What is emitter follower used for?
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.
Why is it called emitter follower?
Concept: The Emitter-follower circuit is also known as a common collector configuration. It is called the emitter follower configuration because the emitter voltage follows the base voltage. It is therefore widely used as a buffer between two stages of a multi-stage amplification circuit.
What is emitter follower circuit and write its applications?
The emitter follower has the following principal applications : (i) To provide current amplification with no voltage gain. (ii) Impedance matching. The emitter follower has the following principal applications : (i) To provide current amplification with no voltage gain.
What do you mean by emitter?
Definition of ’emitter’ 1. a person or thing that emits. 2. a radioactive substance that emits radiation. a beta emitter.
What is an emitter in a transistor?
The emitter “emits” electrons into the base, which controls the number of electrons the emitter emits. Most of the electrons emitted are “collected” by the collector, which sends them along to the next part of the circuit.
Which is also known as emitter follower?
In electronics, a common collector amplifier (also known as an emitter follower) is one of three basic single-stage bipolar junction transistor (BJT) amplifier topologies, typically used as a voltage buffer.
What is called emitter follower?
Why are emitters called emitters?
When an AC signal is applied to the transistor amplifier it causes the base voltage VB to fluctuate in value at the AC signal. It is also named common-emitter amplifier because the emitter of the transistor is common to both the input circuit and output circuit.
What does emitted mean in science?
Emit means to release or discharge something, such as gas, liquid, heat, sound, light, or radiation. The process of emitting is called emission.
What is emitter in chemistry?
Emitter may refer to: Devices which emit charged particles: Cathode, or negative electrode, in a vacuum tube or diode. Anode, or positive electrode, in certain applications based on the emission of ions from a solid surface.
Why is a common collector amplifier is called emitter follower?
The other name for the common collector is emitter follower. 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.
What are the applications of an emitter follower?
The emitter follower has the following principal applications : (i) To provide current amplification with no voltage gain. (ii) Impedance matching. The emitter follower has the following principal applications : (i) To provide current amplification with no voltage gain.
What is the advantage of emitter follower?
It has high input impedance
Why is common collector called emitter follower?
The common collector amplifier, often called an emitter follower since its output is taken from the emitter resistor, is useful as an impedance matching device since its input impedance is much higher than its output impedance. It is also termed a “buffer” for this reason and is used in digital circuits with basic gates.