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GATE ECE 1996 | Question 2.6

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An $\text{npn}$ transistor has a beta cut-off frequency $f \beta$ of $1 \; \mathrm{MHz}$, and common emitter short circuit low frequency current gain $\beta \mathrm{O}$ of $200$. It unity gain frequency $f \mathrm{T}$ and the alpha cut-off frequency $f \alpha$ respectively are

  1. $200 \; \mathrm{MHz}, 201 \; \mathrm{MHz}$
  2. $200 \; \mathrm{MHz}, 199 \; \mathrm{MHz}$
  3. $199 \;\mathrm{MHz}, 200 \; \mathrm{MHz}$
  4. $201 \; \mathrm{MHz}, 200 \; \mathrm{MHz}$

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