initial commit / add all books

7 files changed, 126 insertions, 0 deletions

diff --git a/1223/CH2/EX2.1/Ex2_1.sce b/1223/CH2/EX2.1/Ex2_1.sce
new file mode 100755
index 000000000..bd03cad4a
--- /dev/null
+++ b/1223/CH2/EX2.1/Ex2_1.sce
@@ -0,0 +1,29 @@
+clear;

+clc;

+//Example 2.1

+v_I=120;//(V)rms primary input  

+v_o=9;//(V)peak output voltage

+V_Y=0.7;//(V)diode cut in voltage

+//for center-tapped transformer circuit in fig.2.6(a)

+v_S=v_o+V_Y//(V)peak value of secondary voltage

+printf('\npeak value of secondary voltage=%.2f V\n',v_S)

+v_S_rms=v_S/sqrt(2)//for a sinusoidal signal rms value of v_S

+printf('\nrms value of v_S=%.2f V\n',v_S_rms)

+//let turns ratio of the primary to secondary winding be x=N1/N2

+x=v_I/v_S_rms;

+printf('\nturns ratio=%f \n',x)

+//for the bridge circuit in fig.2.7(a)

+v_Sb=v_o+2*V_Y;//(V)peak value of secondary voltage

+printf('\npeak value of secondary voltage=%.2f V\n',v_Sb)

+v_S_rms=v_Sb/sqrt(2);//for a sinusoidal signal rms value of v_S

+printf('\nrms value of v_S=%f V\n',v_S_rms)

+//let turns ratio of the primary to secondary winding be x=N1/N2

+x=v_I/v_S_rms;

+printf('\nturns ratio=%f\n',x)

+//for center tapped rectifier

+PIV=2*v_S-V_Y;

+printf('\npeak inverse voltage of a diode=%f V\n',PIV)

+//for the bridge rectifier peak inverse voltage of a diode

+PIV=v_Sb-V_Y;

+printf('\npeak inverse voltage of a diode=%.2f V\n',PIV)

+//advantage of bridge rectifier over center tapped rectifier is it requies only half of the turns

diff --git a/1223/CH2/EX2.10/Ex2_10.sce b/1223/CH2/EX2.10/Ex2_10.sce
new file mode 100755
index 000000000..404ea6417
--- /dev/null
+++ b/1223/CH2/EX2.10/Ex2_10.sce
@@ -0,0 +1,9 @@
+clear;

+clc;

+//Example 2.10

+n=1;//quantum efficiency

+A=10^-2;//cm^2 junction area

+p=5*10^17;//(cm^-2-s^-1) incident photon flux

+e=1.6*10^-16;//charge of an electron

+Iph=n*e*p*A;

+printf('\nphotocurrent=%0.1f mA\n',Iph)

diff --git a/1223/CH2/EX2.11/Ex2_11.sce b/1223/CH2/EX2.11/Ex2_11.sce
new file mode 100755
index 000000000..c556e510f
--- /dev/null
+++ b/1223/CH2/EX2.11/Ex2_11.sce
@@ -0,0 +1,8 @@
+clear;

+clc;

+//Example 2.11

+I=0.01;//(A) diode current

+V_Y=1.7;//(V) forward bias voltage drop

+Vt=0.2;//(V)

+R=(5-V_Y-Vt)/I;

+printf('\nresistance=%0.1f Ohm',R)

diff --git a/1223/CH2/EX2.2/Ex2_2.sce b/1223/CH2/EX2.2/Ex2_2.sce
new file mode 100755
index 000000000..48c645877
--- /dev/null
+++ b/1223/CH2/EX2.2/Ex2_2.sce
@@ -0,0 +1,10 @@
+clear;

+clc;

+//Example 2.2

+//full wave rectifier circuit with 60Hz input signal

+V_M=10;//(V)peak output voltage

+R=0.01;//(MOhm)output load resistance

+f=60;//Hz

+V_r=0.2;//(V)ripple voltage

+C=V_M/(2*f*R*V_r);//capacitance

+printf('\ncapacitance=%f microF\n',C)

diff --git a/1223/CH2/EX2.3/Ex2_3.sce b/1223/CH2/EX2.3/Ex2_3.sce
new file mode 100755
index 000000000..342a761b5
--- /dev/null
+++ b/1223/CH2/EX2.3/Ex2_3.sce
@@ -0,0 +1,29 @@
+clear;

+clc;

+//Example 2.3

+V_O=12;//(V)peak output voltage

+I_L=0.12;//(A)current delivered to the load

+R=V_O/I_L;

+printf('\neffective load resistance=%.2f Ohm\n',R)

+V_Y=0.7;//(V)diode cut in voltage

+v_S=V_O+2*V_Y;

+printf('\npeak value of v_S=%.2f V\n',v_S)

+v_Srms=v_S/sqrt(2);

+printf('\nrms voltage=%.2f V\n',v_Srms)

+//let x=N1/N2

+Vin=120;//(V)input line voltage

+x=Vin/v_Srms;

+printf('\nturns ratio=%.2f \n',x)

+VM=12;//(V)

+Vr=5/100*VM;

+printf('\nripple voltage=%.2f V\n',Vr)

+f=60;//(Hz) input frequency

+C=VM/(2*R*Vr*f);

+printf('\nfilter capacitance=%f F\n',C)

+i_Dmax=(VM/R)*(1+2*%pi*sqrt(VM/(2*Vr)));

+printf('\npeak diode current=%.2f A\n',i_Dmax)

+R=0.1;//Kohm

+i_Davg=(1/(2*%pi))*sqrt(2*Vr/VM)*((VM/R)*(1+%pi*sqrt(VM/(2*Vr))));

+printf('\naverage diode current=%f mA\n',i_Davg)

+PIV=v_S-V_Y;

+printf('\npeak inverse voltage=%.2f V\n',PIV)

diff --git a/1223/CH2/EX2.5/Ex2_5.sce b/1223/CH2/EX2.5/Ex2_5.sce
new file mode 100755
index 000000000..de67161f5
--- /dev/null
+++ b/1223/CH2/EX2.5/Ex2_5.sce
@@ -0,0 +1,12 @@
+clear;

+clc;

+//Example 2.5

+rZ=4;//(Ohm) Zener resistance

+V_Lnom=9;//(V) nominal output voltage

+Izmax=0.3;//(A) maximum zener diode current

+Izmin=0.03;//(A) minimum zener diode current

+V_Lmax=V_Lnom+Izmax*rZ

+V_Lmin=V_Lnom+Izmin*rZ

+//percent regulation R

+R=((V_Lmax-V_Lmin)/V_Lnom)*100;

+printf('\npercent regulation=%0.1f \n',R)

diff --git a/1223/CH2/EX2.8/Ex2_8.sce b/1223/CH2/EX2.8/Ex2_8.sce
new file mode 100755
index 000000000..2b432da18
--- /dev/null
+++ b/1223/CH2/EX2.8/Ex2_8.sce
@@ -0,0 +1,29 @@
+clear;

+clc;

+//Example 2.8

+R1=5;R2=10;//(KOhm) 

+V_Y=0.7;//(V)diode cut in voltage

+V1=5;V2=-5;//(V)

+vt=0;//(V)

+//asssuming initially diode D1 is off

+//iR1=iD2=iR2=V1-V2-V_Y/(R1+R2)

+iD2=(V1-V2-V_Y)/(R1+R2);

+printf('\ndiode current=%0.2f mA\n',iD2)

+iR1=iD2;

+vo=V1-iR1*R1;

+printf('\noutput voltage=%0.2f V\n',vo)

+v=vo-V_Y;//v=v'

+printf('\nVoltage=%0.1f V\n',v)

+vt=4;//(V)fig.2.33

+//both D1 and D2 are on

+vo==vt;

+vo=4;

+iD2=(V1-vo)/R1;

+printf('\ndiode current=%.2f mA\n',iD2)

+iR1==iD2;

+v=vo-V_Y;

+printf('\nV=%.2f V\n',v)

+iR2=(v-V2)/R2;

+printf('\niR2=%.2f mA\n',iR2)

+iD1=iR2-iD2;

+printf('\ncurrent through D1=%.2f mA\n',iD1)