,0 +1,11 @@ +//Ex 1.11.2
+clc;clear;close;
+format('v',9);
+
+//Given :
+T=300;//K
+Ao=2.735*10^31;//constant for Si
+k=86*10^-6;//boltzman constant
+EGO=1.1;//volt(Bandgap energy)
+ni=sqrt(Ao*T^3*exp(-EGO/k/T));//per cm^3
+disp(ni,"Intrinsic carrier concentration per cm^3 : ");
diff --git a/2198/CH1/EX1.11.3/Ex1_11_3.sce b/2198/CH1/EX1.11.3/Ex1_11_3.sce new file mode 100755 index 000000000..bf98455bb --- /dev/null +++ b/2198/CH1/EX1.11.3/Ex1_11_3.sce @@ -0,0 +1,19 @@ +//Ex 1.11.3
+clc;clear;close;
+format('v',9);
+
+//Given :
+A=1*10^-6;//m^2
+R=3.6*10^-4/10^-2;//ohm/m
+n=9*10^26;//electrons/m^3
+J=3*10^6;//A/m^2
+q=1.6*10^-19;//Coulomb
+I=J*A;//A
+disp(I,"(i) Current in A : ");
+rho=R*A;//ohm-m
+sigma=1/rho;//(ohm-m)^-1
+disp(sigma,"(ii) Conductivity in (ohm-m)^-1");
+v=J/n/q;//m/s
+disp(v,"(iii) velocity of free electrons in m/s : ");
+mu=sigma/n/q;//m^2/V-s
+disp(mu,"(iv) Mobility in m^2/V-s ; ");
diff --git a/2198/CH1/EX1.11.4/Ex1_11_4.sce b/2198/CH1/EX1.11.4/Ex1_11_4.sce new file mode 100755 index 000000000..06aee80cb --- /dev/null +++ b/2198/CH1/EX1.11.4/Ex1_11_4.sce @@ -0,0 +1,19 @@ +//Ex 1.11.4
+clc;clear;close;
+format('v',9);
+
+//Given :
+rho=3*10^5*10^-2;//ohm-m
+T1=30+273;//K
+mu_n=0.13;//m^2/V-s
+mu_p=0.05;//m^2/V-s
+q=1.6*10^-19;//Coulomb
+T2=100+273;//K
+sigma_i=1/rho;//(ohm-m)^-1
+ni1=sigma_i/q/(mu_n+mu_p);//electrons/m^3
+disp(ni1,"Intrinsic concentration at 30 degree C(per m^3) : ");
+k=8.62*10^-5;//eV/K(Boltzman constant)
+EGO=1.21;//V(Energy band gap)
+Ao=ni1^2/(T1^3*exp(-EGO/k/T1));//constant
+ni2=sqrt(Ao*T2^3*exp(-EGO/k/T2));//per cm^3
+disp(ni2,"Intrinsic concentration at 100 degree C(per m^3) : ");
diff --git a/2198/CH1/EX1.11.5/Ex1_11_5.sce b/2198/CH1/EX1.11.5/Ex1_11_5.sce new file mode 100755 index 000000000..d547687eb --- /dev/null +++ b/2198/CH1/EX1.11.5/Ex1_11_5.sce @@ -0,0 +1,16 @@ +//Ex 1.11.5
+clc;clear;close;
+format('v',9);
+
+//Given :
+l=0.1*10^-2;//m
+R=1.5*10^3;//ohm
+mu_n=0.14;//m^2/V-s
+mu_p=0.05;//m^2/V-s
+A=8*10^-8;//m^2
+ni=1.5*10^10*10^6;// per m^3
+q=1.6*10^-19;//Coulomb
+rho_n=R*A/l;//ohm-m
+sigma_n=1/rho_n;//(ohm-m)^-1
+ND=sigma_n/mu_n/q;//
+disp(ND,"Majority Carrier density(per m^3) : ");
diff --git a/2198/CH1/EX1.11.6/Ex1_11_6.sce b/2198/CH1/EX1.11.6/Ex1_11_6.sce new file mode 100755 index 000000000..4b8550f77 --- /dev/null +++ b/2198/CH1/EX1.11.6/Ex1_11_6.sce @@ -0,0 +1,18 @@ +//Ex 1.11.6
+clc;clear;close;
+format('v',9);
+
+//Given :
+A=2.5*10^-4;//m^2
+n=1.5*10^16;//per m^3
+q=1.6*10^-19;//Coulomb
+mu_n=0.14;//m^2/V-s
+mu_p=0.05;//m^2/V-s
+I=1.2*10^-3;//A
+V=9;//Volts
+ni=n;// per m^3
+sigma_i=ni*q*(mu_n+mu_p);//(ohm-m)^-1
+rho_i=1/sigma_i;//ohm-m
+R=V/I;//ohm
+l=R*A/rho_i;//m
+disp(l*1000,"Length of the bar(mm) : ");
diff --git a/2198/CH1/EX1.11.7/Ex1_11_7.sce b/2198/CH1/EX1.11.7/Ex1_11_7.sce new file mode 100755 index 000000000..a47e34e58 --- /dev/null +++ b/2198/CH1/EX1.11.7/Ex1_11_7.sce @@ -0,0 +1,19 @@ +//Ex 1.11.7
+clc;clear;close;
+format('v',8);
+
+//Given :
+n=5*10^22;//per cm^3
+mu_n=1300;//cm^2/V-s
+mu_p=500;//cm^2/V-s
+ni=1.5*10^10;//per cm^3
+T=300;//K
+rho_n=9.5;//ohm-cm
+q=1.6*10^-19;//Coulomb
+sigma_i=ni*q*(mu_n+mu_p);//(ohm-cm)^-1
+rho_i=1/sigma_i;//ohm-cm
+disp(rho_i,"Resistivity in ohm-cm : ");
+sigma_n=1/rho_n;//(ohm-cm)^-1
+ND=sigma_n/mu_n/q;//per m^3
+Ratio=ND/n;
+disp(Ratio,"Ratio of donor impurity atom to Si atom : ");
diff --git a/2198/CH1/EX1.11.8/Ex1_11_8.sce b/2198/CH1/EX1.11.8/Ex1_11_8.sce new file mode 100755 index 000000000..cbd6b58f7 --- /dev/null +++ b/2198/CH1/EX1.11.8/Ex1_11_8.sce @@ -0,0 +1,19 @@ +//Ex 1.11.8
+clc;clear;close;
+format('v',9);
+
+//Given :
+n=5*10^22;//per cm^3
+ni=1.52*10^10*10^6;//per m^3
+q=1.6*10^-19;//Coulomb
+mu_n=0.135;//m^2/V-s
+mu_p=0.048;//m^2/V-s
+impurity=1/10^8;//atoms
+sigma_i=ni*q*(mu_n+mu_p);//(ohm-cm)^-1
+rho_i=1/sigma_i;//ohm-cm
+disp(rho_i,"Resistivity of intrinsic Si in ohm-m : ");
+ND=n*impurity*10^6;//per m^3
+sigma_n=ND*mu_n*q;//(ohm-m)^-1
+rho_n=1/sigma_n;//ohm-m
+disp(rho_n,"Resistivity of doped Si in ohm-m : ");
+//Answer in the book is not accurate.
diff --git a/2198/CH1/EX1.11.9/Ex1_11_9.sce b/2198/CH1/EX1.11.9/Ex1_11_9.sce new file mode 100755 index 000000000..c26d9a5e6 --- /dev/null +++ b/2198/CH1/EX1.11.9/Ex1_11_9.sce @@ -0,0 +1,13 @@ +//Ex 1.11.9
+clc;clear;close;
+format('v',7);
+
+//Given :
+rho=9.6*10^-2;//ohm-m
+mu_n=1300*10^-4;//m^2/V-s
+sigma_n=1/rho;//(ohm-cm)^-1
+TotalAtoms=5*10^28;//per m^3
+q=1.6*10^-19;//Coulomb
+ND=sigma_n/mu_n/q;//per m^3
+ratio=ND/TotalAtoms;
+disp(ratio,"Ratio of doner atom to Si atom per unit volume : ");
diff --git a/2198/CH1/EX1.12.1/Ex1_12_1.sce b/2198/CH1/EX1.12.1/Ex1_12_1.sce new file mode 100755 index 000000000..8a01938e8 --- /dev/null +++ b/2198/CH1/EX1.12.1/Ex1_12_1.sce @@ -0,0 +1,12 @@ +//Ex 1.12.1
+clc;clear;close;
+format('v',9);
+
+//Given :
+T=27+273;//K
+ND=10^17;//per cm^3
+ni=1.5*10^10;//per cm^3
+n=ND;//per m^3//ND>>n
+disp(n,"Electron concentration per cm^3 : ");
+p=ni^2/n;//per m^3
+disp(p,"Holes per cm^3 : ");
diff --git a/2198/CH1/EX1.12.2/Ex1_12_2.sce b/2198/CH1/EX1.12.2/Ex1_12_2.sce new file mode 100755 index 000000000..81f8fb397 --- /dev/null +++ b/2198/CH1/EX1.12.2/Ex1_12_2.sce @@ -0,0 +1,12 @@ +//Ex 1.12.2
+clc;clear;close;
+format('v',9);
+
+//Given :
+Vol=4*50*1.5;//mm^3
+ni=2.4*10^19;//per m^3
+p=7.85*10^14;//per m^3
+n=ni^2/p;//per m^3
+Vol=Vol*10^-9;//m^3
+TotalElectron=n*Vol;//no. of electrons
+disp(TotalElectron,"Total free electrons per m^3 : ");
diff --git a/2198/CH1/EX1.13.1/Ex1_13_1.sce b/2198/CH1/EX1.13.1/Ex1_13_1.sce new file mode 100755 index 000000000..6f3d7cf5c --- /dev/null +++ b/2198/CH1/EX1.13.1/Ex1_13_1.sce @@ -0,0 +1,24 @@ +//Ex 1.13.1
+clc;clear;close;
+format('v',9);
+
+//Given :
+ND=10^14;//per cm^3
+NA=7*10^13;//per cm^3
+rho_i=60;//ohm-cm
+E=2;//V/cm
+q=1.6*10^-19;//Coulomb
+mu_p=1800;//cm^2/V-s
+mu_n=3800;//cm^2/V-s
+sigma_i=1/rho_i;//(ohm-cm)^-1
+ni=sigma_i/q/(mu_n+mu_p);//per cm^3
+//n=p+(ND-NA);//per cm^3
+//n*p=ni^2 implies (p+(ND-NA))*p=ni^2
+//p^2+(ND-NA)*p-ni^2=0
+m=[1 (ND-NA) -ni^2];//polynomial
+p=roots(m);//per m^3
+p=p(2);//taking only +ve value
+n=ni^2/p;//per m^3
+J=(n*mu_n+p*mu_p)*q*E/10^-4;//A/m^2
+disp(J,"Total current density(A/m^2) : ");
+//Answer in the textbook is not accurate.
diff --git a/2198/CH1/EX1.13.2/Ex1_13_2.sce b/2198/CH1/EX1.13.2/Ex1_13_2.sce new file mode 100755 index 000000000..51329eb64 --- /dev/null +++ b/2198/CH1/EX1.13.2/Ex1_13_2.sce @@ -0,0 +1,23 @@ +//Ex 1.13.2
+clc;clear;close;
+format('v',9);
+
+//Given :
+ND=10^14;//per cm^3
+NA=7*10^3;//per cm^3
+rho_i=60;//ohm-cm
+J=52;//mA/cm^2
+q=1.6*10^-19;//Coulomb
+mu_p=1800;//cm^2/V-s
+mu_n=3800;//cm^2/V-s
+sigma_i=1/rho_i;//(ohm-cm)^-1
+ni=sigma_i/q/(mu_n+mu_p);//per cm^3
+//n=p+(ND-NA);//per cm^3
+//n*p=ni^2 implies (p+(ND-NA))*p=ni^2
+//p^2+(ND-NA)*p-ni^2=0
+m=[1 (ND-NA) -ni^2];//polynomial
+p=roots(m);//per m^3
+p=p(2);//taking only +ve value
+n=ni^2/p;//per m^3
+E=J*10^-3/q/(n*mu_n+p*mu_p);//V/m
+disp(E,"Value of electrical field,E(V/cm) : ");
diff --git a/2198/CH1/EX1.13.3/Ex1_13_3.sce b/2198/CH1/EX1.13.3/Ex1_13_3.sce new file mode 100755 index 000000000..72ec4a0ef --- /dev/null +++ b/2198/CH1/EX1.13.3/Ex1_13_3.sce @@ -0,0 +1,23 @@ +//Ex 1.13.3
+clc;clear;close;
+format('v',9);
+
+//Given :
+ND=10^14;//per cm^3
+NA=7*10^13;//per cm^3
+rho_i=60;//ohm-cm
+E=2;//V/cm
+q=1.6*10^-19;//Coulomb
+mu_p=500;//cm^2/V-s
+mu_n=1300;//cm^2/V-s
+sigma_i=1/rho_i;//(ohm-cm)^-1
+ni=sigma_i/q/(mu_n+mu_p);//per cm^3
+//n=p+(ND-NA);//per cm^3
+//n*p=ni^2 implies (p+(ND-NA))*p=ni^2
+//p^2+(ND-NA)*p-ni^2=0
+m=[1 (ND-NA) -ni^2];//polynomial
+p=roots(m);//per m^3
+p=p(2);//taking only +ve value
+n=ni^2/p;//per m^3
+J=(n*mu_n+p*mu_p)*q*E/10^-4;//A/m^2
+disp(J,"Total current density(A/m^2) : ");
diff --git a/2198/CH1/EX1.13.4/Ex1_13_4.sce b/2198/CH1/EX1.13.4/Ex1_13_4.sce new file mode 100755 index 000000000..a5ff522e7 --- /dev/null +++ b/2198/CH1/EX1.13.4/Ex1_13_4.sce @@ -0,0 +1,11 @@ +//Ex 1.13.4
+clc;clear;close;
+format('v',9);
+
+//Given :
+l=6*10^-2;//m
+V=12;//volts
+v=73;//m/s
+E=V/l;//V/m
+mu=v/E;//m^2/V-s
+disp(mu,"Electron mobilitym^2/V-s) : ");
diff --git a/2198/CH1/EX1.15.1/Ex1_15_1.sce b/2198/CH1/EX1.15.1/Ex1_15_1.sce new file mode 100755 index 000000000..86eb7b415 --- /dev/null +++ b/2198/CH1/EX1.15.1/Ex1_15_1.sce @@ -0,0 +1,15 @@ +//Ex 1.15.1
+clc;clear;close;
+format('v',9);
+
+//Given :
+ND=10^13;//per cm^3
+Bz=0.2;//Wb/m^2
+d=5;//mm
+E=5;//V/cm
+q=1.6*10^-19;//Coulomb
+mu_n=1300;//cm^2/V-s
+rho=ND*q;//Coulomb/cm^3
+J=rho*mu_n*E;//A/cm^2
+VH=Bz*10^-4*J*d*10^-1/rho;//V
+disp(VH*10^3,"Magnitude of hall voltage(mV) : ");
diff --git a/2198/CH1/EX1.15.2/Ex1_15_2.sce b/2198/CH1/EX1.15.2/Ex1_15_2.sce new file mode 100755 index 000000000..0edf63199 --- /dev/null +++ b/2198/CH1/EX1.15.2/Ex1_15_2.sce @@ -0,0 +1,15 @@ +//Ex 1.15.2
+clc;clear;close;
+format('v',9);
+
+//Given :
+rho=220*10^3*10^-2;//ohm/m
+d=2.2*10^-3;//m
+w=2*10^-3;//m
+B=0.1;//Wb/m^2
+I=5*10^-6;//A
+VH=28*10^-3;//V
+sigma=1/rho;//(ohm-m)^-1
+RH=VH*w/(B*I);//ohm
+mu=sigma*RH;//m^2/V-s
+disp(mu,"Mobility(m^2/V-s) : ");
diff --git a/2198/CH1/EX1.16.1/Ex1_16_1.sce b/2198/CH1/EX1.16.1/Ex1_16_1.sce new file mode 100755 index 000000000..666b7c362 --- /dev/null +++ b/2198/CH1/EX1.16.1/Ex1_16_1.sce @@ -0,0 +1,17 @@ +//Ex 1.16.1
+clc;clear;close;
+format('v',9);
+
+//Given :
+l=4*10^-2;//m
+A=10*10^-6;//m^2
+V=1;//Volt
+I=5*10^-3;//A
+q=1.6*10^-19;//Coulomb
+mu=1300;//cm^2/V-s
+J=I/A;//A/m^2
+E=V/l;//V/m
+n=J/(q*mu*10^-4*E)
+v=mu*10^-4*E;//m/s
+disp(n,"Concentration of electron(per m^3) : ");
+disp(v,"Electron velocity(m/s) : ");
diff --git a/2198/CH1/EX1.16.2/Ex1_16_2.sce b/2198/CH1/EX1.16.2/Ex1_16_2.sce new file mode 100755 index 000000000..df2c52457 --- /dev/null +++ b/2198/CH1/EX1.16.2/Ex1_16_2.sce @@ -0,0 +1,13 @@ +//Ex 1.16.2
+clc;clear;close;
+format('v',9);
+
+//Given :
+mu_n=3800;//cm^2/V-s
+mu_p=1300;//cm^2/V-s
+ni=2.5*10^13;//per cm^3
+q=1.6*10^-19;//Coulomb
+ND=4.4*10^22/10^8;//per cm^3
+sigma_n=ND*q*mu_n;//(ohm-m)^-1
+rho_n=1/sigma_n;//ohm-cm
+disp(rho_n,"Resistivity of doped Ge(ohm-cm) : ");
diff --git a/2198/CH1/EX1.16.3/Ex1_16_3.sce b/2198/CH1/EX1.16.3/Ex1_16_3.sce new file mode 100755 index 000000000..c54176f0a --- /dev/null +++ b/2198/CH1/EX1.16.3/Ex1_16_3.sce @@ -0,0 +1,9 @@ +//Ex 1.16.3
+clc;clear;close;
+format('v',9);
+
+//Given :
+ni=1.5*10^16;//per m^3
+n=5*10^20;//per m^3
+p=ni^2/n;//per m^3
+disp(p,"Minor carrier density(per m^3) : ");
diff --git a/2198/CH1/EX1.16.4/Ex1_16_4.sce b/2198/CH1/EX1.16.4/Ex1_16_4.sce new file mode 100755 index 000000000..96d24ccba --- /dev/null +++ b/2198/CH1/EX1.16.4/Ex1_16_4.sce @@ -0,0 +1,28 @@ +//Ex 1.16.4
+clc;clear;close;
+format('v',9);
+
+//Given :
+ni=1.5*10^10;//per cm^3
+mu_n=1400;//cm^2/V-s
+mu_p=500;//cm^2/V-s
+l=1;//cm
+a=1;//mm^2
+q=1.6*10^-19;//Coulomb
+del_n=10^14;//per cm^3
+del_p=10^14;//per cm^3
+Nd=8*10^15;//per cm^3
+n=Nd;//per cm^3(Nd>>ni)
+disp(n,"Electron concentration, n(per cm^3) : ");
+p=ni^2/n;//per m^3
+disp(p,"Hole concentration, p(per cm^3) : ");
+nT=Nd+del_n;//per cm^3
+disp(nT,"Total electron concentration, nT(per cm^3) : ");
+pT=p+del_p;//per cm^3
+disp(pT,"Total hole concentration, pT(per cm^3) : ");
+sigma=(nT*mu_n+pT*mu_p)*q;//(ohm-cm)^-1
+rho=1/sigma;//ohm-cm
+R=rho*l/(a*10^-2);//ohm
+V=2;//volt
+I=V/R;//A
+disp(I*1000,"Current, I(mA) : ");
diff --git a/2198/CH1/EX1.16.5/Ex1_16_5.sce b/2198/CH1/EX1.16.5/Ex1_16_5.sce new file mode 100755 index 000000000..3e55e148a --- /dev/null +++ b/2198/CH1/EX1.16.5/Ex1_16_5.sce @@ -0,0 +1,19 @@ +//Ex 1.16.5
+clc;clear;close;
+format('v',9);
+
+//Given :
+A=2.3*10^-4;//m^2
+n=1.5*10^16;//per m^3
+l=1;//mm
+mu_n=1400;//cm^2/V-s
+mu_p=500;//cm^2/V-s
+p=n;//per m^3
+ni=n;//per m^3
+q=1.6*10^-19;//Coulomb
+sigma_i=ni*(mu_n*10^-4+mu_p*10^-4)*q;//(ohm-m)^-1
+rho_i=1/sigma_i;//ohm-m
+R=rho_i*l*10^-3/A;//ohm
+V=9;//volt
+I=V/R;//A
+disp(I*1000,"Current, I(mA) : ");
diff --git a/2198/CH1/EX1.16.6/Ex1_16_6.sce b/2198/CH1/EX1.16.6/Ex1_16_6.sce new file mode 100755 index 000000000..79dc66366 --- /dev/null +++ b/2198/CH1/EX1.16.6/Ex1_16_6.sce @@ -0,0 +1,15 @@ +//Ex 1.16.6
+clc;clear;close;
+format('v',9);
+
+//Given :
+ND=10^14;//per m^3
+Jn=10;//mA/cm^2
+E=3;//V/cm
+T=27+273;//K
+q=1.6*10^-19;//Coulomb
+mu_n=1500;//cm^2/V-s
+Dn=mu_n/39;//Diffusion constant
+n=ND;//per m^3
+dnBYdx=((Jn*10^-3/10^-4)-n*q*mu_n*E)/q/Dn;//concentration gradient
+disp(dnBYdx,"Concentration gradient, dn/dx : ");
diff --git a/2198/CH1/EX1.16.7/Ex1_16_7.sce b/2198/CH1/EX1.16.7/Ex1_16_7.sce new file mode 100755 index 000000000..8c28da157 --- /dev/null +++ b/2198/CH1/EX1.16.7/Ex1_16_7.sce @@ -0,0 +1,23 @@ +//Ex 1.16.7
+clc;clear;close;
+format('v',9);
+
+//Given :
+ND=10^13;//per m^3
+NA=10^14;//per m^3
+rho_i=44;//ohm-cm
+E=3;//V/cm
+q=1.6*10^-19;//Coulomb
+mu_n=0.38;//m^2/V-s
+mu_p=0.18;//m^2/V-s
+ni=2.5*10^19;//per m^3
+//n=p+(ND-NA);//per cm^3
+//n*p=ni^2 implies (p+(ND-NA))*p=ni^2
+//p^2+(ND-NA)*p-ni^2=0
+m=[1 (ND-NA) -ni^2];//polynomial
+p=roots(m);//per m^3
+p=p(1);//taking only +ve value
+n=ni^2/p;//per m^3
+J=(n*mu_n+p*mu_p)*q*(E/10^-2);//A/m^2
+disp(J,"Total current density(A/m^2) : ");
+//Ans in the textbook is not accurate.
diff --git a/2198/CH1/EX1.16.8/Ex1_16_8.sce b/2198/CH1/EX1.16.8/Ex1_16_8.sce new file mode 100755 index 000000000..14300bb70 --- /dev/null +++ b/2198/CH1/EX1.16.8/Ex1_16_8.sce @@ -0,0 +1,20 @@ +//Ex 1.16.8
+clc;clear;close;
+format('v',9);
+
+//Given :
+T=300;//K
+ni=2.5*10^13;//per cm^3
+mu_n=3800;//cm^2/V-s
+mu_p=1800;//cm^2/V-s
+q=1.6*10^-19;//Coulomb
+sigma_i=ni*(mu_n+mu_p)*q/10^-2;//(ohm-m)^-1
+disp(sigma_i,"Conductivity of intrinsic Ge in (ohm-m)^-1 : ");
+ND=4.4*10^22/10^7;//per cm^3
+n=ND;//per cm^3
+sigma_n=n*mu_n*q/10^-2;//(ohm-m)^-1
+disp(sigma_n,"Conductivity after adding donor impurity in (ohm-m)^-1 : ");
+NA=4.4*10^22/10^7;//per cm^3
+p=NA;//per cm^3
+sigma_p=p*mu_p*q/10^-2;//(ohm-m)^-1
+disp(sigma_p,"Conductivity after adding acceptor impurity in (ohm-m)^-1 : ");
diff --git a/2198/CH1/EX1.40.1/Ex1_40_1.sce b/2198/CH1/EX1.40.1/Ex1_40_1.sce new file mode 100755 index 000000000..aa85a9e7f --- /dev/null +++ b/2198/CH1/EX1.40.1/Ex1_40_1.sce @@ -0,0 +1,10 @@ +//Ex 1.40.1
+clc;clear;close;
+format('v',9);
+
+//Given :
+ND=10^17;//per cm^3
+ni=1.5*10^10;//per cm^3
+no=ND;//per cm^3///Nd>>ni
+po=ni^2/no;//per cm^3
+disp(po,"Equilibrium hole concentration (per cm^3) : ");
diff --git a/2198/CH1/EX1.40.10/Ex1_40_10.sce b/2198/CH1/EX1.40.10/Ex1_40_10.sce new file mode 100755 index 000000000..d6b95afd1 --- /dev/null +++ b/2198/CH1/EX1.40.10/Ex1_40_10.sce @@ -0,0 +1,12 @@ +//Ex 1.40.10
+clc;clear;close;
+format('v',9);
+
+//Given :
+rho=9.6*10^-2;//ohm-m
+mu_n=1300;//cm^2/V-s
+q=1.6*10^-19;//Coulomb
+sigma_n=1/rho;//(ohm-m)^-1
+ND=sigma_n/q/(mu_n*10^-4);//per m^3
+ni=5*10^22*10^6;//per m^3
+disp(ND/ni,"Ratio of donor atom to Si atom : ");
diff --git a/2198/CH1/EX1.40.11/Ex1_40_11.sce b/2198/CH1/EX1.40.11/Ex1_40_11.sce new file mode 100755 index 000000000..b698d23ce --- /dev/null +++ b/2198/CH1/EX1.40.11/Ex1_40_11.sce @@ -0,0 +1,10 @@ +//Ex 1.40.11
+clc;clear;close;
+format('v',9);
+
+//Given :
+ni=1.5*10^10;//per cm^3
+n_n=2.25*10^15;//per cm^3
+disp(n_n,"Equillibrium electron density(per cm^3) : ");
+p_n=ni^2/n_n;//per cm^3
+disp(p_n,"Equillibrium hole density(per cm^3) : ");
diff --git a/2198/CH1/EX1.40.12/Ex1_40_12.sce b/2198/CH1/EX1.40.12/Ex1_40_12.sce new file mode 100755 index 000000000..62527923c --- /dev/null +++ b/2198/CH1/EX1.40.12/Ex1_40_12.sce @@ -0,0 +1,9 @@ +//Ex 1.40.12
+clc;clear;close;
+format('v',9);
+
+//Given :
+NA=2*10^16;//per cm^3
+ND=10^16;//per cm^3
+p=NA-ND;//per cm^3
+disp(p,"Material is p-type & Carrier concentration(holes per cm^3) : ");
diff --git a/2198/CH1/EX1.40.13/Ex1_40_13.sce b/2198/CH1/EX1.40.13/Ex1_40_13.sce new file mode 100755 index 000000000..b2e7a8652 --- /dev/null +++ b/2198/CH1/EX1.40.13/Ex1_40_13.sce @@ -0,0 +1,9 @@ +//Ex 1.40.13
+clc;clear;close;
+format('v',9);
+
+//Given :
+del_n=10^15;//per cm^3
+tau_p=10*10^-6;//sec
+rate=del_n/tau_p;//rate of generation minority carrier
+disp(rate,"Rate of generation of minority carrier(electron hole pair/sec/cm^3) : ");
diff --git a/2198/CH1/EX1.40.14/Ex1_40_14.sce b/2198/CH1/EX1.40.14/Ex1_40_14.sce new file mode 100755 index 000000000..841a6bcf3 --- /dev/null +++ b/2198/CH1/EX1.40.14/Ex1_40_14.sce @@ -0,0 +1,9 @@ +//Ex 1.40.14
+clc;clear;close;
+format('v',9);
+
+//Given :
+E=10;//V/cm
+v=1/(20*10^-6);//m/s
+mu=v/E;//cm^2/V-s
+disp(mu,"Mobility(cm^2/V-s) : ");
diff --git a/2198/CH1/EX1.40.15/Ex1_40_15.sce b/2198/CH1/EX1.40.15/Ex1_40_15.sce new file mode 100755 index 000000000..bcf1cb27a --- /dev/null +++ b/2198/CH1/EX1.40.15/Ex1_40_15.sce @@ -0,0 +1,30 @@ +//Ex 1.40.15
+clc;clear;close;
+format('v',9);
+
+//Given :
+ND=4.5*10^15;//per cm^3
+A=1*10^-2;//cm^2
+l=10;//cm
+tau_p=1*10^-6;//sec
+tau_n=1*10^-6;//sec
+Dp=12;//cm^2/sec
+Dn=30;//cm^2/sec
+q=1.6*10^-19;//Coulomb
+del_p=10^21;//electron hole pair/cm^3/sec
+x=34.6*10^-4;//cm
+Kdash=26;//mV(Kdash is taken as K*T/q)
+ni=1.5*10^10;//per cm^3
+no=ND;//per cm^3//ND<<ni
+po=ni^2/no;//per cm^3
+ln=sqrt(Dn*tau_n);//cm
+lp=sqrt(Dp*tau_p);//cm
+dpBYdx=del_p*exp(-x/lp);//per cm^4
+dnBYdx=del_p*exp(-x/ln);//per cm^4
+Jp=-q*Dp*dpBYdx;//A/cm^2
+Ip=Jp*A;//A
+disp(Ip,"Hole diffusion current (A) : ");
+Jn=q*Dn*dnBYdx;//A/cm^2
+In=Jn*A;//A
+disp(In,"Electron diffusion current (A) : ");
+//Solution is not complete in the book and value of Jp & Jn is due to wrong calculation for dpBYdx and dnBYdx.
diff --git a/2198/CH1/EX1.40.16/Ex1_40_16.sce b/2198/CH1/EX1.40.16/Ex1_40_16.sce new file mode 100755 index 000000000..9bda625d8 --- /dev/null +++ b/2198/CH1/EX1.40.16/Ex1_40_16.sce @@ -0,0 +1,11 @@ +//Ex 1.40.16
+clc;clear;close;
+format('v',9);
+
+//Given :
+h=6.626*10^-34;//J-s
+lambda=5490;//Angstrum
+c=3*10^8;//m/s(speed of light)
+f=c/(lambda*10^-10);//Hz
+E=(h/1.6/10^-19)*f;//eV
+disp(E,"Energy band gap(eV) : ");
diff --git a/2198/CH1/EX1.40.17/Ex1_40_17.sce b/2198/CH1/EX1.40.17/Ex1_40_17.sce new file mode 100755 index 000000000..096537950 --- /dev/null +++ b/2198/CH1/EX1.40.17/Ex1_40_17.sce @@ -0,0 +1,16 @@ +//Ex 1.40.17
+clc;clear;close;
+format('v',9);
+
+//Given :
+q=1.6*10^-19;//Coulomb
+Dn=35;//cm^2/s
+x=[0 2];//micro meter
+n=[10^17 6*10^16];//per cm^3
+plot(x,n);
+title('n Vs x');
+xlabel('x(micro meter)');
+ylabel('n(electrons per cm^3)');
+dnBYdx=(n(2)-n(1))/(x(2)-x(1))/10^-4;//gradient
+Jn=q*Dn*dnBYdx;//A/cm^2
+disp(Jn,"Current density(A/cm^2) : ");
diff --git a/2198/CH1/EX1.40.18/Ex1_40_18.sce b/2198/CH1/EX1.40.18/Ex1_40_18.sce new file mode 100755 index 000000000..122743189 --- /dev/null +++ b/2198/CH1/EX1.40.18/Ex1_40_18.sce @@ -0,0 +1,14 @@ +//Ex 1.40.18
+clc;clear;close;
+format('v',9);
+
+//Given :
+q=1.6*10^-19;//Coulomb
+l=0.1;//cm
+A=100*10^-8;//cm^2
+n_n=5*10^20*10^-6;//per cm^3
+mu_n=0.13*10^4;//cm^2/V-s
+sigma_n=q*n_n*mu_n;//(ohm-cm)^-1
+rho=1/sigma_n;//ohm-cm
+R=rho*l/A;//ohm
+disp(round(R/10^6),"Resistance of the bar(Mohm) : ");
diff --git a/2198/CH1/EX1.40.19/Ex1_40_19.sce b/2198/CH1/EX1.40.19/Ex1_40_19.sce new file mode 100755 index 000000000..d50a09089 --- /dev/null +++ b/2198/CH1/EX1.40.19/Ex1_40_19.sce @@ -0,0 +1,10 @@ +//Ex 1.40.19
+clc;clear;close;
+format('v',9);
+
+//Given :
+NA=9*10^16;//per cm^3
+ND=1*10^16;//per cm^3
+w_total=3;//micro meter
+w_p=w_total*ND/NA;//micro meter
+disp(w_p,"Answer is (B). Depletion width on p-side(micro meter) : ");
diff --git a/2198/CH1/EX1.40.20/Ex1_40_20.sce b/2198/CH1/EX1.40.20/Ex1_40_20.sce new file mode 100755 index 000000000..7ccf12b61 --- /dev/null +++ b/2198/CH1/EX1.40.20/Ex1_40_20.sce @@ -0,0 +1,9 @@ +//Ex 1.40.20
+clc;clear;close;
+format('v',9);
+
+//Given :
+ni=1.5*10^16;//per m^3
+n_n=5*10^20;//per m^3
+p_n=ni^2/n_n;//per m^3
+disp(p_n,"Majority carrier density(per m^3) : ");
diff --git a/2198/CH1/EX1.40.21/Ex1_40_21.sce b/2198/CH1/EX1.40.21/Ex1_40_21.sce new file mode 100755 index 000000000..77561481f --- /dev/null +++ b/2198/CH1/EX1.40.21/Ex1_40_21.sce @@ -0,0 +1,16 @@ +//Ex 1.40.21
+clc;clear;close;
+format('v',9);
+
+//Given :
+q=1.6*10^-19;//Coulomb
+Dn=25;//cm^2/s
+x=[0 0.5];//micro meter(base width)
+n=[10^14 0];//per cm^3
+plot(x,n);
+title('n Vs x');
+xlabel('x(micro meter)');
+ylabel('n(electrons per cm^3)');
+dnBYdx=(n(2)-n(1))/(x(1)-x(2))/10^-4;//gradient
+Jn=q*Dn*dnBYdx;//A/cm^2
+disp(Jn,"Current density(A/cm^2) : ");
diff --git a/2198/CH1/EX1.40.22/Ex1_40_22.sce b/2198/CH1/EX1.40.22/Ex1_40_22.sce new file mode 100755 index 000000000..407da10e0 --- /dev/null +++ b/2198/CH1/EX1.40.22/Ex1_40_22.sce @@ -0,0 +1,10 @@ +//Ex 1.40.22
+clc;clear;close;
+format('v',9);
+
+//Given :
+h=6.64*10^-34;//planks constant
+c=3*10^8;//m/s(speed of light)
+lambda=0.87*10^-6;//m
+Eg=h*c/lambda/(1.6*10^-19);//eV
+disp(Eg,"Band gap(eV) : ");
diff --git a/2198/CH1/EX1.40.23/Ex1_40_23.sce b/2198/CH1/EX1.40.23/Ex1_40_23.sce new file mode 100755 index 000000000..67ca25afc --- /dev/null +++ b/2198/CH1/EX1.40.23/Ex1_40_23.sce @@ -0,0 +1,19 @@ +//Ex 1.40.23
+clc;clear;close;
+format('v',9);
+
+//Given :
+t=0.46*10^-4;//cm
+E=2;//eV
+alfa=5*10^4;//cm^-1
+Io=10;//mW
+q=1.6*10^-19;//Coulomb
+It=Io*exp(-alfa*t);//mW
+Pabs=Io-It;//mW
+disp(round(Pabs),"(a) Absorbed power(mW) : ");
+Eg=1.43;//eV(Band gap)
+heat_fraction=(E-Eg)/E;
+E_heat=heat_fraction*Pabs*10^-3;//J/s(energy converted to heat)
+disp(E_heat,"(b) Rate of excess thermal energy(J/s) : ");
+photons=Pabs*10^-3/q/E;//no. of photons per sec
+disp(photons,"(c) No. of photons per sec : ");
diff --git a/2198/CH1/EX1.40.24/Ex1_40_24.sce b/2198/CH1/EX1.40.24/Ex1_40_24.sce new file mode 100755 index 000000000..be0fb403c --- /dev/null +++ b/2198/CH1/EX1.40.24/Ex1_40_24.sce @@ -0,0 +1,28 @@ +//Ex 1.40.24
+clc;clear;close;
+format('v',9);
+
+//Given :
+Kdash=0.0259;//constant(taken as K*T/q)
+A=0.5;//cm^2
+Na=10^17;//per cm^3
+ni=1.5*10^10;//per cm^3
+delta_p=5*10^16;//per cm^3
+x=1000;//Angstrum
+mu_p=500;//cm^2/V-s
+tau_p=10^-10;//sec
+q=1.6*10^-19;//Coulomb
+
+Dp=Kdash*mu_p;//cm/s
+Lp=sqrt(Dp*tau_p);//cm
+p0=Na;//per cm^3
+p=p0+delta_p*exp(x*10^-8/Lp);//per cm^3
+delE1=log(p/ni)*Kdash;//eV(taken as Ei-Fp)
+Eg=1.12;//eV(Band gap)
+delE2=Eg-delE1;//eV(taken as Ec-Fp)
+disp(delE2,"Steady state separation between Fp & Ec in eV : ");
+Ip=q*A*Dp/Lp*delta_p*exp(x*10^-8/Lp);//A
+disp(Ip,"Hole current in A : ");
+Qp=q*A*delta_p*Lp;//C
+disp(Qp,"Excess stored hole charge(Coulomb)");
+//Answer in the book is wrong beacause of calculation mistake in the value of p & Ip.
diff --git a/2198/CH1/EX1.40.25/Ex1_40_25.sce b/2198/CH1/EX1.40.25/Ex1_40_25.sce new file mode 100755 index 000000000..21123862b --- /dev/null +++ b/2198/CH1/EX1.40.25/Ex1_40_25.sce @@ -0,0 +1,28 @@ +//Ex 1.40.25
+clc;clear;close;
+format('v',9);
+
+//Given :
+Kdash=0.0259;//constant(taken as K*T/q)
+A=0.5;//cm^2
+Na=10^17;//per cm^3
+ni=1.5*10^10;//per cm^3
+delta_p=5*10^16;//per cm^3
+x=1000;//Angstrum
+mu_p=500;//cm^2/V-s
+tau_p=10^-10;//sec
+q=1.6*10^-19;//Coulomb
+
+Dp=Kdash*mu_p;//cm/s
+Lp=sqrt(Dp*tau_p);//cm
+p0=Na;//per cm^3
+p=p0+delta_p*exp(x*10^-8/Lp);//per cm^3
+delE1=log(p/ni)*Kdash;//eV(taken as Ei-Fp)
+Eg=1.12;//eV(Band gap)
+delE2=Eg-delE1;//eV(taken as Ec-Fp)
+disp(delE2,"Steady state separation between Fp & Ec in eV : ");
+Ip=q*A*Dp/Lp*delta_p*exp(x*10^-8/Lp);//A
+disp(Ip,"Hole current in A : ");
+Qp=q*A*delta_p*Lp;//C
+disp(Qp,"Excess stored hole charge(Coulomb)");
+//Answer in the book is wrong beacause of calculation mistake in the value of p & Ip.
diff --git a/2198/CH1/EX1.40.3/Ex1_40_3.sce b/2198/CH1/EX1.40.3/Ex1_40_3.sce new file mode 100755 index 000000000..df292828c --- /dev/null +++ b/2198/CH1/EX1.40.3/Ex1_40_3.sce @@ -0,0 +1,12 @@ +//Ex 1.40.3
+clc;clear;close;
+format('v',9);
+
+//Given :
+ni=1.5*10^10;//per cm^3
+ND=10^17;//per cm^3
+no=ND;//per cm^3///Nd>>ni
+po=ni^2/no;//per cm^3
+KT=0.0259;//constant
+delEf=KT*log(no/ni);//eV
+disp("Fermi level, Ef = Ei+"+string(delEf)+" eV");
diff --git a/2198/CH1/EX1.40.4/Ex1_40_4.sce b/2198/CH1/EX1.40.4/Ex1_40_4.sce new file mode 100755 index 000000000..6ba1100d5 --- /dev/null +++ b/2198/CH1/EX1.40.4/Ex1_40_4.sce @@ -0,0 +1,14 @@ +//Ex 1.40.4
+clc;clear;close;
+format('v',9);
+
+//Given :
+K=1.38*10^-23;//J/K
+T=27+273;//K
+e=1.6*10^-19;//constant
+mu_n=0.17;//m^2/V-s
+mu_p=0.025;//m^2/V-s
+Dn=K*T/e*mu_n;//m^2/s
+disp(Dn,"Diffusion coffiecients of electron(m^2/s) : ");
+Dp=K*T/e*mu_p;//m^2/s
+disp(Dp,"Diffusion coffiecients of holes(m^2/s) : ");
diff --git a/2198/CH1/EX1.40.5/Ex1_40_5.sce b/2198/CH1/EX1.40.5/Ex1_40_5.sce new file mode 100755 index 000000000..3e8f5b84f --- /dev/null +++ b/2198/CH1/EX1.40.5/Ex1_40_5.sce @@ -0,0 +1,15 @@ +//Ex 1.40.5
+clc;clear;close;
+format('v',9);
+
+//Given :
+K=1.38*10^-23;//J/K
+T=27+273;//K
+e=1.6*10^-19;//constant
+del_no=10^20;//per.m^3
+tau_n=10^-7;//s
+mu_n=0.15;//m^2/V-s
+Dn=K*T/e*mu_n;//m^2/s
+Ln=sqrt(Dn*tau_n);//m
+Jn=e*Dn*del_no/Ln;//A/m^2
+disp(Jn,"Diffusion current density(A/m^2) : ");
diff --git a/2198/CH1/EX1.40.6/Ex1_40_6.sce b/2198/CH1/EX1.40.6/Ex1_40_6.sce new file mode 100755 index 000000000..fa90f9542 --- /dev/null +++ b/2198/CH1/EX1.40.6/Ex1_40_6.sce @@ -0,0 +1,13 @@ +//Ex 1.40.6
+clc;clear;close;
+format('v',9);
+
+//Given :
+sigma_n=0.1;//(ohm-cm)^-1
+mu_n=1300;//m^2/V-s
+ni=1.5*10^10;//per cm^3
+q=1.6*10^-19;//Coulomb
+n_n=sigma_n/q/mu_n;//per cm^3
+p_n=ni^2/n_n;//per cm^3
+p_n=p_n*10^6;//per m^3
+disp(p_n,"Concentration of holes(per m^3) : ");
diff --git a/2198/CH1/EX1.40.7/Ex1_40_7.sce b/2198/CH1/EX1.40.7/Ex1_40_7.sce new file mode 100755 index 000000000..a5c1a908b --- /dev/null +++ b/2198/CH1/EX1.40.7/Ex1_40_7.sce @@ -0,0 +1,15 @@ +//Ex 1.40.7
+clc;clear;close;
+format('v',9);
+
+//Given :
+L=100*10^-6;//m
+A=10^-7*10^-6;//m^2
+mu_e=0.13;//m^2/V-s
+mu_h=0.05;//m^2/V-s
+tau_h=10^-6;//sec
+V=12;//volt
+E=V/L;//v/m
+tn=L^2/(mu_e*V);//sec
+Gain=tau_h/tn*(1+mu_h/mu_e);//
+disp(Gain,"Photoconductor gain : ");
diff --git a/2198/CH1/EX1.40.8/Ex1_40_8.sce b/2198/CH1/EX1.40.8/Ex1_40_8.sce new file mode 100755 index 000000000..bbd00bb67 --- /dev/null +++ b/2198/CH1/EX1.40.8/Ex1_40_8.sce @@ -0,0 +1,20 @@ +//Ex 1.40.8
+clc;clear;close;
+format('v',7);
+
+//Given :
+T=300;//K
+rho_i=45;//ohm-cm
+//part (i)
+mu_n=3800;//cm^2/V-s
+mu_p=1800;//cm^2/V-s
+ni=2.5*10^13;//per cm^3
+q=1.6*10^-19;//Coulomb
+sigma=ni*q*(mu_n+mu_p);//(ohm-cm)^-1
+rho=1/sigma;//ohm-cm
+disp(round(rho),"Resistivity of intrinsic Ge at 300K(ohm-cm) : ");
+//part (ii)
+ND=4.4*10^22/10^8;//per cm^3
+sigma=ND*q*mu_n;//(ohm-cm)^-1
+rho=1/sigma;//ohm-cm
+disp(rho,"Resistivity of doped Ge(ohm-cm) : ");
diff --git a/2198/CH1/EX1.40.9/Ex1_40_9.sce b/2198/CH1/EX1.40.9/Ex1_40_9.sce new file mode 100755 index 000000000..f822ad95b --- /dev/null +++ b/2198/CH1/EX1.40.9/Ex1_40_9.sce @@ -0,0 +1,11 @@ +//Ex 1.40.9
+clc;clear;close;
+format('v',9);
+
+//Given :
+ni=10^16;//per m^3
+ND=10^22;//per m^3
+n=ND;//per m^3//ND>>ni
+disp(n,"Electron concentration(per m^3) : ");
+p=ni^2/n;//per m^3
+disp(p,"Electron concentration(per m^3) : ");
diff --git a/2198/CH1/EX1.5.1/Ex1_5_1.sce b/2198/CH1/EX1.5.1/Ex1_5_1.sce new file mode 100755 index 000000000..bb3a3e04d --- /dev/null +++ b/2198/CH1/EX1.5.1/Ex1_5_1.sce @@ -0,0 +1,19 @@ +//Ex 1.5.1
+clc;clear;close;
+format('v',6);
+
+//Given :
+t1=35;//degreeC
+t2=60;//degreeC
+T1=t1+273;//K
+T2=t2+273;//K
+disp("Forbidden gap for Si : ");
+EG1_Si=1.21-3.6*10^-4*T1;//eV
+disp(EG1_Si,"at 35 degree C in eV")
+EG2_Si=1.21-3.6*10^-4*T2;//eV
+disp(EG2_Si,"at 60 degree C in eV")
+disp("Forbidden gap for Ge : ");
+EG1_Ge=0.785-2.23*10^-4*T1;//eV
+disp(EG1_Ge,"at 35 degree C in eV")
+EG2_Ge=0.785-2.23*10^-4*T2;//eV
+disp(EG2_Ge,"at 60 degree C in eV")
diff --git a/2198/CH1/EX1.9.1/Ex1_9_1.sce b/2198/CH1/EX1.9.1/Ex1_9_1.sce new file mode 100755 index 000000000..2fa0b2ccc --- /dev/null +++ b/2198/CH1/EX1.9.1/Ex1_9_1.sce @@ -0,0 +1,17 @@ +//Ex 1.9.1
+clc;clear;close;
+format('v',9);
+
+//Given :
+l=6*10^-2;//m
+V=1;//Volt
+A=10*10^-6;//m^2
+I=10*10^-3;//A
+q=1.602*10^-19;//Coulomb
+mu_n=1300*10^-4;//m^2/V-s
+E=V/l;//V/m
+v=mu_n*E;//m/s
+J=I/A;//A/m^2
+n=J/(q*mu_n*E);//per m^3
+disp(n,"(i) Concentration of electron(m^3) : ");
+disp(v,"(ii) Drift velocity(m/s) : ");
diff --git a/2198/CH1/EX1.9.2/Ex1_9_2.sce b/2198/CH1/EX1.9.2/Ex1_9_2.sce new file mode 100755 index 000000000..38cecbb4d --- /dev/null +++ b/2198/CH1/EX1.9.2/Ex1_9_2.sce @@ -0,0 +1,11 @@ +//Ex 1.9.2
+clc;clear;close;
+format('v',9);
+
+//Given :
+l=6*10^-2;//m
+V=12;//Volt
+v=73;//m/s
+E=V/l;//V/m
+mu=v/E;//m^2/V-s
+disp(mu,"Electron mobility(m^2/V-s) : ");
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