Recent content by Suwandy

WHOOPS! what a mistake :)) sorry for being amateur. When doing KVL with lot of resistors i don't have any problem but, when it comes to applying KVL/KCL with a real circuit, my mind goes blank. . . . Vcc = Ib*Rb + Vbe + Ie*Re 10V = Ib*10KΩ + 0.6V + Ie*100Ω 9.4V = Ib*10KΩ + Ib*(β+1)*100Ω 9.4V =...

Ve = Vcc - Vbe Ve = 10V - 0.6V Ve = 9.4V Ie = Ve / Re Ie = 9.4V / 100Ω Ie = 94mA Ib = Ie / (Hfe+1) Ib = 94mA / (100+1) Ib = 0.93mA Ic = Ib * Hfe Ic = 0.93mA * 100 Ic = 93mA Vc = Ic * Rc Vc = 93mA * 1KΩ Vc = 10V ?? (93V bigger than Vcc) Vce = Vc - Ve Vce = 10V - 9.4V Vce = 0.6V

Thank you so much Jony130 for explaining this in a very clear manner :D This picture is interesting, the Ibq function is same as previous equation explained by Jony130. Does it mean this Ibq function is a common knowledge that can be applied anywhere (w/o feedback)?

This part kinda get me confused. This was my steps on breaking down this function: 1. Vth - Ie/(β +1)*Rth - Vbe = Ie*Re 2. (Vth - Vbe - Ie/(β +1)*Rth) / Re = Ie 3. Vth/Re - Vbe/Re - (Ie/(β +1)*Rth*Re) = Ie 4. (Vth - Vbe)/Re = Ie - Ie/(β +1)*Rth*Re and i stuck at this point. . . . can someone...

That's some nice collection of example pictures you got there :D On the buffer circuit picture, how can we know the value of Vb=4.79V ?? which one got determined first? Ve or Vb??

I prefer calling it current controlled device rather than voltage controlled device, since Vbe will stay the same (0,6V). Meanwhile Ic or Ie will change with regard of change in Ib. Yea, voltage doesn't flows. But, Vce value will never get bigger than Vcc value. Therefore, it "look like" Vce...

Oh! sorry. I didn't see clearly on the picture that Ve=Vb-Vbe. My bad, sorry. Thank you for pointing this out :D Thank you very much for your explanation + pictures. They are very clear and easy to follow, especially the pictures :D. Now i prefer to look BJT transistors as electric current...

Hi Jony130, thank you for sharing your perspective and examples. It was very interesting :D This explanation is clear to me and the example pictures also great at explaining the function of Ib as controller for Ic. On this part, the example pictures showed that Ve keep getting bigger as Ib...

So far the explanation on BJT working principle always explained in electron flow perspective. I felt it's hard to relate with conventional current direction notation when the explanation explained in electron flow direction notation. For example in NPN transistor, the C-E current flow made me...