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diff --git a/226/CH12/EX12.22/example22_sce.sce b/226/CH12/EX12.22/example22_sce.sce
new file mode 100755
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+//chapter 12
+//example 12.22
+//page 525
+printf("\n")
+printf("given")
+hie=1*10^3;hfe=50;hoe=10*10^-6;Cc=5*10^-12;Cp=330*10^-12;Lp=75*10^-6;Rw=1;Rl=5*10^3;hfb=50;fo=1*10^6;
+fo=1/(2*3.14*sqrt(Lp*(Cp+Cc)))
+printf("resonance frequency is %3fHz\n",fo)
+Zp=Lp/((Cp+Cc)*Rw)
+Rc=1/hoe
+RL=(Zp*Rc*Rl)/(Rl*Rc+Rc*Zp+Rl*Zp);
+RL=4.7*10^3;//as standard value
+Av=(hfb*RL)/hie;
+printf(" voltage gain is %d\n",Av)
+Qp=((Rc*Rl)/(Rc+Rl))/(2*3.14*fo*Lp)
+QL=(2*3.14*fo*Lp)/Rw
+disp("since QL>Qp")
+B=fo/Qp;
+printf("bandwidth is %dHz\n",B)