ISRO Electronics & Communication (ECE) 2017 - Question 43

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Topic: Electronic Devices

Which of the noise types is dominant in Metal Semiconductor Field Effect Transistor (MESFET) when compared to Bipolar Junction Transistor (BJT)?

  • A. Thermal Noise
  • B. Shot Noise
  • C. Flicker Noise
  • D. All of the above

Answer: C. Flicker Noise

Explanation: 1/f noise, also known as flicker noise, is much higher in field-effect transistors (like MOSFETs and MESFETs) than in BJTs due to surface traps and generation-recombination centers. Thus, flicker noise is dominant in MESFETs compared to BJTs.

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