Which transistor will possess a higher bandwidth?

Q.  Which among the following will possess a higher bandwidth, if two transistors are provided with unity gain frequency?
- Published on 23 Sep 15

a. Transistor with lower hfe
b. Transistor with higher hfe
c. Transistor with lower hre
d. Transistor with higher hre

ANSWER: Transistor with lower hfe

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    Discussion

  • Satyawati   -Posted on 30 Sep 15
    Generally, the short circuit CE gain of a transistor gets reduced to unity at f = fT.. This implies that the transistor loses its capability of current amplification at f = fT.

    As the gain-bandwidth product always remains constant,the transistor with lower hfe will definitely possesses higher bandwidth if the two transistors are made available with equal unity gain frequency.

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