From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 1223/CH2/EX2.1/Ex2_1.sce   | 29 +++++++++++++++++++++++++++++
 1223/CH2/EX2.10/Ex2_10.sce |  9 +++++++++
 1223/CH2/EX2.11/Ex2_11.sce |  8 ++++++++
 1223/CH2/EX2.2/Ex2_2.sce   | 10 ++++++++++
 1223/CH2/EX2.3/Ex2_3.sce   | 29 +++++++++++++++++++++++++++++
 1223/CH2/EX2.5/Ex2_5.sce   | 12 ++++++++++++
 1223/CH2/EX2.8/Ex2_8.sce   | 29 +++++++++++++++++++++++++++++
 7 files changed, 126 insertions(+)
 create mode 100755 1223/CH2/EX2.1/Ex2_1.sce
 create mode 100755 1223/CH2/EX2.10/Ex2_10.sce
 create mode 100755 1223/CH2/EX2.11/Ex2_11.sce
 create mode 100755 1223/CH2/EX2.2/Ex2_2.sce
 create mode 100755 1223/CH2/EX2.3/Ex2_3.sce
 create mode 100755 1223/CH2/EX2.5/Ex2_5.sce
 create mode 100755 1223/CH2/EX2.8/Ex2_8.sce

(limited to '1223/CH2')

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)
-- 
cgit