What is Emitter follower?
A common-collector amplifier. Its voltage gain is about 1, but its high input impedance and low output impedance make it a buffer that drives the next stage without loading the signal.
Field: Bipolar transistors
Emitter follower in the explanations
In an emitter follower the emitter tracks the base voltage minus VBE (about 0.7 V), so the voltage gain is about 1 and in phase.
Which is a characteristic of a common-collector amplifier (…For even higher input resistance, use an emitter follower, a Darlington, or emitter-resistor feedback.
Which condition increases the small-signal input resistance…It is the counterpart of the emitter follower, but its level shift (VGS) is larger than VBE and varies more.
Which is a characteristic of a MOSFET source follower (comm…
Questions that mention Emitter follower (3)
Related terms
Current gain (hFE) Body effect Common-emitter circuit Crossover distortion Current mirror Cutoff region Darlington connection Early effect Forward-active region HBT (heterojunction bipolar transistor)