Identify the component shown in the image below:
Darlington pair
The symbolic diagram of the Darlington pair is shown below:
- A Darlington pair is a two-transistor circuit with the emitter of one transistor is connected to the base of other transistors, while both collector terminals are connected to the common terminal
- It has high current gain β; (equal to the product of current gain of individual transistors) and is useful in applications where current amplification or switching is required.
- It also has high input impedance and low output impedance.
- The current gain of a Darlington pair in common emitter configuration is approximate β 2
Important Points
SCR:
DIAC:
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