initial commit / add all books

20 files changed, 404 insertions, 0 deletions

diff --git a/3754/CH20/EX20.1/20_1.sce b/3754/CH20/EX20.1/20_1.sce
new file mode 100644
index 000000000..65b6a034f
--- /dev/null
+++ b/3754/CH20/EX20.1/20_1.sce
@@ -0,0 +1,14 @@
+clear//

+

+//Variables

+

+dVL = 100.0 * 10**-6                 //Change in output voltage (in volts)

+dVin = 5.0                           //Change in input voltage (in volts)

+

+//Calculation

+

+LR = dVL / dVin                      //Line regulation (in volt per volt)

+

+//Result

+

+printf("\n The value of line regulation is  %0.3f  micro-volt/volt.",LR * 10**6)

diff --git a/3754/CH20/EX20.10/20_10.sce b/3754/CH20/EX20.10/20_10.sce
new file mode 100644
index 000000000..d26e1764a
--- /dev/null
+++ b/3754/CH20/EX20.10/20_10.sce
@@ -0,0 +1,20 @@
+clear//

+

+//Variables

+

+VZ = 10.0                                //Zener voltage (in volts)

+VSmin = 13.0                             //Minimum source voltage (in volts)

+VSmax = 16.0                             //Maximum source voltage (in volts)

+ILmin = 10.0                             //Minimum load current (in milli-Ampere)

+ILmax = 85.0                             //Maximum load current (in milli-Ampere)

+IZmin = 15.0                             //Minimum zener current (in milli-Ampere)

+

+//Calculation

+

+RSmax = (VSmin - VZ)/ (IZmin + ILmax)    //Maximum value of RS (in kilo-ohm)

+IZmax = (VSmax - VZ)/ RSmax - ILmin      //Maximum zener current (in milli-Ampere)

+PZmax = IZmax * 10**-3 * VZ              //Maximum power dissipation in zener (in watt)

+

+//Result

+

+printf("\n Maximum value of RS is  %0.3f  ohm.\nMaximum power dissipation be the zener diode is  %0.3f  W.",RSmax*10**3,PZmax)

diff --git a/3754/CH20/EX20.11/20_11.sce b/3754/CH20/EX20.11/20_11.sce
new file mode 100644
index 000000000..1f1868ec4
--- /dev/null
+++ b/3754/CH20/EX20.11/20_11.sce
@@ -0,0 +1,23 @@
+clear//

+

+//Variables

+

+VSmin = 19.5                            //Minimum source voltage (in volts)

+VSmax = 22.5                            //Maximum source voltage (in volts)

+RL = 6.0 * 10**3                        //Load resistance (in ohm)

+VZ = 18.0                               //Zener voltage (in volts)

+IZmin = 2.0 * 10**-6                    //Minimum zener current (in Ampere)

+PZmax = 60.0 * 10**-3                   //Maximum power dissipation (in watt)

+rZ = 20.0                               //Zener resistance (in ohm)

+VL = VZ                                 //Voltage across load resistance (in volt)

+

+//Calculation

+

+IZmax = (PZmax / rZ)**0.5                //Maximum value of zener current (in milli-Ampere)

+IL = VL / RL                             //Load current (in milli-Ampere)

+RSmax = (VSmin - VZ) / (IZmin + IL)      //Maximum value of regulating resistance (in kilo-ohm)  

+RSmin = (VSmax - VZ) / (IZmax + IL)      //Minimum value of regulating resistance (in kilo-ohm) 

+

+//Result

+

+printf("\n Magnitude of regulating resistance should be between  %0.1f  ohm and  %0.0f  ohm.",RSmin,RSmax)

diff --git a/3754/CH20/EX20.12/20_12.sce b/3754/CH20/EX20.12/20_12.sce
new file mode 100644
index 000000000..18c415e8f
--- /dev/null
+++ b/3754/CH20/EX20.12/20_12.sce
@@ -0,0 +1,22 @@
+clear//

+

+//Variables

+

+VSmin = 8.0                    //Minimum source voltage (in volts)

+VSmax = 12                     //Maximum source voltage (in volts)

+RS = 2.2                       //Resistance (in kilo-ohm)

+VZ = 5.0                       //Zener voltage (in volts)

+RL = 10.0                      //Load resistance (in kilo-ohm)

+VL = VZ                        //Voltage across load (in volts)

+

+//Calculation

+

+ISmin = (VSmin - VZ)/ RS       //Minimum value of input current (in milli-Ampere)

+ISmax = (VSmax - VZ)/RS        //Maximum value of input current (in milli-Ampere)    

+IL = VL / RL                   //Load current (in milli-Ampere)

+IZmin = ISmin - IL             //Minimum Zener current (in milli-Ampere)

+IZmax = ISmax - IL             //Maximum Zener current (in milli-Ampere)   

+

+//Result

+

+printf("\n Minimum value of Zener current is  %0.3f  mA.\nMaximum value of Zener current is  %0.3f  mA.",IZmin,IZmax)

diff --git a/3754/CH20/EX20.13/20_13.sce b/3754/CH20/EX20.13/20_13.sce
new file mode 100644
index 000000000..59504e9a4
--- /dev/null
+++ b/3754/CH20/EX20.13/20_13.sce
@@ -0,0 +1,23 @@
+clear//

+

+//Variables

+

+VO=5.0;VL=5.0;

+IL = 20.0                         //Load current (in milli-Ampere)

+PZmax = 500.0                     //Maximum power dissipation in zener (in milli-watt)

+VSmin = 9.0                       //Minimum source voltage (in volts)

+VSmax = 15.0                      //Maximum source voltage (in volts)

+VZ = 5

+IZ =20

+//Calculation

+

+IZmax = PZmax / VZ                //Maximum zener current (in milli-Ampere)

+ISmax = IL + IZ                   //Maximum input current (in milli-Ampere)

+RSmin = (VSmax - VZ)/(IZmax + IL) //Minimum value of regulating resistance (in kilo-ohm)

+IZ = (VSmin - VZ)/ RSmin - IL     //Minimum value of zener current           

+

+//Result

+

+printf("\n Input varies from the normal 12 v within the range of +- 3 V.")

+printf("\n Zener current vary from  %0.3f  mA to  %0.3f  mA.",IZ,IZmax)

+printf("\n For safety purpose RS should be 220 ohm.")

diff --git a/3754/CH20/EX20.14/20_14.sce b/3754/CH20/EX20.14/20_14.sce
new file mode 100644
index 000000000..d74d6ca5b
--- /dev/null
+++ b/3754/CH20/EX20.14/20_14.sce
@@ -0,0 +1,19 @@
+clear//

+

+//Variables

+

+RS = 500.0                                    //Series resistance (in ohm)

+RL = 1.0                                      //Load resistance (in kilo-ohm) 

+VZ = 10.0                                     //Zener voltage (in volts)

+IZmin = 5.0                                   //Minimum Zener current (in milli-Ampere)

+IZmax = 55.0                                  //Maximum Zener current (in milli-Ampere)   

+

+//Calculation

+

+IL = VZ / RL                                  //Load current (in milli-Ampere) 

+VSmin = (IL + IZmin) * RS * 10**-3 + VZ       //Minimum value of input voltage (in volts)

+VSmax = (IL + IZmax) * RS * 10**-3 + VZ       //Maximum value of input voltage (in volts)

+

+//Result

+

+printf("\n The minimum value of voltage level at input is  %0.3f  V and the maximum is  %0.3f  V.",VSmin,VSmax)

diff --git a/3754/CH20/EX20.15/20_15.sce b/3754/CH20/EX20.15/20_15.sce
new file mode 100644
index 000000000..bd487ce2d
--- /dev/null
+++ b/3754/CH20/EX20.15/20_15.sce
@@ -0,0 +1,26 @@
+clear//

+

+//Variables

+

+VS = 15.0                   //Input voltage (in volts)

+RS = 33.0                   //Series resistance (in ohm)

+beta = 100.0                //common-emitter current gain 

+RL = 100.0                  //Load resistance (in ohm)

+VZ = 10.0                   //Voltage across zener diode (in volts) 

+VBE = 0.7                   //Voltage across base and emitter

+

+//Calculation

+

+VL = VZ + VBE               //Load voltage (in volts)

+IL = VL / RL                //Load current (in Ampere)

+IS = (VS - VL) / RS         //Current through RS (in Ampere)

+IC = IS - IL                //Collector current (in Ampere)

+IB=IC/beta;IZ=IC/beta;

+

+//Result

+

+printf("\n Load voltage is  %0.3f  V.",VL)

+printf("\n Load current is  %0.3f  mA.",IL * 10**3)

+printf("\n Current  through Rs is  %0.1f  mA.",IS * 10**3)

+printf("\n Collector current is  %0.1f  mA.",IC* 10**3)

+printf("\n Base current is  %0.0f  micro-A." ,IB * 10**6)

diff --git a/3754/CH20/EX20.16/20_16.sce b/3754/CH20/EX20.16/20_16.sce
new file mode 100644
index 000000000..4c0729d95
--- /dev/null
+++ b/3754/CH20/EX20.16/20_16.sce
@@ -0,0 +1,28 @@
+clear//

+

+//Variables

+

+VS = 15.0                      //Input voltage (in volts)

+VZ = 8.3                       //Zener voltage (in volts)

+beta = 100.0                   //Common-emitter current gain

+R = 1.8                        //Resistance (in kilo-ohm)

+RL = 2.0                       //Resistance (in kilo-ohm)

+VBE = 0.7                      //Voltage across base-emitter junction (in volts)  

+

+//Calculation

+

+VL = VZ - VBE                  //Voltage across load (in volts)

+VCE = VS - VL                  //Collector to emitter voltage (in volts)

+IR = (VS - VZ)/ R              //Current through R (in milli-Ampere)

+IL = VL / RL                   //Load current (in milli-Ampere)

+IB = IL / beta                 //Base current (in milli-Ampere)    

+IZ = IR - IB                   //Current through Zener (in milli-Ampere)

+

+//Result

+

+printf("\n Load voltage is  %0.3f  V.",VL)

+printf("\n Collector to Emitter voltage is  %0.3f  V.",VCE)

+printf("\n Current through R is  %0.2f  mA.",IR)

+printf("\n Load current is  %0.3f  mA.",IL)

+printf("\n Base current is  %0.3f  micro-A.",IB * 10**3)

+printf("\n Current through Zener is  %0.2f  mA.",IZ)

diff --git a/3754/CH20/EX20.17/20_17.sce b/3754/CH20/EX20.17/20_17.sce
new file mode 100644
index 000000000..f32161a16
--- /dev/null
+++ b/3754/CH20/EX20.17/20_17.sce
@@ -0,0 +1,29 @@
+clear//

+

+//Variables

+

+IZmin = 0                     //Minimun Zener current (in Ampere)

+ILmax = 2.0                   //Maximum load current (in Ampere)

+VL = 12.0                     //Voltage across load (in volts)

+VSmin = 15.0                  //Minimum Input voltage (in volts)

+VSmax = 20.0                  //Maximum Input Voltage (in volts)

+beta = 100                    //common emitter current gain

+VBE = 0.5                     //Voltage between base-emitter junction (in volts)

+VZ = 12.5                     //Voltage across zener diode (in volts)

+IZmin = 1.0 * 10**-3          //Current through Zener diode   

+ICmax = ILmax                 //Maximum Collector current (in Ampere) 

+

+//Calculation

+

+IBmax = ICmax / beta          //Maximum collector current

+IR = IBmax + IZmin            //Current through resistance R (in Ampere)

+Rmax = (VSmin - VZ)/ IR       //Maximum value of resistance R (in ohm)

+IZmax = (VSmax - VZ)/ Rmax    //Maximum value of Zener current (in Ampere)

+PZmax = VZ * IZmax            //Maximum power dissipation in Zener Diode (in watt)

+PRmax = (VSmax - VZ) * IZmax  //Maximum power dissipated in Resistance R (in watt)

+VCEmax = VSmax - VL           //Maximum value of collector-to-emitter voltage (in volts)      

+PDmax = VCEmax * ILmax        //Maximum power dissipation of the transistor (in watt)

+

+//Result

+

+printf("\n Maximum value of R is  %0.0f  ohm.\nMaximum power dissipation of the zener diode is  %0.2f  W.\nMaximum power dissipation of resistance R is  %0.2f  W.\nMaximum power dissipation of the transistor is  %0.3f  W.",Rmax,PZmax,PRmax,PDmax)

diff --git a/3754/CH20/EX20.18/20_18.sce b/3754/CH20/EX20.18/20_18.sce
new file mode 100644
index 000000000..57553d9b9
--- /dev/null
+++ b/3754/CH20/EX20.18/20_18.sce
@@ -0,0 +1,33 @@
+clear//

+

+//Variables

+

+VL = 12.0                      //Voltage across load (in volts)

+IL = 200.0                     //Load current (in milli-Ampere)

+VS = 30.0                      //Source voltage (in volts)

+RS = 10.0                      //Series resistance (in ohm)

+beta1=150.0;hfe1=150.0;

+beta2=100.0;hfe2=100.0;

+IC1 = 10.0                     //Collector current (in milli-Ampere)

+VBE1 = 0.7                     //Emitter-to-Base voltage1 (in volts)

+VBE2 = 0.7                     //Emitter-to-Base voltage2 (in volts)

+VZ=6.0;VR=6.0;

+RZ = 10.0                      //Resistance of zener diode (in ohm)

+IZ = 20.0                      //Current through zener diode (in milli-Ampere)

+ID = 10.0 * 10**-3             //Current (in Ampere) 

+I1 = 10.0 * 10**-3             //Current (in Ampere)   

+

+//Calculation

+

+RD = (VL - VZ) / ID            //Resistance (in ohm)

+V2 = VZ + VBE2                 //Voltage (in volts)

+R1 = (VL - V2)/I1              //Value of resistance R1 (in ohm)

+R2 = R1 * (V2 / (VL - V2))     //Value of resistance R2 (in ohm)

+IB1 = (IL + I1 + ID) / beta1   //Base Current IB1 (in Ampere)

+I = IB1 + IC1                  //Current through resistance R3 (in Ampere)

+R3 = (VS - (VBE1 + VL))/I      //Value of resistance (in ohm)  

+

+//Result

+

+printf("\n Value of Resistance RD is  %0.3f  ohm.\nValue of Resistance R1 and R2 is  %0.3f  ohm and  %0.3f  ohm.",RD,R1,R2)

+printf("\n Value of Resistance R3 is  %0.1f  kilo-ohm.",R3)

diff --git a/3754/CH20/EX20.19/20_19.sce b/3754/CH20/EX20.19/20_19.sce
new file mode 100644
index 000000000..89df37474
--- /dev/null
+++ b/3754/CH20/EX20.19/20_19.sce
@@ -0,0 +1,20 @@
+clear//

+

+//Variables

+

+VS = 25.0                  //Source voltage (in volts)

+VZ = 15.0                  //Zener voltage (in volts)

+RL = 1.0                   //Load resistance (in kilo-ohm)

+VBE = 0.7                  //Emitter-to-Base voltage (in volts)  

+

+//Calculation

+

+Vout = VZ/2 + VBE          //Output voltage (in volts)

+IL = Vout / RL             //Load current (in milli-Ampere)

+IE1 = IL                   //Current (in milli-Ampere)

+VCE1 = VS - Vout           //Collector-To-Emitter voltage (in volts)

+P1 = VCE1 * IE1            //Power dissipated (in watt)

+

+//Result

+

+printf("\n Vout is  %0.3f  V.\nIL is  %0.3f  mA.\nIE1 is  %0.3f  mA.\nP1 is  %0.3f  W.",Vout,IL,IE1,P1)

diff --git a/3754/CH20/EX20.2/20_2.sce b/3754/CH20/EX20.2/20_2.sce
new file mode 100644
index 000000000..b56ca7bc7
--- /dev/null
+++ b/3754/CH20/EX20.2/20_2.sce
@@ -0,0 +1,14 @@
+clear//

+

+//Variables

+

+LR = 1.4                       //Line regulation (in micro-volt per volt)               

+dVS = 10                       //Change in source voltage (in volts)

+

+//Calculation

+

+dVL = LR * dVS                 //Change in output voltage (in micro-volts)

+

+//Result

+

+printf("\n The change in output voltage is  %0.3f  micro-volt.",dVL)

diff --git a/3754/CH20/EX20.21/20_21.sce b/3754/CH20/EX20.21/20_21.sce
new file mode 100644
index 000000000..0d1e36397
--- /dev/null
+++ b/3754/CH20/EX20.21/20_21.sce
@@ -0,0 +1,15 @@
+clear//

+

+//Variables

+

+R1 = 220.0               //Resistance1 (in ohm)

+R2 = 1.5 * 10**3         //Resistance2 (in ohm)

+VREF = 1.25              //Reference voltage (in volts)

+

+//Calculation

+

+Vo = VREF * (R2/R1 + 1)  //Regulated dc output voltage (in volts)

+

+//Result

+

+printf("\n Regulated dc output voltage is  %0.2f  V.",Vo)

diff --git a/3754/CH20/EX20.22/20_22.sce b/3754/CH20/EX20.22/20_22.sce
new file mode 100644
index 000000000..6af248c23
--- /dev/null
+++ b/3754/CH20/EX20.22/20_22.sce
@@ -0,0 +1,15 @@
+clear//

+

+//Variables

+

+R1 = 240.0               //Resistance1 (in ohm)

+R2 = 2.4 * 10**3         //Resistance2 (in ohm)

+VREF = 1.25              //Reference voltage (in volts)

+

+//Calculation

+

+Vo = VREF * (R2/R1 + 1)  //Regulated dc output voltage (in volts)

+

+//Result

+

+printf("\n Regulated dc output voltage is  %0.3f  V.",Vo)

diff --git a/3754/CH20/EX20.3/20_3.sce b/3754/CH20/EX20.3/20_3.sce
new file mode 100644
index 000000000..9b78a88aa
--- /dev/null
+++ b/3754/CH20/EX20.3/20_3.sce
@@ -0,0 +1,15 @@
+clear//

+

+//Variables

+

+dIL = 40.0                    //Change in current (in milli-Ampere)

+VNL = 8.0                     //Voltage under no load (in volts)

+VFL = 7.995                   //Voltage under full load (in volts)

+

+//Calculation

+

+LR = (VNL - VFL)/ dIL         //Line regulation (in milli-volt per milli-Ampere)   

+

+//Result

+

+printf("\n Line regulation is  %0.3f mV/mA.",LR * 10**3)

diff --git a/3754/CH20/EX20.4/20_4.sce b/3754/CH20/EX20.4/20_4.sce
new file mode 100644
index 000000000..0d5c7664d
--- /dev/null
+++ b/3754/CH20/EX20.4/20_4.sce
@@ -0,0 +1,15 @@
+clear//

+

+//Variables

+

+LR = 10.0                              //Load regulation (in micro-volt per milli-Ampere)

+VNL = 5.0                              //No load Voltage (in volts)

+dIL = 20.0                             //Change in current (in milli-Ampere)

+

+//Calculation

+

+VFL = VNL - LR * dIL * 10**-6          //Full load Voltage (in volts) 

+

+//Result

+

+printf("\n Full load Voltage is  %0.3f  V.",VFL)

diff --git a/3754/CH20/EX20.5/20_5.sce b/3754/CH20/EX20.5/20_5.sce
new file mode 100644
index 000000000..58ed1b3fc
--- /dev/null
+++ b/3754/CH20/EX20.5/20_5.sce
@@ -0,0 +1,14 @@
+clear//

+

+//Variables

+

+V0 = 10                      //Regulated dc supply (in volts)

+LR = 0.00002                 //Line regulation 

+

+//Calculation

+

+dV = LR * V0                 //Change in output voltage (in volts)

+

+//Result

+

+printf("\n Change in output voltage is  %0.3f  mV.",dV * 10**3)

diff --git a/3754/CH20/EX20.6/20_6.sce b/3754/CH20/EX20.6/20_6.sce
new file mode 100644
index 000000000..aa9855375
--- /dev/null
+++ b/3754/CH20/EX20.6/20_6.sce
@@ -0,0 +1,20 @@
+clear//

+

+//Variables

+

+VS = 30.0                   //Source voltage (in volts)

+RS = 240.0                  //Series resistance (in ohm)

+Vz = 12.0                   //Zener voltage (in volts)

+RL = 500.0                  //Load resistance (in ohm)

+

+//Calculation

+

+VL = Vz                     //Voltage drop across load (in volts)

+IS = (VS - Vz) / RS         //Current through RS (in Ampere)

+VRS = IS * RS               //Voltage drop across series resistance (in volts)

+IL = VL / RL                //Load current (in Ampere)

+IZ = IS - IL                //Zener current (in Ampere)

+

+//Result

+

+printf("\n Load voltage is  %0.3f  V.\nVoltage drop across series resistance is  %0.3f  V.\nCurrent through Zener diode is  %0.3f  A.",VL,VRS,IZ)

diff --git a/3754/CH20/EX20.8/20_8.sce b/3754/CH20/EX20.8/20_8.sce
new file mode 100644
index 000000000..1e6007035
--- /dev/null
+++ b/3754/CH20/EX20.8/20_8.sce
@@ -0,0 +1,20 @@
+clear//

+

+//Variables

+

+VS = 24.0                        //Source voltage (in volts)

+RS = 500.0                       //Series resistance (in ohm)

+VZ = 12.0                        //Zener Voltage (in volts)

+IZmin = 3.0                      //Minimum Zener current (in milli-Ampere)

+IZmax = 90.0                     //Maximum Zener current (in milli-Ampere)

+rZ = 0.0                         //Zener resistance (in ohm)

+

+//Calculation

+

+IS = (VS - VZ) / RS              //Current through RS (in Ampere)

+ILmax = IS - IZmin * 10**-3      //Maximum value of load Current (in Ampere) 

+RLmin = VZ / ILmax               //Minimum value of Load resistance (in ohm) 

+

+//Result

+

+printf("\n Minimum value of load resistance is  %0.0f  ohm.",RLmin)

diff --git a/3754/CH20/EX20.9/20_9.sce b/3754/CH20/EX20.9/20_9.sce
new file mode 100644
index 000000000..59b7f2a24
--- /dev/null
+++ b/3754/CH20/EX20.9/20_9.sce
@@ -0,0 +1,19 @@
+clear//

+

+//Variables

+

+VZ = 10.0                                   //Zener voltage (in volts)

+RS = 1.0                                    //Series Resistance (in kilo-ohm)   

+RL = 2.0                                    //Load Resistance (in kilo-ohm)

+VSmin = 22.0                                //Minimum source voltage (in volts) 

+VSmax = 40                                  //Maximum source voltage (in volts) 

+

+//Calculation

+

+IL = VZ / RL                                //Load current (in milli-Ampere)

+IZmax = (VSmax - VZ) / RS - IL              //Maximum value of zener current (in milli-Ampere)

+IZmin = (VSmin - VZ) / RS - IL              //Minimum value of zener current (in milli-Ampere)

+

+//Result

+

+printf("\n Maximum value of zener current is  %0.3f  mA.\nMinimum value of zener current is  %0.3f  mA.",IZmax,IZmin)