What are common uses of a common emitter amplifier?

Answer 1

bcause amplification factor beta is usually ranges from 20-500 hence this configuration gives appericiable current gain as well as voltage gain at its output on the other hand in the Common Collector configuration has very high input resistance(~750 kilo ohm) & very low output resistance(~25 ohm) so the voltage gain is always less than one & its most important application is for impedance matching for drivingh from low impedance load to high impedance source

Answer 2

Amplifier, mostly as a switch, does not amplify gain. Gain is a word for describing the amplification factor.

It is voltage or current which is amplified in an electronic circuit. Gain is the factor by which amplification increases the voltage or current.

e.g., if a signal voltage is amplified by 3 times, the gain is 3.

A common emitter amplifier is inverting and has low input impedance, high output impedance, high voltage gain, and high current gain.

Answer 3

It is where an amplifier made with transistors, have the emitters common to the negative rail. (NPN silicon).

No. The common emitter amplifier is so named because the emitter is common to both the input and the output.

i.e. the input is between emitter and base, and the output is between emitter and collector.

Answer 4

A common-collector amplifier, also called an emitter follower, has the collector in both the input circuit and the output circuit.

It is normally used as a buffer, because it has a high input impedance, low output impedance, a voltage gain of 1 but an appreciable power gain.

Emitter followers can become unstable with a capacitve load, which can form an unwanted Colpitts oscillator with the stray capacitances.