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diff --git a/226/CH19/EX19.6/example6_sce.sce b/226/CH19/EX19.6/example6_sce.sce
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+++ b/226/CH19/EX19.6/example6_sce.sce
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+//chapter 19
+//example 19.6
+//page 830
+printf("\n")
+printf("given")
+Rl=50;Po=1;hFE=50;Vbe=.7;Vrc=4;Vre=1;Vd1=.7;Vd2=Vd1;
+Vp=sqrt(2*Rl*Po)
+Ip=Vp/Rl
+Re3=.1*Rl;
+Re2=4.7;//use stabdard value
+Re2=Re3;
+Icq=.1*Ip
+Vb=Vbe+Icq*(Re2+Re3)+Vbe
+Vc1=Vrc;
+Ib2=Ip/hFE
+Irc=Ib2+1*10^-3
+Rc=Vrc/Irc
+Rc=680;//use standard value
+Vcc=2*(Vp+Vre+Vbe+Vrc)
+Vcc=32;//use standard value
+Vrcdc=.5*(Vcc-Vb)
+Ic1=Vrcdc/Rc
+Rb=(Vb-Vd1-Vd2)/Ic1
+\ No newline at end of file