initial commit / add all books

30 files changed, 738 insertions, 0 deletions

diff --git a/69/CH7/EX7.1/7_1.sce b/69/CH7/EX7.1/7_1.sce
new file mode 100755
index 000000000..fad565fe3
--- /dev/null
+++ b/69/CH7/EX7.1/7_1.sce
@@ -0,0 +1,22 @@
+clear; clc; close;

+

+Vgg = 2;

+Idss = 10*10^(-3);

+Vp = -4;

+Vdd = 16;

+Rd = 2*10^(3);

+

+Vgs = -Vgg;

+Id = Idss*(1-(Vgs/Vp))^2;

+Vds = Vdd - Id*Rd;

+Vd = Vds;

+Vg = Vgs;

+Vs = 0;

+

+disp(Vgs,'Vgsq(Volts) = ');

+disp(Id,'Idq(Amperes) = ');

+disp(Vds,'Vds(Volts) = ');

+disp(Vd,'Vd(Volts) = ');

+disp(Vg,'Vg(Volts) = ');

+disp(Vs,'Vs(Volts) = ');

+

diff --git a/69/CH7/EX7.10/7_10.sce b/69/CH7/EX7.10/7_10.sce
new file mode 100755
index 000000000..602c18d69
--- /dev/null
+++ b/69/CH7/EX7.10/7_10.sce
@@ -0,0 +1,16 @@
+clear; clc; close;

+

+Idss = 10*10^(-3);

+Vp = -4;

+Vdd = 20;

+Rd = 1.5*10^(3);

+

+Vgsq = 0;

+disp(Vgsq,'Q-point value of Vgs(found after interpolation) is :');

+

+Idq = 10*10^(-3);

+

+Vd = Vdd - Idq*(Rd);

+

+disp(Idq,'Idq(Amperes) = ');

+disp(Vd,'Vds(Volts) = ');

diff --git a/69/CH7/EX7.11/7_11.jpg b/69/CH7/EX7.11/7_11.jpg
new file mode 100755
index 000000000..4d7f273e1
--- /dev/null
+++ b/69/CH7/EX7.11/7_11.jpg
diff --git a/69/CH7/EX7.11/7_11.sce b/69/CH7/EX7.11/7_11.sce
new file mode 100755
index 000000000..57f3ff558
--- /dev/null
+++ b/69/CH7/EX7.11/7_11.sce
@@ -0,0 +1,43 @@
+clear; clc; close;

+

+Id_on = 6*10^(-3);

+Vgs_on = 8;

+Vgs_th = 3;

+Rd = 2*10^(3);

+Vdd = 12;

+

+k = Id_on/(Vgs_on-Vgs_th);

+

+Vgs1 = Vgs_th;

+Id1 = 0;

+Vgs2 = 6;

+Id2 = 0.24*10^(-3)*(6-3)^2;

+Vgs3 = Vgs_on;

+Id3 = Id_on;

+Vgs4 = 10;

+Id4 = 0.24*10^(-3)*(10-3)^2;

+

+x = [0 1 2 Vgs1 Vgs2 Vgs3 Vgs4];

+y = [0 0 0 Id1 Id2 Id3 Id4];

+

+yi=smooth([x;y],0.1);

+a = gca();

+a.thickness = 2;

+a.y_location = 'left';

+a.x_label.text = 'Vgs';

+a.y_label.text = 'Id(mA)';

+a.title.text = 'Transfer curve for MOSFET';

+a.grid = [1 1];

+plot2d(yi(1,:)',yi(2,:)',[3]);

+

+Vgs = Vdd; //at Id = 0

+Id = Vdd/Rd;    //at Vgs = 0

+x = 0:1:12;

+y = (-0.5*10^(-3))*x + 6*10^(-3);

+plot2d(x,y);

+Idq = 2.75*10^(-3);

+Vgsq = 6.4;

+Vdsq = Vgsq;

+disp(Idq,'Idq(Amperes) = ');

+disp(Vdsq,'Vdsq(Volts) = ');

+

diff --git a/69/CH7/EX7.12/7_12.jpg b/69/CH7/EX7.12/7_12.jpg
new file mode 100755
index 000000000..cd4eb51dc
--- /dev/null
+++ b/69/CH7/EX7.12/7_12.jpg
diff --git a/69/CH7/EX7.12/7_12.sce b/69/CH7/EX7.12/7_12.sce
new file mode 100755
index 000000000..763417a45
--- /dev/null
+++ b/69/CH7/EX7.12/7_12.sce
@@ -0,0 +1,37 @@
+clear; clc; close;

+

+Id_on = 3*10^(-3);

+Vgs_on = 10;

+Vgs_th = 5;

+Vdd = 40;

+R1 = 22*10^(6);

+R2 = 18*10^(6);

+Rs = 1*10^(3);

+Rd = 3*10^(3);

+

+Vg = (R2*Vdd)/(R1+R2)

+Vgs = 0:1:18;

+Id = (Vg-Vgs)/Rs;

+plot2d(Vgs,Id);

+a = gca();

+a.thickness = 2;

+a.y_location = 'left';

+a.x_label.text = 'Vgs';

+a.y_label.text = 'Id(mA)';

+a.title.text = 'Q-point for network';

+a.grid = [1 1];

+

+k = Id_on/(Vgs_on-Vgs_th)^2;

+Vgs = 5:1:18;

+Id = k*(Vgs-Vgs_th)^2;

+yi=smooth([Vgs;Id],0.1);

+plot2d(yi(1,:)',yi(2,:)',[3]);

+

+Idq = 5.2*10^(-3);

+Vgsq = 12.5;

+Vds = Vdd-Idq*(Rs+Rd);

+

+disp(Idq,'Idq(Amperes) = ');

+disp(Vgsq,'Vgsq(Volts) = ')

+disp(Vds,'Vds(Volts) = ');

+

diff --git a/69/CH7/EX7.13/7_13.sce b/69/CH7/EX7.13/7_13.sce
new file mode 100755
index 000000000..7724c59b1
--- /dev/null
+++ b/69/CH7/EX7.13/7_13.sce
@@ -0,0 +1,21 @@
+clear; clc; close;

+

+Idss = 12*10^(-3);

+Vp = -3;

+Vbe = 0.7;

+Beta = 180;

+Re = 1.6*10^(3);

+

+Vb = (24*10^(3)*16)/((82+24)*10^(3));

+Ve = Vb-Vbe;

+Vre = Ve;

+Ie = Vre/Re;

+Ic = Ie;

+Id = Ic;

+Vd = 16-Id*(2.7*10^(3));

+Vgsq = -1.8;

+Vc = Vb - Vgsq;

+

+disp(Vd,'Vd(Volts) = ');

+disp(Vc,'Vc(Volts) = ');

+

diff --git a/69/CH7/EX7.14/7_14.sce b/69/CH7/EX7.14/7_14.sce
new file mode 100755
index 000000000..3be1d270f
--- /dev/null
+++ b/69/CH7/EX7.14/7_14.sce
@@ -0,0 +1,18 @@
+clear; clc; close;

+

+Idss = 12*10^(-3);

+Vp = -3;

+Vbe = 0.7;

+Beta = 80;

+Re = 1.6*10^(3);

+Rs = 2.4*10^(3);

+

+Vgsq = -2.6;

+Idq = 1*10^(-3);

+Ic = Idq;

+Ie = Ic;

+Ib = Ic/Beta;

+Vb = 16-Ib*(470*10^(3));

+Vd = Vb-Vbe;

+disp(Vd,'Vd(Volts) = ');

+

diff --git a/69/CH7/EX7.15/7_15.sce b/69/CH7/EX7.15/7_15.sce
new file mode 100755
index 000000000..3adc95146
--- /dev/null
+++ b/69/CH7/EX7.15/7_15.sce
@@ -0,0 +1,13 @@
+clear; clc; close;

+

+Vdd = 20;

+Vdq = 12;

+Idq = 2.5*10^(-3);

+Vgsq = -1;

+Rd = (Vdd-Vdq)/Idq;

+Rs = -Vgsq/Idq;

+

+disp(Rd,'Rd(Ohms) = ');

+disp(Rs,'Rs(Ohms) = ');

+disp(3.3*10^(3),'Closest commercial value of Rd(Ohms) = ');

+disp(0.39*10^(3),'Closest commercial value of Rs(Ohms) = ');

diff --git a/69/CH7/EX7.16/7_16.sce b/69/CH7/EX7.16/7_16.sce
new file mode 100755
index 000000000..9be1c729f
--- /dev/null
+++ b/69/CH7/EX7.16/7_16.sce
@@ -0,0 +1,14 @@
+clear; clc; close;

+

+Vd =12;

+Vdd = 16;

+Vgsq = -2;

+Rd = 1.8*10^(3);

+

+Vg = (47*10^(3)*16)/((47+91)*10^(3));

+Id = (Vdd-Vd)/Rd;

+

+Rs = (Vg-Vgsq)/Id;

+

+disp(Rs,'Rs(Ohms) = ');

+

diff --git a/69/CH7/EX7.17/7_17.sce b/69/CH7/EX7.17/7_17.sce
new file mode 100755
index 000000000..ad3ca86ef
--- /dev/null
+++ b/69/CH7/EX7.17/7_17.sce
@@ -0,0 +1,14 @@
+clear; clc; close;

+

+Id_on = 4*10^(-3);

+Vgs_on = 6;

+Vgs_th = 3;

+

+Vgs = Vgs_on;

+Vdd = 2*Vgs;

+Vds = Vgs;

+Id = Id_on;

+

+Rd = (Vdd-Vds)/Id;

+

+disp(Rd,'Rd(Ohms) = ');

diff --git a/69/CH7/EX7.18/7_18.sce b/69/CH7/EX7.18/7_18.sce
new file mode 100755
index 000000000..cf1b8342f
--- /dev/null
+++ b/69/CH7/EX7.18/7_18.sce
@@ -0,0 +1,49 @@
+clear; clc; close;

+

+Idss = 8*10^(-3);

+Vp = 4;

+Vdd = 20;

+Rd = 4*10^(3);

+Rs = 1.8*10^(3);

+

+Vg = 20*10^(3)*(-20)/((20+68)*10^(3));

+

+Vgs1 = 0;

+Id1 = Idss;

+Vgs2 = Vp/2;

+Id2 = Idss/4;

+Vgs3 = Vp;

+Id3 = 0;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+

+yi=smooth([x;y],0.1);

+a = gca();

+a.thickness = 2;

+a.data_bounds = [-5 0;5 8*10^(-3)];

+a.y_location = 'middle';

+a.x_label.text = 'Vgs';

+a.y_label.text = 'Id(mA)';

+a.title.text = 'Q-point for network';

+a.grid = [1 1];

+plot2d(yi(1,:)',yi(2,:)',[3]);

+

+

+Id1 = 0;

+Vgs1 = Vg+Id1*Rs;

+Vgs2 = 0;

+Id2 = (Vgs2-Vg)/Rs;

+Id3 = 4*10^(-3);

+Vgs3 = Vg+Id3*Rs;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+plot2d(x,y);

+

+

+Vgsq = 1.6;

+Idq = 3.1*10^(-3);

+Vds = -Vdd+Idq*(Rd+Rs);

+

+disp(Vgsq,'Q-point value of Vgs(found after interpolation) is :');

+disp(Idq,'Q-point value of Id(found after interpolation) is :');

+disp(Vds,'Vds(Volts) = ');

diff --git a/69/CH7/EX7.19/7_19.sce b/69/CH7/EX7.19/7_19.sce
new file mode 100755
index 000000000..dc293fb97
--- /dev/null
+++ b/69/CH7/EX7.19/7_19.sce
@@ -0,0 +1,14 @@
+clear; clc; close;

+

+Idss = 6*10^(-3);

+Vp = -3;

+Vdd = 16;

+Rd = 3.9*10^(3);

+Rs = 1.6*10^(3);

+

+m = abs(Vp)/(Idss*Rs);

+Idq = 0.18*Idss;

+Vgsq = -0.575*abs(Vp);

+

+disp(Vgsq,'Vgsq(Volts) = ');

+disp(Idq,'Idq(Amperes) = ');

diff --git a/69/CH7/EX7.2/7_2.jpg b/69/CH7/EX7.2/7_2.jpg
new file mode 100755
index 000000000..aceaf7207
--- /dev/null
+++ b/69/CH7/EX7.2/7_2.jpg
diff --git a/69/CH7/EX7.2/7_2.sce b/69/CH7/EX7.2/7_2.sce
new file mode 100755
index 000000000..3b2a4f787
--- /dev/null
+++ b/69/CH7/EX7.2/7_2.sce
@@ -0,0 +1,52 @@
+clear; clc; close;

+

+Idss = 8*10^(-3);

+Vp = -6;

+Vdd = 20;

+Rd = 3.3*10^(3);

+Rs = 1*10^(3);

+

+Vgs1 = Vp;

+Id1 = 0;

+Vgs2 = Vp/2;

+Id2 = Idss/4;

+Vgs3 = 0;

+Id3 = Idss;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+

+yi=smooth([x;y],0.1);

+a = gca();

+a.thickness = 2;

+a.y_location = 'right';

+a.x_label.text = 'Vgs';

+a.y_label.text = 'Id(mA)';

+a.title.text = 'Device characteristics JFET';

+a.grid = [1 1];

+plot2d(yi(1,:)',yi(2,:)',[3]);

+

+

+Vgs1 = 0;

+Id1 = 0;

+Id2 = 4*10^(-3);

+Vgs2 = -Id2*Rs;

+Id3 = 8*10^(-3);

+Vgs3 = -Id3*Rs;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+plot2d(x,y);

+

+Vgsq = -2.6;

+disp(Vgsq,'Q-point value of Vgs(found after interpolation) is :');

+

+Idq = 2.6*10^(-3);

+Vds = Vdd - Idq*(Rs+Rd);

+Vs = Idq*Rs;

+Vg  = 0;

+Vd = Vds + Vs;

+

+disp(Idq,'Idq(Amperes) = ');

+disp(Vds,'Vds(Volts) = ');

+disp(Vd,'Vd(Volts) = ');

+disp(Vg,'Vg(Volts) = ');

+disp(Vs,'Vs(Volts) = ');

diff --git a/69/CH7/EX7.20/7_20.sce b/69/CH7/EX7.20/7_20.sce
new file mode 100755
index 000000000..adfaa9cdc
--- /dev/null
+++ b/69/CH7/EX7.20/7_20.sce
@@ -0,0 +1,18 @@
+clear; clc; close;

+

+Idss = 8*10^(-3);

+Vp = -6;

+Vdd = 18;

+Rs = 1.2*10^(3);

+R1 = 2*10^(6);

+R2 = 470*10^(3);

+

+m = abs(Vp)/(Idss*Rs);

+Vg = R2*Vdd/(R1+R2);

+M = m*(Vg/abs(Vp));

+

+Idq = 0.52*Idss;

+Vgsq = -0.27*abs(Vp);

+

+disp(Vgsq,'Vgsq(Volts) = ');

+disp(Idq,'Idq(Amperes) = ');

diff --git a/69/CH7/EX7.3/7_3.jpg b/69/CH7/EX7.3/7_3.jpg
new file mode 100755
index 000000000..b7faaee20
--- /dev/null
+++ b/69/CH7/EX7.3/7_3.jpg
diff --git a/69/CH7/EX7.3/7_3.sce b/69/CH7/EX7.3/7_3.sce
new file mode 100755
index 000000000..3aecfd04b
--- /dev/null
+++ b/69/CH7/EX7.3/7_3.sce
@@ -0,0 +1,71 @@
+clear; clc; close;

+

+Rs = 100;

+Idss = 8*10^(-3);

+Vp = -6;

+Vdd = 20;

+

+Vgs1 = Vp;

+Id1 = 0;

+Vgs2 = Vp/2;

+Id2 = Idss/4;

+Vgs3 = 0;

+Id3 = Idss;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+

+yi=smooth([x;y],0.1);

+a = gca();

+a.thickness = 2;

+a.y_location = 'right';

+a.x_label.text = 'Vgs';

+a.y_label.text = 'Id(mA)';

+a.title.text = 'Device characteristics JFET';

+a.grid = [1 1];

+

+plot2d(yi(1,:)',yi(2,:)',[3]);

+

+

+Vgs1 = 0;

+Id1 = 0;

+Id2 = 4*10^(-3);

+Vgs2 = -Id2*Rs;

+Id3 = 8*10^(-3);

+Vgs3 = -Id3*Rs;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+plot2d(x,y);

+

+

+

+

+Idq = 6.4*10^(-3);

+Vgsq = -0.64;

+disp('From the figure,for part a  i.e Rs=100Kohm,we get ');

+disp(Idq,'Idq(Amperes) = ');

+disp(Vgsq,'Vgsq(Volts) = ');

+

+//part b

+

+Rs = 10*10^(3);

+Idss = 8*10^(-3);

+Vp = -6;

+Vdd = 20;

+

+

+

+Vgs1 = 0;

+Id1 = 0;

+Id2 = 4*10^(-3);

+Vgs2 = -Id2*Rs;

+Id3 = 8*10^(-3);

+Vgs3 = -Id3*Rs;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+plot2d(x,y);

+a.data_bounds = [-8 0;0 8*10^(-3)];

+Idq = 0.46*10^(-3);

+Vgsq = -4.6;

+disp('From the figure,for part b  i.e Rs=10Kohm,we get ')

+disp(Idq,'Idq(Amperes) = ');

+disp(Vgsq,'Vgsq(Volts) = ');

diff --git a/69/CH7/EX7.4/7_4.jpg b/69/CH7/EX7.4/7_4.jpg
new file mode 100755
index 000000000..c65b7f33a
--- /dev/null
+++ b/69/CH7/EX7.4/7_4.jpg
diff --git a/69/CH7/EX7.4/7_4.sce b/69/CH7/EX7.4/7_4.sce
new file mode 100755
index 000000000..c69614774
--- /dev/null
+++ b/69/CH7/EX7.4/7_4.sce
@@ -0,0 +1,54 @@
+clear; clc; close;

+

+Idss = 12*10^(-3);

+Vp = -6;

+Vdd = 12;

+Rd = 1.5*10^(3);

+Rs = 680;

+

+Vgs1 = Vp;

+Id1 = 0;

+Vgs2 = Vp/2;

+Id2 = Idss/4;

+Vgs3 = 0;

+Id3 = Idss;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+

+yi=smooth([x;y],0.1);

+a = gca();

+a.thickness = 2;

+a.y_location = 'right';

+a.x_label.text = 'Vgs';

+a.y_label.text = 'Id(mA)';

+a.title.text = 'Device characteristics JFET';

+a.grid = [1 1];

+plot2d(yi(1,:)',yi(2,:)',[3]);

+

+

+Vgs1 = 0;

+Id1 = 0;

+Id2 = 4*10^(-3);

+Vgs2 = -Id2*Rs;

+Id3 = 8*10^(-3);

+Vgs3 = -Id3*Rs;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+plot2d(x,y);

+

+

+Vgsq = -2.6;

+disp(Vgsq,'Q-point value of Vgs(found after interpolation) is :');

+

+Idq = 3.8*10^(-3);

+Vd = Vdd - Idq*Rd;

+Vg = 0;

+Vs = Idq*Rs;

+Vds = Vd-Vs;

+

+disp(Idq,'Idq(Amperes) = ');

+disp(Vds,'Vds(Volts) = ');

+disp(Vd,'Vd(Volts) = ');

+disp(Vg,'Vg(Volts) = ');

+disp(Vs,'Vs(Volts) = ');

+disp(Vds,'Vds(Volts) = ');

diff --git a/69/CH7/EX7.5/7_5.jpg b/69/CH7/EX7.5/7_5.jpg
new file mode 100755
index 000000000..cc2aa25c3
--- /dev/null
+++ b/69/CH7/EX7.5/7_5.jpg
diff --git a/69/CH7/EX7.5/7_5.sce b/69/CH7/EX7.5/7_5.sce
new file mode 100755
index 000000000..3b3cdae2c
--- /dev/null
+++ b/69/CH7/EX7.5/7_5.sce
@@ -0,0 +1,60 @@
+clear; clc; close;

+

+Idss = 8*10^(-3);

+Vp = -4;

+Vdd = 16;

+Rd = 2.4*10^(3);

+Rs = 1.5*10^(3);

+R1 = 2.1*10^(6);

+R2 = 0.27*10^(6);

+//finding Vg

+Vg = R2*Vdd/(R1+R2);

+

+//plotting transfer curve

+

+Vgs1 = Vp;

+Id1 = 0;

+Vgs2 = Vp/2;

+Id2 = Idss/4;

+Vgs3 = 0;

+Id3 = Idss;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+

+yi=smooth([x;y],0.1);

+a = gca();

+a.thickness = 2;

+a.y_location = 'right';

+a.x_label.text = 'Vgs';

+a.y_label.text = 'Id(mA)';

+a.title.text = 'Q-Point determination';

+a.grid = [1 1];

+plot2d(yi(1,:)',yi(2,:)',[3]);

+

+

+Id1 = 0;

+Vgs1 = Vg-Id1*Rs;

+Id2 = 4*10^(-3);

+Vgs2 = Vg-Id2*Rs;

+Id3 = 8*10^(-3);

+Vgs3 = Vg-Id3*Rs;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+plot2d(x,y);

+a.data_bounds = [-4 0;2 8*10^(-3)];

+

+

+Vgsq = -1.8;

+disp(Vgsq,'Q-point value of Vgs(found after interpolation) is :');

+

+Idq = 2.4*10^(-3);

+

+Vd = Vdd-Idq*Rd;

+Vs = Idq*Rs;

+Vds = Vdd - Idq*(Rd+Rs);

+

+disp(Idq,'Idq(Amperes) = ');

+disp(Vds,'Vds(Volts) = ');

+disp(Vd,'Vd(Volts) = ');

+disp(Vs,'Vs(Volts) = ');

+disp(Vds,'Vds(Volts) = ');

diff --git a/69/CH7/EX7.6/7_6.jpg b/69/CH7/EX7.6/7_6.jpg
new file mode 100755
index 000000000..b85fc66d9
--- /dev/null
+++ b/69/CH7/EX7.6/7_6.jpg
diff --git a/69/CH7/EX7.6/7_6.sce b/69/CH7/EX7.6/7_6.sce
new file mode 100755
index 000000000..69f6c3ea8
--- /dev/null
+++ b/69/CH7/EX7.6/7_6.sce
@@ -0,0 +1,58 @@
+clear; clc; close;

+

+Idss = 9*10^(-3);

+Vp = -3;

+Vdd = 20;

+Vss = 10;

+Rd = 1.8*10^(3);

+Rs = 1.5*10^(3);

+

+

+Vgs1 = Vp;

+Id1 = 0;

+Vgs2 = Vp/2;

+Id2 = Idss/4;

+Vgs3 = 0;

+Id3 = Idss;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+

+yi=smooth([x;y],0.1);

+a = gca();

+a.thickness = 2;

+a.y_location = 'right';

+a.x_label.text = 'Vgs';

+a.y_label.text = 'Id(mA)';

+a.title.text = 'Q-point for network';

+a.grid = [1 1];

+plot2d(yi(1,:)',yi(2,:)',[3]);

+

+

+

+Id1 = 0;

+Vgs1 = Vss-Id1*Rs;

+Id2 = 4*10^(-3);

+Vgs2 = Vss-Id2*Rs;

+Id3 = 8*10^(-3);

+Vgs3 = Vss-Id3*Rs;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+plot2d(x,y);

+a.data_bounds = [-3 0;10 9*10^(-3)];

+

+

+

+Vgsq = -0.35;

+disp(Vgsq,'Q-point value of Vgs(found after interpolation) is :');

+

+Idq = 6.9*10^(-3);

+

+Vds = Vdd+Vss-Idq*(Rd+Rs);

+Vd = Vdd-Idq*Rd;

+Vs = Vd-Vds;

+

+disp(Idq,'Idq(Amperes) = ');

+disp(Vds,'Vds(Volts) = ');

+disp(Vd,'Vd(Volts) = ');

+disp(Vs,'Vs(Volts) = ');

+disp(Vds,'Vds(Volts) = ');

diff --git a/69/CH7/EX7.7/7_7.jpg b/69/CH7/EX7.7/7_7.jpg
new file mode 100755
index 000000000..2448f1767
--- /dev/null
+++ b/69/CH7/EX7.7/7_7.jpg
diff --git a/69/CH7/EX7.7/7_7.sce b/69/CH7/EX7.7/7_7.sce
new file mode 100755
index 000000000..b209c0e5c
--- /dev/null
+++ b/69/CH7/EX7.7/7_7.sce
@@ -0,0 +1,54 @@
+clear; clc; close;

+

+Idss = 6*10^(-3);

+Vp = -3;

+Vdd = 18;

+Rd = 1.8*10^(3);

+Rs = 750;

+

+Vg = 10*10^(6)*18/((10+110)*10^(6));

+

+Vgs1 = Vp;

+Id1 = 0;

+Vgs2 = Vp/2;

+Id2 = Idss/4;

+Vgs3 = 0;

+Id3 = Idss;

+Vgs4 = 1;

+Id4 = Idss*(1-(Vgs4/Vp))^2;

+disp(Id4);

+x = [Vgs1 Vgs2 Vgs3 Vgs4];

+y = [Id1 Id2 Id3 Id4];

+

+yi=smooth([x;y],0.1);

+a = gca();

+a.thickness = 2;

+a.y_location = 'right';

+a.x_label.text = 'Vgs';

+a.y_label.text = 'Id(mA)';

+a.title.text = 'Q-point for network';

+a.grid = [1 1];

+plot2d(yi(1,:)',yi(2,:)',[3]);

+

+

+Id1 = 0;

+Vgs1 = Vg-Id1*Rs;

+Id2 = 3*10^(-3);

+Vgs2 = Vg-Id2*Rs;

+Id3 = 6*10^(-3);

+Vgs3 = Vg-Id3*Rs;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+plot2d(x,y);

+a.data_bounds = [-3 0;2 10*10^(-3)];

+

+

+Vgsq = -0.8;

+disp(Vgsq,'Q-point value of Vgs(found after interpolation) is :');

+

+Idq = 3.1*10^(-3);

+

+Vds = Vdd - Idq*(Rd+Rs);

+

+disp(Idq,'Idq(Amperes) = ');

+disp(Vds,'Vds(Volts) = ');

diff --git a/69/CH7/EX7.8/7_8.jpg b/69/CH7/EX7.8/7_8.jpg
new file mode 100755
index 000000000..6f74d04a6
--- /dev/null
+++ b/69/CH7/EX7.8/7_8.jpg
diff --git a/69/CH7/EX7.8/7_8.sce b/69/CH7/EX7.8/7_8.sce
new file mode 100755
index 000000000..0e77b2f49
--- /dev/null
+++ b/69/CH7/EX7.8/7_8.sce
@@ -0,0 +1,59 @@
+clear; clc; close;

+

+Idss = 6*10^(-3);

+Vp = -3;

+Vdd = 18;

+Rd = 1.8*10^(3);

+Rs = 150;

+

+

+Vg = 10*10^(6)*18/((10+110)*10^(6));

+

+Vgs1 = Vp;

+Id1 = 0;

+Vgs2 = Vp/2;

+Id2 = Idss/4;

+Vgs3 = 0;

+Id3 = Idss;

+Vgs4 = 1;

+Id4 = Idss*(1-(Vgs4/Vp))^2;

+disp(Id4);

+x = [Vgs1 Vgs2 Vgs3 Vgs4];

+y = [Id1 Id2 Id3 Id4];

+

+yi=smooth([x;y],0.1);

+a = gca();

+a.thickness = 2;

+a.y_location = 'right';

+a.x_label.text = 'Vgs';

+a.y_label.text = 'Id(mA)';

+a.title.text = 'Q-point for network';

+a.grid = [1 1];

+plot2d(yi(1,:)',yi(2,:)',[3]);

+

+

+Id1 = 0;

+Vgs1 = Vg-Id1*Rs;

+Id2 = 3*10^(-3);

+Vgs2 = Vg-Id2*Rs;

+Id3 = 6*10^(-3);

+Vgs3 = Vg-Id3*Rs;

+Vgs4 = 0;

+Id4 = (Vg - Vgs4)/Rs;

+x = [Vgs1 Vgs2 Vgs3 Vgs4];

+y = [Id1 Id2 Id3 Id4];

+plot2d(x,y);

+a.data_bounds = [-3 0;2 10*10^(-3)];

+

+

+

+

+Vgsq = 0.35;

+disp(Vgsq,'Q-point value of Vgs(found after interpolation) is :');

+

+Idq = 7.6*10^(-3);

+

+Vds = Vdd - Idq*(Rd+Rs);

+

+disp(Idq,'Idq(Amperes) = ');

+disp(Vds,'Vds(Volts) = ');

diff --git a/69/CH7/EX7.9/7_9.jpg b/69/CH7/EX7.9/7_9.jpg
new file mode 100755
index 000000000..20e7b460a
--- /dev/null
+++ b/69/CH7/EX7.9/7_9.jpg
diff --git a/69/CH7/EX7.9/7_9.sce b/69/CH7/EX7.9/7_9.sce
new file mode 100755
index 000000000..a56e521d8
--- /dev/null
+++ b/69/CH7/EX7.9/7_9.sce
@@ -0,0 +1,51 @@
+clear; clc; close;

+

+Idss = 8*10^(-3);

+Vp = -8;

+Vdd = 20;

+Rd = 6.2*10^(3);

+Rs = 2.4*10^(3);

+

+Vgs1 = Vp;

+Id1 = 0;

+Vgs2 = Vp/2;

+Id2 = Idss/4;

+Vgs3 = 0;

+Id3 = Idss;

+Vgs4 = 2;

+Id4 = Idss*(1-(Vgs4/Vp))^2;

+x = [Vgs1 Vgs2 Vgs3 Vgs4];

+y = [Id1 Id2 Id3 Id4];

+

+yi=smooth([x;y],0.1);

+a = gca();

+a.thickness = 2;

+a.y_location = 'right';

+a.x_label.text = 'Vgs';

+a.y_label.text = 'Id(mA)';

+a.title.text = 'Q-point for the network';

+a.grid = [1 1];

+plot2d(yi(1,:)',yi(2,:)',[3]);

+

+

+Vgs1 = 0;

+Id1 = 0;

+Id2 = 4*10^(-3);

+Vgs2 = -Id2*Rs;

+Id3 = 8*10^(-3);

+Vgs3 = -Id3*Rs;

+x = [Vgs1 Vgs2 Vgs3];

+y = [Id1 Id2 Id3];

+plot2d(x,y);

+a.data_bounds = [-8 0;0 13*10^(-3)];

+

+

+Vgsq = -4.3;

+disp(Vgsq,'Q-point value of Vgs(found after interpolation) is :');

+

+Idq = 1.7*10^(-3);

+

+Vd = Vdd - Idq*(Rd);

+

+disp(Idq,'Idq(Amperes) = ');

+disp(Vd,'Vd(Volts) = ');