ISRO Electronics & Communication (ECE) 2023 - Question 44

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Topic: Electronic Devices

Which of the following offers highest speed of operation?

  • A. BJT
  • B. FET
  • C. Enhancement Mode MOSFET
  • D. Depletion mode MOSFET

Answer: A. BJT

Explanation: Historically and fundamentally, Bipolar Junction Transistors (BJTs) typically offer higher transconductance and higher speed of operation (e.g., Emitter-Coupled Logic families) compared to conventional Field-Effect Transistors (FETs) due to minority carrier action and lower internal RC delays in their discrete forms.

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