ETO ETO Exam papers 📅 Sep 2025

Exam Question

Under what conditions, can you produce sustained oscillations? Classify oscillations with respect to frequency range, principal involved, etc. It is possible to produce oscillations with RC networks in phase shift oscillator. Discuss in detail. (16)

Reference Answer

Conditions for Sustained Oscillations:
To produce sustained oscillations in a typical tank circuit , the following conditions must be met:
Energy Compensation: The amount of energy supplied must compensate for the losses in the tank circuit and match the energy drawn by the load.
Frequency Match: The applied energy should be of the same frequency as that of the natural oscillations in the tank circuit.

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