Bipolar Junction Transistors (BJT)

Q1: The three bipolar transistor circuit configurations are common-base, common-emitter, and emitter-follower.

A True

B False

ANS:A - True

The transistor continuously monitors Vdiff and adjusts its emitter voltage almost equal (less VBEO) to the input voltage by passing the according collector current through the emitter resistor RE.

As a result, the output voltage follows the input voltage variations from VBEO up to V+; hence the name, emitter follower.



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