initial commit / add all books

1 files changed, 59 insertions, 0 deletions

diff --git a/1514/CH12/EX12.3/12_3.sce b/1514/CH12/EX12.3/12_3.sce
new file mode 100755
index 000000000..9ae922c00
--- /dev/null
+++ b/1514/CH12/EX12.3/12_3.sce
@@ -0,0 +1,59 @@
+//chapter 12

+//example 12.3

+//page 371

+clear all;

+clc ;

+//given

+Vcc=20;//supply voltage

+Rl=500;//load resistance

+Av=75;//closed loop voltage gain

+f1=30;// i/p signal frquency Hz

+hfe=80;

+hie=1.4;

+Ve=5;Vce=3;

+VR2=5.7;

+Vbe=5;

+VR3=Vcc-Vce-Ve;

+R3=Rl/10;

+Ic=VR3/R3*10^3;

+printf("\ncollector current = %d microA,\ntoo small for operations of transistor,\nSo Ic=1 mA",Ic)

+Ic=1;

+R3=VR3/Ic;

+printf('\nR3=%d kohm which is standard value',R3)

+R45=(Ve/Ic);

+R4=1000*((R3*Rl)/(R3+Rl))/Av;

+printf("\nR4=%d ohm ,use standard value 150 ohm",R4);R4=150;

+R5=R45-R4/1000;

+printf("\nR5=%.2f kohm ,use standard value 5.6 kohm",R5);

+R5=5.6;//kohm

+//potential divider current and resistors

+I2=Ic/10;

+Ve=0.7;

+R2=(Vbe+Ve)/I2;

+printf("\nR2=%d kohm,use standard value 56 kohm",R2);R2=56;

+R1=(Vcc-VR2)/I2;

+printf("\nR1=%d kohm,use standard value 150 kohm",R1);R1=150;

+Zb=hie+(1+hfe)*R4/1000;

+//input impedance

+Zi=1/((1/Zb)+(1/R1)+(1/R2));

+printf("\ninput impedance=%.2f kohm",(Zi));

+//capacitance

+XC1=Zi/10;

+XC1=1;

+C1=10^3/(2*%pi *f1*XC1);

+printf("\ncapacitor C1=%.1f microF,use standard value 5.6 microF",(C1))

+XC2=R4;

+C2=10^6/(2 * %pi *f1* XC2);

+printf("\ncapacitor C2=%.1f microF,use standard value 39 microF",C2)

+C3=10^3/(2*%pi *f1*Rl/10);

+printf("\ncapacitor C3=%.3f microF,use standard value 0.1 microF",C3)

+

+

+

+

+

+

+

+

+

+