Oscillators » Exercise – 3
101. In the Barkhausen criterion, the loop gain A is equal to ________.
(a)
(b) 200,000
(c) 0
(d) 1
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
103. In the phase-shift oscillator, the operating frequency is determined by ________.
(a) resistance only
(b) capacitance only
(c) LC combinations
(d) RC combinations
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
105. Crystal oscillators are used whenever a(n) ________ level of stability is required.
(a) lower
(b) average
(c) greater
(d) None of the above
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