Found a typo in Boylestad's Electronic Devices and Circuit Theory (11th Ed.) Common-Base hybrid model
Hey guys,
So me and my friend are electronics students at Al-Furat Al-Awsat Technical University, Communications Department, and we were going through our textbook when we caught something that had us confused for a while.
We're using Electronic Devices and Circuit Theory by Boylestad (11th Edition), and on page 331, Fig. 101, the dependent current source in the Common-Base hybrid equivalent circuit is labeled as (hfb Ib) which is wrong.
Then literally on the next page, page 332, Fig. 105, the exact same source is correctly labeled as (hfb Ie)
In a Common-Base configuration, the input current is Ie (emitter current), not Ib. You can even confirm this from the re model on the same page where it shows (α Ie )and since (hfb ≈ −α), the dependent source has to depend on Ie, not Ib.
Took us a while to figure out it was just a typo and not us misunderstanding something lol. Posting this in case anyone else is pulling their hair out over the same thing!