Darlington configuration - Unsuitable for more than 2 transistors

Q.  Why is the Darlington configuration not suitable for more than two transistors?
- Published on 24 Sep 15

a. Because leakage current increases and voltage gain decreases with multiple number of transistors
b. Because leakage current decreases and voltage gain increases with multiple number of transistors
c. Because leakage current as well as voltage gain increases with multiple number of transistors
d. Because leakage current as well as voltage gain decreases with multiple number of transistors

ANSWER: Because leakage current increases and voltage gain decreases with multiple number of transistors

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    Discussion

  • Satyawati   -Posted on 29 Sep 15
    As the number of transistors increases,the leakage current also increases. The leakage current gets multiplied by the current gain of Darlington configuration.

    Generally,the voltage gain of CC configuration is nearly equal to '1' but the voltage gain of Darlington configuration is very less than '1'.

    Therefore, increase in number of transistors in Darlington configuration will ultimately reduce the voltage gain. However, in order to prevent these possible adverse conditions, Darlington configuration is absolutely unsuitable for more than two transistors.

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