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H hydra504 Joined Oct 18, 2007 16 Nov 16, 2007 #2 What is the value for Alpha and VBE? If Alpha = 1 then you can say that IE and IC are equal. With that 25mA, you can find VC just by using KCL. It should be 10V-VC/270 = 25mA VC = ...... From there you can use the other formula VCE= VC - VE If VBE = 0.7V.... ----------------- VB = 5V this is the base volatge it already have a +5V volatage source connected to it. VBE = VB - VE 0.7 = 5V - VE VE = 4.3V ----------------- Attachments untitled.JPG 6.9 KB Views: 27
What is the value for Alpha and VBE? If Alpha = 1 then you can say that IE and IC are equal. With that 25mA, you can find VC just by using KCL. It should be 10V-VC/270 = 25mA VC = ...... From there you can use the other formula VCE= VC - VE If VBE = 0.7V.... ----------------- VB = 5V this is the base volatge it already have a +5V volatage source connected to it. VBE = VB - VE 0.7 = 5V - VE VE = 4.3V -----------------