1 files changed, 19 insertions, 0 deletions
diff --git a/226/CH12/EX12.20/example20_sce.sce b/226/CH12/EX12.20/example20_sce.sce
new file mode 100755
index 000000000..ef19ab8b4
--- /dev/null
+++ b/226/CH12/EX12.20/example20_sce.sce
@@ -0,0 +1,19 @@
+//chapter 12
+//example 12.20
+//page 521
+printf("\n")
+printf("given")
+Vcc=20;Rl=90*10^3;hfe=50;hie=1.2*10^3;hib=24;Vce=3;Vce1=Vce;Ve=5;Vbe=.7;
+Rc=Rl/10//use 8.2kohm as standard value
+Rc=8.2*10^3;
+Vrc=Vcc-Vce-Vce1-Ve
+Ic=Vrc/Rc
+Re=Ve/Ic
+Re=4.7*10^3;//use 4.7 as standard value
+R3=10*Re
+Vb1=Ve+Vbe
+I3=Vb1/R3
+Vb2=Ve+Vce+Vbe
+Vr2=Vb2-Vb1
+R2=Vr2/I3
+R1=(Vcc-Vb2)/I3
+\ No newline at end of file