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diff --git a/2534/CH8/EX8.6/Ex8_6.sce b/2534/CH8/EX8.6/Ex8_6.sce
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+//Ex8_6
+clc
+hfb = -0.999
+hib = 50
+hob = 0.82*10^-6
+hrb = 4*10^-6
+RL = 22*10^3
+disp("RL = "+string(RL)+"ohm")//load impedence
+//h-parameters for CB transistor amplifier are as follows:
+disp("hib = "+string(hib)+"ohm")//input resistance of CB transistor
+disp("hrb = "+string(hrb))//voltage gain of CB transistor
+disp("hfb = "+string(hfb))//current gain of CB transistor
+disp("hob = "+string(hob)+"mho")//output conductance of CB transistor
+Av = -(hfb*RL)/((RL*(hib*hob-hfb*hrb))+hib)
+disp("Av = -(hfb*RL)/((RL*(hib*hob-hfb*hrb))+hib) = "+string(Av))//voltage gain
+
+
+//note : answer provided in the textbook is not precised.