Q.Write any one application for CB, CC and CE amplifier.

Each configuration is applied where its own impedance and gain profile fits best — CB for high frequencies, CC for matching, CE for general gain. …

[!TLDR]

CB is used in high-frequency amplifiers, CC as an impedance-matching buffer, and CE for general audio amplification.

Each transistor configuration finds application where its characteristic impedances and gains are an advantage:

1. Common-base (CB) amplifier — its good high-frequency response and low input impedance make it suitable as a radio-frequency (RF) amplifier and as the input stage of a cascode amplifier, where a low-impedance source is to be handled.

2. Common-collector (CC) amplifier / emitter follower — its high input impedance and low output impedance make it ideal for impedance matching, i.e. as a buffer that connects a high-impedance source to a low-impedance load (for example driving a loudspeaker) without loading the source. …