initial commit / add all books

6 files changed, 166 insertions, 0 deletions

diff --git a/2375/CH5/EX5.1/ex5_1.sce b/2375/CH5/EX5.1/ex5_1.sce
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+// Exa 5.1

+clc;

+clear;

+close;

+format('v',6)

+// Given data

+I_C = 2;// in mA

+I_C =I_C * 10^-3;// in A

+V_CEQ = 20;// in V

+h_fe = 100;

+I_BQ = 20;// in µA

+I_BQ = I_BQ * 10^-6;// in A

+Beta = 100;

+f_T = 50;// in MHz

+f_T = f_T * 10^6;// in Hz

+Cob = 3;// in pF

+Cob = Cob * 10^-12;// in F

+h_ie = 1400;// in ohm

+T = 300;// in K

+// (i) Transconductance

+g_m = 11600*(I_C/T);// in S

+g_m=g_m*10^6;// in µS

+disp(g_m,"The transconductance in µS is");

+// (ii) Input resistance

+g_m=g_m*10^-6;// in S

+r_be = h_fe/g_m; //in ohm 

+disp(r_be,"The input resistance in ohm is");

+// (iii) Capacitance

+Cbc = Cob ;// in F

+Cbe = g_m/(2*%pi*f_T)-Cbc;// in F 

+Cbe= round(Cbe*10^12);// in pF

+disp(Cbe,"The capacitance in pF is");

+// (iv) Base Spreading Resistance

+r_bb = round(h_ie - r_be);// in ohm

+disp(r_bb,"The base spreading resistance in ohm is");

diff --git a/2375/CH5/EX5.2/ex5_2.sce b/2375/CH5/EX5.2/ex5_2.sce
new file mode 100755
index 000000000..33c116f90
--- /dev/null
+++ b/2375/CH5/EX5.2/ex5_2.sce
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+// Exa 5.2

+clc;

+clear;

+close;

+format('v',6)

+// Given data

+I_C = 10;// in mA

+I_C =I_C * 10^-3;// in A

+V_CE = 10;// in V

+V_T= 26*10^-3;// in V

+h_ie = 500;// in ohm

+h_oe = 4*10^-5;// in S

+h_fe  = 100;

+g_be = 1/260;

+h_re = 10^-4;

+f_T = 50;// in MHz

+f_T = f_T * 10^6;// in Hz

+T = 300;// in K

+Cob =3;// in pF

+Cob = Cob * 10^-12;// in F

+// (i) Transconductance

+g_m = I_C/V_T;// in A/V

+g_m= round(g_m*10^3);// in mA/V

+disp(g_m,"The Transconductance in mA/V is");

+// (ii) Input resistance

+g_m= g_m*10^-3;// in A/V

+r_be = round(h_fe/g_m);// in ohm

+disp(r_be,"The input resistance in ohm is");

+// (iii) Base spreading resistance 

+r_bb = h_ie - r_be;// in ohm

+disp(r_bb,"The base spreading resistance in ohm is");

+// (iv) The feedback conductance 

+format('e',8)

+g_bc = h_re*g_be;

+disp(g_bc,"The feedback conductance is");

+// (v) The output conductance 

+g_ce = h_oe - (1+h_fe)*g_bc

+disp(g_ce,"The output conductance is : ")

+// (vi) Capacitance

+format('v',6)

+Cbe= g_m/(2*%pi*f_T);// in F

+Cbe= Cbe*10^12;// in pF

+disp(Cbe,"The value of C_b''e in pF is : ")

+Cc= Cob;// in F

+Cc= Cc*10^12

+disp(Cc,"The value of Cc in pF is : ")

diff --git a/2375/CH5/EX5.3/ex5_3.sce b/2375/CH5/EX5.3/ex5_3.sce
new file mode 100755
index 000000000..038c021f8
--- /dev/null
+++ b/2375/CH5/EX5.3/ex5_3.sce
@@ -0,0 +1,25 @@
+// Exa 5.3

+clc;

+clear;

+close;

+format('v',5)

+// Given data

+W = 10^-6;// in m

+I_E =2;// in mA

+I_E = I_E * 10^-3;// in A

+V_T = 26;// in mV

+V_T = V_T * 10^-3;// in V

+D_B = 47*10^-4;

+//g_m = abs(I_C)/V_T = abs(I_E)/V_T;

+// The emitter diffusion capacitance, Cbe = g_m*((W^2)/(2*D_B));

+Cbe = I_E/V_T*W^2/(2*D_B);// F

+Cbe= Cbe*10^12;// in pF

+disp(Cbe,"The emitter diffusion capacitance in pF is");

+Cbe= Cbe*10^-12;// in F

+g_m = abs(I_E)/V_T;

+// The transition frequency 

+f_T = g_m/(2*%pi*Cbe);// in Hz

+f_T = f_T * 10^-6;// in MHz

+disp(f_T,"The transition frequency in MHz is");

+

+// Note: The answer in the book is not accurate.

diff --git a/2375/CH5/EX5.4/ex5_4.sce b/2375/CH5/EX5.4/ex5_4.sce
new file mode 100755
index 000000000..148dea91b
--- /dev/null
+++ b/2375/CH5/EX5.4/ex5_4.sce
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+// Exa 5.4

+clc;

+clear;

+close;

+// Given data

+I_CQ = 5;// in mA

+I_CQ = I_CQ * 10^-3;// in A

+V_VEQ = 10;// in V

+h_ie = 600;// in ohm

+h_fe = 100;

+C_C = 3;// in pF

+C_C = C_C * 10^-12;// in F

+Ai = 10;// Ai(f)

+f = 10;// in MHz

+// Ai = h_fe/( sqrt( 1 + ((f/f_Beta)^2) ) );

+f_Beta = f/(sqrt( ((h_fe/Ai)^2) - 1 ));// in MHz

+disp(f_Beta,"The Beta cut off frequency in MHz is");

+f_T = h_fe*f_Beta;// in MHz

+disp(f_T,"The gain bandwidth product in MHz is");

+g_m = 0.1923;

+Ce = g_m/(2*%pi*f_T*10^6);// in F

+disp(Ce,"The value of Ce in F is");

+Cbe= Ce;// in F

+disp(Cbe*10^12,"The value of C_b''e in pF is : ")

+r_be = h_fe/g_m;// in ohm

+disp(r_be,"The value of r_b''e in ohm is");

+r_bb = h_ie - r_be;// in ohm

+disp(r_bb,"The value of r_bb'' in ohm is");

diff --git a/2375/CH5/EX5.5/ex5_5.sce b/2375/CH5/EX5.5/ex5_5.sce
new file mode 100755
index 000000000..d109aebe0
--- /dev/null
+++ b/2375/CH5/EX5.5/ex5_5.sce
@@ -0,0 +1,12 @@
+// Exa 5.5

+clc;

+clear;

+close;

+// Given data

+f_T = 400;// in MHz

+D_Beta = 13;// in cm^2/sec

+//Ce = (g_m*(W^2))/(2*D_B), so

+//f_T = (g_m/(2*%pi))*( (2*D_B)/(g_m*(W^2)) ) = D_B/(%pi*(W^2));

+W = sqrt( D_Beta/(%pi*f_T*10^6) );// in cm

+W = W * 10^4;// in µm

+disp(W,"The base width of silicon transistor in µm is");

diff --git a/2375/CH5/EX5.6/ex5_6.sce b/2375/CH5/EX5.6/ex5_6.sce
new file mode 100755
index 000000000..0ba2a84ee
--- /dev/null
+++ b/2375/CH5/EX5.6/ex5_6.sce
@@ -0,0 +1,20 @@
+// Exa 5.6

+clc;

+clear;

+close;

+format('v',5)

+// Given data

+D_B = 47;// in cm^2/sec

+I_C = 2;// in mA

+I_C = I_C * 10^-3;// in A

+V_CEQ = 15;// in V

+W = 1;// in µm

+W = W * 10^-4;// in cm

+V_T = 0.026;// in V

+g_m =I_C/(abs(V_T));// in ohm

+Ce = (g_m*(W^2))/(2*D_B);// in F

+Ce = Ce * 10^12;// in pF

+disp(Ce,"The value of Ce in pF is");

+f_T = g_m/(2*%pi*Ce*10^-12);// in Hz

+f_T = f_T * 10^-6;// in MHz

+disp(f_T,"The value of f_T in MHz is");