Gate EC-2016 – 1 Question Paper With Solutions

Q.25 Consider the oscillator circuit shown in the figure. The function of the network (shown in dotted lines) consisting of the Gate EC-2016 - 1 Question Paper With Solutions resistor in series with the two diodes connected back-to-back is to:

Gate EC-2016 - 1 Question Paper With Solutions
(A) introduce amplitude stabilization by preventing the op-amp from saturating and thus producing sinusoidal oscillations of fixed amplitude

(B) introduce amplitude stabilization by forcing the opamp to swing between positive and negative saturation and thus producing square wave oscillations of fixed amplitude

(C) introduce frequency stabilization by forcing the circuit to oscillate at a single frequency

(D) enable the loop gain to take on a value that produces square wave oscillations

Answer: (A)

Explanation:

Gate EC-2016 - 1 Question Paper With Solutions

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