initial commit / add all books

11 files changed, 158 insertions, 0 deletions

diff --git a/1223/CH12/EX12.1/Ex12_1.sce b/1223/CH12/EX12.1/Ex12_1.sce
new file mode 100755
index 000000000..457d63894
--- /dev/null
+++ b/1223/CH12/EX12.1/Ex12_1.sce
@@ -0,0 +1,11 @@
+clear;

+clc;

+//Example 12.1

+A=10^5;//open loop gain

+Af=50;//closed loop gain

+b=(A/Af-1)/A;

+printf('\nfeedback transfer function=%f\n',b)

+A=-10^5;

+Af=-50;

+b=(A/Af-1)/A;

+printf('\nfeedback transfer function=%f\n',b)

diff --git a/1223/CH12/EX12.11/Ex12_11.sce b/1223/CH12/EX12.11/Ex12_11.sce
new file mode 100755
index 000000000..386f757d4
--- /dev/null
+++ b/1223/CH12/EX12.11/Ex12_11.sce
@@ -0,0 +1,25 @@
+clear;

+clc;

+//Example 12.11

+hFE=100;//transistor parameter

+Vbe=0.7;

+Vcc=10;

+R1=55;

+R2=12;

+Re=1;

+Rc=4;

+Rl=4;

+Icq=0.983;

+Vceq=5.08;

+Vt=0.026;

+r=hFE*Vt/Icq;

+printf('\nsmall signal parameter resistance=%.2f KOhm\n',r)

+gm=Icq/Vt;

+printf('\ntransconductance=%.3f mA/V\n',gm)

+Agf=-gm*(Rc/(Rc+Rl))/(1+Re*(gm+1/r));

+printf('\ntransconductance transfer function=%.3f mA/V\n',Agf)

+//as first approximation

+Agf2=-1/Re;

+printf('\nAgf=%.2f mA/V\n',Agf2)

+Avf=Agf*Rl;

+printf('\nvoltage gain=%.2f\n',Avf)

diff --git a/1223/CH12/EX12.16/Ex12_16.sce b/1223/CH12/EX12.16/Ex12_16.sce
new file mode 100755
index 000000000..067c17d40
--- /dev/null
+++ b/1223/CH12/EX12.16/Ex12_16.sce
@@ -0,0 +1,22 @@
+clear;

+clc;

+//Example 12.15

+//Determine the loop gain fig12.45(a)

+hFE=100;

+Vbe=0.7;

+Icq=0.492;

+r=5.28;

+gm=18.9;

+Rs=10;

+R1=51;

+R2=5.5;

+Re=0.500;

+Rc=10;

+Rf=82;

+x=r*R2/(r+R2);

+y=R1*x/(x+R1);

+t=Rs*y/(y+Rs);

+Req=t;

+printf('\nequivalent resistance=%.2f KOhm\n',t)

+T=gm*Rc*Req/(Rc+Rf+Req);

+printf('\nthe loop gain=%.2f\n',T)

diff --git a/1223/CH12/EX12.19/Ex12_19.sce b/1223/CH12/EX12.19/Ex12_19.sce
new file mode 100755
index 000000000..59487c6fc
--- /dev/null
+++ b/1223/CH12/EX12.19/Ex12_19.sce
@@ -0,0 +1,14 @@
+clear;

+clc;

+//Example 12.19

+//T=b*100/(sqrt(1+(f/10^5)^2) angle=-3tan^-1(f/10^5)

+//stable at f180 at which phase becomes -180 degrees

+//-3*atan(f180/10^5)=-180

+f180=tand(180/3)*10^5;

+printf('\nfrequency at -180 degree=%ef Hz\n',f180)

+b=0.2;

+T=b*100/(sqrt(1+(f180/10^5)^2))^3;

+printf('\nmagnitude of the loop gain=%.2f\n',T)

+b=0.02;

+T=b*100/(sqrt(1+(f180/10^5)^2))^3;

+printf('\nmagnitude of the loop gain=%.2f\n',T)

diff --git a/1223/CH12/EX12.2/Ex12_2.sce b/1223/CH12/EX12.2/Ex12_2.sce
new file mode 100755
index 000000000..b80559b2f
--- /dev/null
+++ b/1223/CH12/EX12.2/Ex12_2.sce
@@ -0,0 +1,13 @@
+clear;

+clc;

+//Example 12.2

+A=10^5;

+Af=50;

+b=0.019999;

+dA=10^4;

+dAf=Af*dA/(A*(1+b*A));

+printf('\ndAf=%e\n',dAf)

+//x=dAf/Af

+x=dAf/Af;

+x=x*100;

+printf('\npercent change dAf/Af=%f\n',x)

diff --git a/1223/CH12/EX12.22/Ex12_22.sce b/1223/CH12/EX12.22/Ex12_22.sce
new file mode 100755
index 000000000..caab2aad9
--- /dev/null
+++ b/1223/CH12/EX12.22/Ex12_22.sce
@@ -0,0 +1,10 @@
+clear;

+clc;

+//Example 12.22

+Ao=10^6;

+fPD=0.010;//KHz

+b=0.01;

+Af=Ao/(1+b*Ao);

+printf('\nlow frequency closed loop gain=%.2f\n',Af)

+fc=fPD*(1+b*Ao);

+printf('\nclosed loop 3dB frequency=%.2f KHz\n',fc)

diff --git a/1223/CH12/EX12.23/Ex12_23.sce b/1223/CH12/EX12.23/Ex12_23.sce
new file mode 100755
index 000000000..740d94362
--- /dev/null
+++ b/1223/CH12/EX12.23/Ex12_23.sce
@@ -0,0 +1,10 @@
+clear;

+clc;

+//Example 12.23

+A=10^3;

+Cf=30*10^-12;//feedback capacitor (F)

+R2=5*10^5;

+Cm=Cf*(1+A);

+printf('\nMiller capacitance=%e F\n',Cm)

+fp=1/(2*%pi*R2*Cm);

+printf('\ndominant pole frequency =%.2fHz\n',fp)

diff --git a/1223/CH12/EX12.3/Ex12_3.sce b/1223/CH12/EX12.3/Ex12_3.sce
new file mode 100755
index 000000000..a13e4756b
--- /dev/null
+++ b/1223/CH12/EX12.3/Ex12_3.sce
@@ -0,0 +1,11 @@
+clear;

+clc;

+//Example 12.3

+Ao=10^4;

+wh=2*%pi*100;//rad/s

+Af=50;

+//x=(1+bAo)

+x=Ao/Af;

+printf('\n(1+bAo)=%f\n',x)

+wfh=wh*x;

+printf('\nclosed loop bandwidth=%f\n',wfh)

diff --git a/1223/CH12/EX12.5/Ex12_5.sce b/1223/CH12/EX12.5/Ex12_5.sce
new file mode 100755
index 000000000..8456b3ea8
--- /dev/null
+++ b/1223/CH12/EX12.5/Ex12_5.sce
@@ -0,0 +1,15 @@
+clear;

+clc;

+//Example 12.5

+Av=10^5;

+Avf=50;

+Rf=10;//Kohm

+Ro=20000;//Ohm

+//x=(1+bvAv)

+x=Av/Avf;

+printf('\n(1+bvAv)=%.e\n',x)

+Rif=Rf*x;

+Rif=Rif*0.001;//MOhm

+printf('\ninput resistance=%.2f MOhm\n',Rif)

+Rof=Ro/x;

+printf('\noutput resistance=%.2f Ohm\n',Rof)

diff --git a/1223/CH12/EX12.6/Ex12_6.sce b/1223/CH12/EX12.6/Ex12_6.sce
new file mode 100755
index 000000000..d491874a1
--- /dev/null
+++ b/1223/CH12/EX12.6/Ex12_6.sce
@@ -0,0 +1,15 @@
+clear;

+clc;

+//Example 12.6

+Af=10^5;

+Aif=50;

+Rf=10000;

+Ro=20;

+//x=(1+biAi)

+x=Af/Aif;

+printf('\n(1+biAi)=%.e\n',x)

+Rif=Rf/x;

+printf('\ninput resistance =%.2fOhm\n',Rif)

+Rof=Ro*x;

+Rof=Rof*0.001;//Mohm

+printf('\noutput resistance=%.2f MOhm\n',Rof)

diff --git a/1223/CH12/EX12.7/Ex12_7.sce b/1223/CH12/EX12.7/Ex12_7.sce
new file mode 100755
index 000000000..6edce62f2
--- /dev/null
+++ b/1223/CH12/EX12.7/Ex12_7.sce
@@ -0,0 +1,12 @@
+clear;

+clc;

+//Example 12.7

+Ri=50;

+R1=10;

+R2=90;

+Av=10^4;

+bv=1/(1+R2/R1);

+printf('\nfeedback transfer function=%.2f\n',bv)

+Rif=Ri*(1+bv*Av);

+Rif=Rif*0.001;//Mohm

+printf('\ninput resistance=%.2f MOhm\n',Rif)