Which type of amplifier inverts signals? (Common Emitter, Commom Collector, Common Base).?

Question

Which amplifier inverts signals, which amplifies both current and voltage, and which amplifies current only?

(Common Emitter) (Common Collector) (Common Base)

Answer 1

Common emitter and common base both invert and provide voltage and current (power) gain. Common collector aka emitter follower provides current gain with no voltage amplification. Common base is used for impedance matching, since the emitter is low impedance and the collector high. Commonly found in rf circuits, and some audio applications.

Answer 2

Common Emitter will invert the signal.
Common Collector will produce only a postive current gain
Commone Base will produce a positive voltage gain only

note that the common emitter amplifies both the current and the gain, in addition to inverting them.

Answer 3

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