What is meant by emitter follower?

Emitter follower is a case of negative current feedback circuit. This is mostly used as a last stage amplifier in signal generator circuits. The important features of Emitter Follower are − It has high input impedance. It has low output impedance.

What is the difference between a common collector to an emitter follower amplifier?

The main difference between the two will be where the output is taken. For the common emitter amplifier, we will take the output at the collector of the transistor. For the emitter follower, the output will be taken at the emitter of the transistor.

What is a emitter amplifier?

The common emitter amplifier is a three basic single-stage bipolar junction transistor and is used as a voltage amplifier. The input of this amplifier is taken from the base terminal, the output is collected from the collector terminal and the emitter terminal is common for both the terminals.

What is the function of emitter follower?

Emitter follower is a negative current feedback circuit. Emitter follower configuration, also known as Common collector, provides high input impedance and low output impedance. So they are used for the purpose of impedance matching.

What is the difference between common emitter and common collector?

Common Emitter Configuration – has both Current and Voltage Gain. Common Collector Configuration – has Current Gain but no Voltage Gain.

What type of amplifier is an emitter follower amplifier?

What type of amplifier is an emitter follower amplifier? Explanation: The emitter follower amplifier is one of the most noticeable feedback amplifiers. It provides a negative current feedback to the circuit. These type of amplifiers are usually used in the end stage or the last stage of a series of amplifiers.

What is the use of common collector amplifier?

The common collector or grounded collector configuration is generally used where a high impedance input source needs to be connected to a low impedance output load requiring a high current gain. Consider the common collector amplifier circuit below.

Why common emitter amplifier is widely used?

Common emitter transistors are used most widely, because a common emitter transistor amplifier provides high current gain, high voltage gain and high power gain. This type of transistor gives for a small change in input there is small change in output.

What do you mean by common emitter configuration?

Definition: The configuration in which the emitter is connected between the collector and base is known as a common emitter configuration. Thus, the emitter is common to both the input and the output circuit, and hence the name is the common emitter configuration.

Why common emitter configuration is used for amplification?

⦁ CE is most widely used because it provides the voltage gain required for most of the day to day applications of preamp and power amps. ⦁ Common emitter is the most basic configuration for amplifier circuits. It also provide the maximum transconductance or voltage gain for a given load.

Why is it called common emitter?

It is also named common-emitter amplifier because the emitter of the transistor is common to both the input circuit and output circuit. Since the emitter is connected to the ground, it is common to signals, input and output.

Why are common collector circuits called emitter-follower circuits?

So the output voltage follows the input voltage. so it is called emitter follower. In a common-collector amplifier circuit, the output voltage at the emitter terminal “follows” the applied input signal at the base terminal. Thus, CE amplifier circuits are also called emitter-follower circuits.

What is the difference between CE amplifier and emitter follower circuits?

Thus, CE amplifier circuits are also called emitter-follower circuits. , Ret. Physicist/Engineer, Business Owner, Amateur Astronomer. In an emitter follower the input is applied to the base and the output is taken from the emitter with the collector held at signal ground.

What is the emitter follower configuration used for?

The emitter follower configuration is mostly used as a voltage buffer. These configurations are widely used in impedance matching applications because of their high input impedance. Common collector amplifiers have the following circuit configurations.

What is the circuit configuration of a collector amplifier?

Common collector amplifiers have the following circuit configurations. The input signal enters the transistor at the base terminal. The input signal exits the transistor at the emitter terminal. The collector is connected to a constant voltage, i.e. ground, sometimes with an intervening resistor.