ISRO Electrical Engineering (EE) 2017 - Question 48

All ISRO Electrical Engineering (EE) papers | ISRO Electrical Engineering (EE) 2017

An all pass network imparts only

  • A. Negative phase to the input
  • B. Positive phase to the input
  • C. +/–90 degree phase shift to the input
  • D. +/–180 degree phase shift to the input

Answer: A. Negative phase to the input

Explanation: An all-pass filter has constant unity gain (|H(jω)| = 1) across all frequencies and introduces pure negative phase lag (delay) to the input signal.

| | All questions of ISRO Electrical Engineering (EE) 2017