I've been reading some articles and transistor inner workings as my electronics course is pure math and I don't understand anything without atomic level explanation.
I found this nifty article on common-emitter amplifier from here and was curious about a line in it:
I'm kind of confused here, but the second article has a solid argument. Can anybody help me/correct something?
I found this nifty article on common-emitter amplifier from here and was curious about a line in it:
Really? Another article says exactly the opposite:Remember that bipolar transistors are current-controlled devices: they regulate collector current based on the existence of base-to-emitter current, not base-to-emitter voltage.
(From: http://amasci.com/amateur/transis.html)Whenever voltage is applied between base and emitter, this insulating layer changes thickness. If (+)voltage is applied to the p-type (to the base wire,) while a (-) voltage polarity is applied to the n-type, (to the emitter wire,) then electrons in the n-type are pushed towards the holes in the p-type. The insulating layer becomes so thin that the clouds of electrons and holes start meeting and combining. A current therefore exists in the base/emitter circuit. But this current is not important to transistor action. What's important to notice is that the *VOLTAGE* across the base/emitter has caused the insulating Depletion Layer to become so thin that the charges can now flow across it.
I'm kind of confused here, but the second article has a solid argument. Can anybody help me/correct something?