1 files changed, 53 insertions, 0 deletions
diff --git a/1514/CH20/EX20.5/20_5.sce b/1514/CH20/EX20.5/20_5.sce
new file mode 100755
index 000000000..ab6e481e1
--- /dev/null
+++ b/1514/CH20/EX20.5/20_5.sce
@@ -0,0 +1,53 @@
+//chapter 20
+//example 20.5
+//page 651
+clear;
+clc ;
+//given
+Eb=200;//battery voltage mV
+
+es=0;//signal voltage V
+Rl=80;//load resistance in ohm
+Ed=Eb+es;
+Id=2;//diode current mA
+Er=(Eb+es);
+Il1=Er/Rl;//load current mA
+Ib1=Id+Il1;//battery current mA
+
+es=100;//mV
+Ed=Eb+es;
+Id=1;
+Il2=Ed/Rl;
+Ib2=Id+Il2;
+deitaIl=Il2-Il1;//change in Il
+deltaIb=Ib2-Ib1;//change in Ib
+
+es=-100;//mV
+Ed=Eb+es;
+Id=3;
+Il3=Ed/Rl;
+Ib3=Id+Il3;
+deltaIl= Il3 - Il1;//change in Il
+deltaIb=Ib3-Ib1;//change in Ib
+
+//current gain
+io=deltaIl;
+is=deltaIb;
+Ai=io/is;
+
+//op voltage
+deltaEr=es;
+eo=deltaEr;
+
+//voltage gain
+Av=eo/es;
+
+//power gain
+Ap=Ai*Av;
+
+printf("\ncurrent gain=%d\nvoltage gain=%d\npower gain=%d",Ai,Av,Ap)
+
+
+
+
+