The GATE Grind

GATE Analog and Digital Electronics: Oscillators and feedback amplifiers – Previous Year Questions

2 GATE previous year questions on Oscillators and feedback amplifiers (Analog and Digital Electronics, Electrical Engineering) with answers and explanations, from every paper.

  1. GATE 2014 EE (EE2) Q59 (2 marks, Numerical answer) – The oscillator shown uses ideal op-amp and diodes. Its positive and negative output durations are Δt₁,Δt₂. Find e( t 1- t 2)/(RC).
  2. GATE 2014 EE (EE1) Q32 (1 mark, Multiple choice) – For the Wien-bridge oscillator shown, identify the bridge-balance conditions.