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13 files changed, 284 insertions, 0 deletions

diff --git a/2444/CH8/EX8.1/ex8_1.sce b/2444/CH8/EX8.1/ex8_1.sce
new file mode 100755
index 000000000..96c7c615d
--- /dev/null
+++ b/2444/CH8/EX8.1/ex8_1.sce
@@ -0,0 +1,12 @@
+// Exa 8.1

+clc;

+clear;

+close;

+format('v',8)

+// Given data

+Av1 = 60;// voltage gain of first stage

+Av2 = 100;// voltage gain of second stage 

+Av3 = 160;// voltage gain of third stage 

+Av= Av1*Av2*Av3;// overall voltage gain 

+Av_indB= 20*log10(Av);// overall voltage gain in dB

+disp(Av_indB,"The overall voltage gain of the amplifier in dB is : ")

diff --git a/2444/CH8/EX8.10/ex8_10.sce b/2444/CH8/EX8.10/ex8_10.sce
new file mode 100755
index 000000000..14a58db4d
--- /dev/null
+++ b/2444/CH8/EX8.10/ex8_10.sce
@@ -0,0 +1,37 @@
+// Exa 8.10

+clc;

+clear;

+close;

+format('v',5)

+// Given data

+V_CC = 12;// in V

+r_e = 25;// in mV

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

+R1 = 1.2;// in Mohm

+R1 = R1 * 10^6;// in ohm

+R3 = 1.2;// in Mohm

+R3 = R3 * 10^6;// in ohm

+R4 = 8;// in k ohm

+R4 = R4 * 10^3;// in ohm

+R5 = 24;// in k ohm

+R5 = R5 * 10^3;// in ohm

+Beta1 = 100;// unit less

+Beta2 = 100;// unit less

+I_B2 = V_CC/R3;// in A

+I_C2 = Beta2*I_B2;// in A

+I_E2 = I_C2;// in A

+r_e2 = r_e/I_E2;// in ohm

+Rac2 = (R4*R5)/(R4+R5);// in ohm

+Av2 = -(Rac2/r_e2);//voltage gain of second stage 

+disp(Av2,"The voltage gain of second stage is");

+Rac1 = (R3*(Beta2*r_e2))/(R3+(Beta2*r_e2));// in  ohm

+L = 1;// in H

+f = 4;// in kHz

+f = f * 10^3;// in Hz

+X_L = 2*%pi*f*L;// in ohm

+r_e1 = r_e2;// in ohm

+Av1 = round(-Rac1/r_e1 );// voltage gain of first stage

+disp(Av1,"The voltage gain of first stage at 4 kHz is");

+Av = Av1*Av2;// overall voltage gain

+Av = 20*log10(Av);// in dB

+disp(Av,"The overall voltage gain in dB is");

diff --git a/2444/CH8/EX8.11/ex8_11.sce b/2444/CH8/EX8.11/ex8_11.sce
new file mode 100755
index 000000000..6851768eb
--- /dev/null
+++ b/2444/CH8/EX8.11/ex8_11.sce
@@ -0,0 +1,45 @@
+// Exa 8.11

+clc;

+clear;

+close;

+format('v',6)

+// Given data

+V_CC = 25;// in V

+R1 = 180;// in k ohm

+R1 = R1*10^3;// in ohm

+R2 = 20;// in k ohm

+R2 = R2 * 10^3;// in ohm

+R_C2 = 20;// in k ohm

+R_C2 = R_C2 * 10^3;// in ohm

+R_C1 = R_C2;// in ohm

+R_E1 = 1.8;// in k ohm

+R_E1 = R_E1 * 10^3;// in ohm

+R_E2 = 4.3;// in k ohm

+R_E2 = R_E2 * 10^3;// in ohm

+R_L = 30;// in k ohm

+R_L = R_L * 10^3;// in ohm

+V_BE = 0.7;// in V

+Beta2 = 50;// unit less

+Beta1 = 50;// unit less

+V_Th1 = (V_CC/(R1+R2))*R2;// in V

+R_Th1 = (R1*R2)/(R1+R2);// in  ohm

+I_B = (V_Th1-V_BE)/( R_Th1+((Beta1+1)*R_E1) );// in A

+I_E1 = (Beta1+1)*I_B;// in A

+V_T = 25;// in mV

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

+r_e1 = V_T/I_E1;// in ohm

+I_C1 = I_E1;// in A

+V_C1 = V_CC-(I_C1*R_C1);// in V

+//V_E2 = V_B2-V_BE = V_C1-V_BE;// in V

+V_E2 = V_C1-V_BE;// in V

+I_E2 = V_E2/R_E2;// in A

+r_e2 = V_T/I_E2;// in ohm

+Rac2 = (R_C1*R_L)/(R_C1+R_L);// in  ohm

+Av2 = -Rac2/(r_e2+R_E2);// voltage gain of second stage 

+Rac1 = (R_C1*(Beta1*(r_e2+R_E2)))/(R_C1+(Beta1*(r_e2+R_E2)));// in ohm

+Av1 = -Rac1/(r_e1+R_E1);// voltage gain of first stage 

+Av = Av1*Av2;// voltage gain

+disp(Av,"The voltage gain is");

+r_in = R1*R2*Beta1*(r_e1+R_E1)/( (R1*R2)+(R2*(Beta1*(r_e1+R_E1)))+((Beta1*(r_e1+R_E1))*R1) );// in ohm

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

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

diff --git a/2444/CH8/EX8.12/ex8_12.sce b/2444/CH8/EX8.12/ex8_12.sce
new file mode 100755
index 000000000..bd18293bf
--- /dev/null
+++ b/2444/CH8/EX8.12/ex8_12.sce
@@ -0,0 +1,33 @@
+// Exa 8.12

+clc;

+clear;

+close;

+format('v',6)

+// Given data

+I_DSS = 15;// in mA

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

+V_P = -4;// in V

+g_mo = (-2*I_DSS)/V_P;// in S

+V_GSQ = -2;// in V

+g_m = g_mo*( 1-(V_GSQ/V_P) );// in S

+R_D = 2.7;// in k ohm

+R_D = R_D * 10^3;// in ohm

+Av1 = -g_m*R_D;// voltage gain of first stage

+Av2 = Av1;// voltage gain of second stage

+Av = Av1*Av2;// overall voltage gain

+disp(Av,"The overall voltage gain is");

+R_G = 2;// in Mohm

+Rin = R_G;// in Mohm

+disp(Rin,"The input impedance in Mohm is");

+Rout = R_D;// in ohm

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

+disp(Rout,"The output impedance in k ohm is");

+Rout= Rout*10^3;// in ohm

+Vin = 15;// in mV

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

+Vout = Av*Vin;// in V

+disp(Vout,"The output voltage in V is");

+R_L = 15;// in k ohm

+R_L = R_L * 10^3;// in ohm

+V_L = (R_L/(Rout+R_L))*Vout;// in V

+disp(V_L,"The output voltage across load resistance in V is");

diff --git a/2444/CH8/EX8.13/ex8_13.sce b/2444/CH8/EX8.13/ex8_13.sce
new file mode 100755
index 000000000..8e2bcbff3
--- /dev/null
+++ b/2444/CH8/EX8.13/ex8_13.sce
@@ -0,0 +1,14 @@
+// Exa 8.13

+clc;

+clear;

+close;

+format('v',7)

+// Given data

+f2 = 100;// in kHz

+f_H = f2/(sqrt(2^(1/3)-1 ));// in kHz

+disp(f_H,"The upper 3-dB frequency of each stage in kHz is");

+f1 = 25;// in kHz

+f_L = f1/(sqrt(2^(1/3)-1 ));// in kHz

+disp(f_L,"The lower 3-dB frequency of each stage in kHz is");

+

+// Note: The value of upper 3-dB frequency in the book is not accurate and the calculated value of f_L is wrong. because 25 will be divided by 0.51 not multiplied.

diff --git a/2444/CH8/EX8.14/ex8_14.sce b/2444/CH8/EX8.14/ex8_14.sce
new file mode 100755
index 000000000..a95a5b591
--- /dev/null
+++ b/2444/CH8/EX8.14/ex8_14.sce
@@ -0,0 +1,20 @@
+// Exa 8.14

+clc;

+clear;

+close;

+format('v',5)

+// Given data

+R_E= 1;// in k ohm

+h_ie= R_E;// in k ohm

+h_fe= 100;// unit less

+//V1= I1*[h_ie+(1+h_fe)*h_ie+(1+h_fe)^2*R_E]+I2*R_E       (i)

+//V2= I1*(1+h_fe)^2*R_E + I2*R_E                                             (ii)

+Z= [(h_ie+(1+h_fe)*h_ie+(1+h_fe)^2*R_E) R_E;(1+h_fe)^2*R_E R_E]

+Z11= Z(1);// k ohm

+Z21= Z(2);// k ohm

+Z12= Z(3);// k ohm

+Z22= Z(4);// k ohm

+disp(Z11*10^-3,"The value of Z11 in M ohm is : ")

+disp(Z12,"The value of Z12 in M ohm is : ")

+disp(Z21*10^-3,"The value of Z21 in M ohm is : ")

+disp(Z22,"The value of Z22 in M ohm is : ")

diff --git a/2444/CH8/EX8.2/ex8_2.sce b/2444/CH8/EX8.2/ex8_2.sce
new file mode 100755
index 000000000..6b35abc5e
--- /dev/null
+++ b/2444/CH8/EX8.2/ex8_2.sce
@@ -0,0 +1,10 @@
+// Exa 8.2

+clc;

+clear;

+close;

+format('v',6)

+// Given data

+Av = 80;// overall voltage gain in dB

+Av2 = 20*log10(150);// voltage gain of second stage in dB

+Av1= Av-Av2;//voltage gain of first stage in dB

+disp(Av1,"The voltage gain of first stage in dB is");

diff --git a/2444/CH8/EX8.3/ex8_3.sce b/2444/CH8/EX8.3/ex8_3.sce
new file mode 100755
index 000000000..d50ad34bd
--- /dev/null
+++ b/2444/CH8/EX8.3/ex8_3.sce
@@ -0,0 +1,14 @@
+// Exa 8.3

+clc;

+clear;

+close;

+format('v',5)

+// Given data

+Av1 = -60;// voltage gain of first stage 

+R_C = 500;// in ohm

+Rin = 1;// in k ohm

+Rin = Rin * 10^3;// in ohm

+h_fe = 50;// unit less

+Av2 = -h_fe*(R_C/Rin);// voltage gain of second stage 

+Av = Av1*Av2;// overall voltage gain stage 

+disp(Av,"The overall voltage gain is");

diff --git a/2444/CH8/EX8.4/ex8_4.sce b/2444/CH8/EX8.4/ex8_4.sce
new file mode 100755
index 000000000..660e11e82
--- /dev/null
+++ b/2444/CH8/EX8.4/ex8_4.sce
@@ -0,0 +1,29 @@
+// Exa 8.4

+clc;

+clear;

+close;

+format('v',6)

+// Given data

+R11 = 4;// in k ohm

+R21 = 20;// in k ohm

+h_ie = 1.1;// in k ohm

+R_C1=4;// in k ohm

+R22= 10;// in k ohm

+R12= 2;// in k ohm

+Zb = h_ie;// in k ohm

+Zin = (R11*R21*Zb)/( (R11*R21)+(R21*Zb)+(Zb*R11) );// in k ohm

+disp(Zin,"The input impedance in k ohm is");

+h_oe = 0;// unit less

+Q2 = %inf;// output impedance of transistor

+R_C2 = 2;// in k ohm

+// Zout= 1/h_oe || R_C2 = R_C2

+Zout = R_C2;// in k ohm

+disp(Zout,"The output impedance in k ohm is");

+h_fe = 50;// unit less

+R_L = 10;// in k ohm

+Av2= -h_fe/h_ie*(R_C2*R_L/(R_C2+R_L));// voltage gain of second stage

+Rac1= 1/(1/R_C1+1/R22+1/R12+1/h_ie);// in k ohm

+Av1= -h_fe/h_ie*Rac1;// voltage gain of first stage

+Av= Av1*Av2;// overall voltage gain 

+disp(Av,"The overall voltage gain is : ")

+

diff --git a/2444/CH8/EX8.5/ex8_5.sce b/2444/CH8/EX8.5/ex8_5.sce
new file mode 100755
index 000000000..873223717
--- /dev/null
+++ b/2444/CH8/EX8.5/ex8_5.sce
@@ -0,0 +1,28 @@
+// Exa 8.5

+clc;

+clear;

+close;

+format('v',6)

+// Given data

+R1 = 10;// in k ohm

+R2 = 5;// in k ohm

+Zb = 1;// in k ohm

+Zin = (R1*R2*Zb)/( (R1*R2)+(R2*Zb)+(Zb*R1) );// in k ohm

+disp(Zin,"The input impedance in k ohm is");

+R_C1 = 2;// in k ohm

+R_E1 = 2;// in k ohm

+R_C2 = 2;// in k ohm

+R_E2 = 2;// in k ohm

+h_oe = 0;// unit less

+Q2 = %inf;// output impedance of transistor

+//Zout= 1/h_oe || R_C2

+Zout = R_C2;// in k ohm

+disp(Zout,"The output impedance in k ohm is");

+h_fe = 100;// unit less

+h_ie = 1;// in k ohm

+R_ac=0.222;// in k ohm

+Av2= -h_fe/h_ie*R_C2;// voltage gain of second stage

+Rac1= 1/(1/R_C1+1/R1+1/R2+1/h_ie);// in k ohm

+Av1= -h_fe/h_ie*R_ac;// voltage gain of first stage

+Av= Av1*Av2;// overall voltage gain 

+disp(Av,"The overall voltage gain is : ")

diff --git a/2444/CH8/EX8.7/ex8_7.sce b/2444/CH8/EX8.7/ex8_7.sce
new file mode 100755
index 000000000..0f31c9bd4
--- /dev/null
+++ b/2444/CH8/EX8.7/ex8_7.sce
@@ -0,0 +1,12 @@
+// Exa 8.7

+clc;

+clear;

+close;

+format('v',5)

+// Given data

+Z_L = 16;// in ohm

+Z_desh_L = 10;// in k ohm

+Z_desh_L = Z_desh_L* 10^3;// in ohm

+// a = N1/N2 = sqrt( ZdasL/Z_L );

+a = sqrt( Z_desh_L/Z_L );// ratio of primary to secondary turns of step-down transformer

+disp(a,"The transformer turm ratio is");

diff --git a/2444/CH8/EX8.8/ex8_8.sce b/2444/CH8/EX8.8/ex8_8.sce
new file mode 100755
index 000000000..715637e65
--- /dev/null
+++ b/2444/CH8/EX8.8/ex8_8.sce
@@ -0,0 +1,13 @@
+// Exa 8.8

+clc;

+clear;

+close;

+format('v',5)

+// Given data

+Z_L = 10;// in ohm

+Z_desh_L = 1;// in k ohm

+Z_desh_L = Z_desh_L * 10^3;// in ohm

+Zs = Z_desh_L;// in ohm

+// a = N1/N2 = sqrt(Z_desh_L/Z_L);

+a = sqrt(Z_desh_L/Z_L);//turn ratio of the transformer 

+disp(a,"The turn ratio of the transformer is");

diff --git a/2444/CH8/EX8.9/ex8_9.sce b/2444/CH8/EX8.9/ex8_9.sce
new file mode 100755
index 000000000..531c81c3f
--- /dev/null
+++ b/2444/CH8/EX8.9/ex8_9.sce
@@ -0,0 +1,17 @@
+// Exa 8.9

+clc;

+clear;

+close;

+format('v',5)

+// Given data

+Z_L = 25;// in ohm

+Z_S = 10;// in k ohm

+Z_S = Z_S * 10^3;// in k ohm

+// Z_S = (a^2)*Z_L;

+a = sqrt(Z_S/Z_L);//turn ratio of the transformer 

+disp(a,"The transformer turn ratio is");

+//V2 = V1/a = Vs/a;

+Vs = 8;// in V

+V2 = Vs/a;// in V

+V_L =V2;// in V

+disp(V_L,"The load voltage in V is");