What is emitter follower configuration?
Common collector configuration, also known as emitter follower provides high input impedance and low output impedance. So they are used for the purpose of impedance matching. In common collector configuration, the collector terminal is common to both input and output terminals.
What is Darlington emitter follower?
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. A Darlington Transistor configuration, also known as a “Darlington pair” or “super-alpha.
Where is Darlington emitter follower used?
Hence a Darlington emitter follower circuit is sometimes used in the output stage of the TTL gate to increase speed. It has a high current gain β; (equal to the product of the current gain of individual transistors) and is useful in applications where current amplification or switching is required.
Is Darlington amplifier an emitter follower?
Darlington amplifier is an emitter follower.
Why Darlington pair is used?
The Darlington Pair offers a number of advantages. It is primarily used because it offers a particularly high current gain and this also reflects into a high input impedance for the overall Darlington circuit when compared to a single transistor.
What is the main function of Darlington transistor?
A Darlington transistor acts as a single transistor with high current gain, it means that a small amount of current is used from a microcontroller or a sensor to run a larger load.
What is the main function of Darlington Transistor?
What are the advantages of Darlington amplifier?
➨It offers very high current gain in comparison to single transistor. ➨It offers very high input impedance. ➨It uses few components and hence can be used for easy circuit designs. ➨It can amplify signal to larger extent.
What is Darlington pair configuration?
A Darlington Transistor configuration, also known as a “Darlington pair” or “super-alpha circuit”, consist of two NPN or PNP transistors connected together so that the emitter current of the first transistor TR1 becomes the base current of the second transistor TR2.
How a Darlington pair works?
A Darlington Pair acts as one transistor but with a current gain that equals: Total current gain (hFE total) = current gain of transistor 1 (hFE t1) x current gain of transistor 2 (hFE t2) So for example if you had two transistors with a current gain (hFE) = 100: (hFE total) = 100 x 100 (hFE total) = 10,000 You can see …
What is the significance of Darlington connection?
A Darlington transistor (also known as a Darlington pair) is an electronics component made via the combination of two BJTs (Bipolar Junction Transistor) connected in such a way that it allows a very high amount of current gain.