For what applications are Darlington pairs typically used?

The Darlington pair is inherently relatively slow because the base current for the output transistor cannot shut off instantly. As a result Darlington pairs are generally used in low frequency applications including in power supplies or areas where a very high input impedance is needed.

What is the advantage of a Darlington pair?

Benefits or advantages of Darlington transistor ➨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.

Why Darlington connection is not preferable for more than two stages?

The Darlington pair has more phase shift at high frequencies than a single transistor and hence can more easily become unstable with negative feedback (i.e., systems that use this configuration can have poor performance due to the extra transistor delay).

What is a feature of Darlington pair of BJT?

This transistor is also called as a Darlington pair, contains of two BJTs that are connected to deliver a high current gain from a low base current. Darlington transistors are classified into different types by Power Dissipation, Max CE Voltage, Polarity, Min DC Current Gain and Type of Packaging.

How does a Sziklai Pair differ from a Darlington pair?

The Sziklai Pair uses transistors of complementary polarity to achieve the same gain as the Darlington Pair, but with improved VBE characteristics. Only Q1’s base-emitter junction is exposed to the outside world. However, the Sziklai pair does not suffer as badly as the Darlington in terms of VBE.

Why Darlington pair is also known as Super Beta transistor?

If the current gain of a transistor is β1 and β2, the overall current gain of Darlington pair is β1β2. The current gain of this transistor is very high compared to the normal transistor. Therefore, this transistor is also known as “Super Beta Transistor”.