# Oscillators – Exercise – 3

Exercise – 3

101. In the Barkhausen criterion, the loop gain A is equal to ________. (a) (b) 200,000 (c) 0 (d) 1

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102. In practice, A is made ________ and the system is started oscillating by amplifying noise voltage, which is always present. (a) greater than 1 (b) smaller than 1 (c) equal to 1 (d) None of the above

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103. In the phase-shift oscillator, the operating frequency is determined by ________. (a) resistance only (b) capacitance only (c) LC combinations (d) RC combinations

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104. In the Colpitts oscillator, the frequency is determined by ________ . (a) resistance only (b) inductance only (c) capacitance only (d) both inductance and a capacitance

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105. Crystal oscillators are used whenever a(n) ________ level of stability is required. (a) lower (b) average (c) greater (d) None of the above