Why is a CC amplifier circuit not preferred for voltage amplification?

Question

And why are the other two configurations better for voltage amplification.

Answer 1

A common collector amplifier is also known as a voltage follower. It has a voltage gain (ideally) of 1:1 (in reality about 0.98:1 or 0.99:1). There is no "amplification" of voltage.

CC voltage followers are used for matching higher inpedance inputs to much lower impedance outputs. They drive higher current into those lower impedance loads, while keeping the input voltage 'constant'.

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