What is the voltage gain of an emitter follower?

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What is the voltage gain of an emitter follower?

In practice, the voltage gain of an emitter follower is between 0.8 and 0.999.

Which of the following is the main advantage of emitter follower?

Emitter Follower. This is an emitter follower or buffer amplifier circuit, where the output is simply equal to the input minus a diode drop (about 700mV). The advantage of this circuit is that the transistor can provide current and power gain; the transistor draws little current from the input.

What are the practical applications of emitter follower?

Applications of Emitter Follower

• The emitter follower has the following principal applications :
• (i) To provide current amplification with no voltage gain.
• (ii) Impedance matching.
• (i) Current amplification without voltage gain.
• (ii) Impedance matching.

What is the current gain of an emitter follower?

In practice, the voltage gain of an emitter follower is between 0.8 and 0.999. The emitter follower circuit which was just discussed lacks to meet the requirements of the circuit current gain (A i) and the input impedance (Z i ).

How did the emitter follower amplifier get its name?

This name is derived from the fact that the emitter voltage “follows” that of the base circuit – the circuit has unit voltage gain. The emitter follower transistor amplifier has a very straightforward circuit.

Which is the gain of a voltage follower?

A voltage follower is also known as a unity gain amplifier, a voltage buffer, or an isolation amplifier. In a voltage follower circuit, the output voltage is equal to the input voltage; thus, it has a gain of one (unity) and does not amplify the incoming signal.

Why is an emitter follower circuit called a common collector circuit?

Therefore, the voltage at the output is the same as the voltage at the input. The emitter follower circuit is also called a common collector circuit, because the collector is common with the power supply voltage. The point of an emitter follower circuit is that it can act as a buffer.