What is its advantage over the emitter follower circuit?
Emitter follower circuit provides high input impedance and low output impedences. The main advantage of using emitter follower configuration is that it provides a voltage gain of unity..Emitter follower circuit are also named as high input impedance circuit..
What is the difference between emitter follower and Darlington pair circuit?
A darlington emitter follower is two transistors operating as one. Both collectors are tied together. The emitter of the first is connected to the base of the second. But the base current, IB2 is equal to transistor TR1 emitter current, IE1 as the emitter of TR1 is connected to the base of TR2.
What is an emitter follower circuit?
An emitter follower circuit is a transistor circuit in which the voltage at the emitter follows the input voltage. The point of an emitter follower circuit is that it can act as a buffer. Since it has a high input impedance and a low output impedance, it mimics the effect of a buffer.
Why is common collector circuit 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.
Is Darlington amplifier is an emitter follower?
Darlington amplifier is an emitter follower. transistor. It also provides a large β as per requirements.
What is Darlington amplifier explain in brief?
In electronics, a multi-transistor configuration called the Darlington configuration (commonly called a Darlington pair) is a circuit consisting of two bipolar transistors with the emitter of one transistor connected to the base of the other, such that the current amplified by the first transistor is amplified further …
What is the difference between common emitter and common collector amplifier?
The most used in common emitter which has current and voltage gain. Common base is mainly used in RF application and has voltage gain and no current gain and has low impedance in and out. Common collector, which is also called emitter follower, has current gain and no voltage gain.
What is the difference between common emitter amplifier and common collector amplifier?
In amplifiers we have to get high power at its output side here high power means high voltage as well as high current we have to get from amplifier. So, in common emitter configuration has both voltage gain as well as current gain but in common collector configuration has only current gain.
Which is incorrect about Darlington amplifier?
Which of these are incorrect about Darlington amplifier? Explanation: A Darlington amplifier has a very high input resistance, low output resistance, unity voltage gain and a high current gain. Explanation: The load for the first transistor in the figure is the input resistance of the second.
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.