Question
Download Solution PDFDarlington pair is used for:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 2.
Darlington Transistor
The Darlington Transistor is a special arrangement of two standard NPN or PNP bipolar junction transistors (BJT) connected together.
The Emitter of one transistor is connected to the base of the other to produce a more sensitive transistor with a much larger current gain being useful in applications where current amplification or switching is required.
The ratio of collector current to base current (β) is known as the current gain of the transistor. A typical value of β for a standard bipolar transistor may be in the range of 50 to 200 and varies even between transistors of the same part number.
In some cases where the current gain of a single transistor is too low to directly drive a load, one way to increase the gain is to use a Darlington pair.
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