Oscillators – 1 – 1

1. For generating 1 kHz signal, the most suitable circuit is :

(a) colpitts oscillator
(b) hartley oscillator
(c) tuned collector oscillator
(d) wien bridge oscillator

2. The feedback factor β at the frequency of oscillation of a Wien bridge oscillator is :

(a) 3
(b) 1/3
(c) 1/29
(d) 3/29

3. The use of crystal in a tunable oscillator :

(a) improves frequency stability
(b) increases the gain of the oscillator
(c) helps to obtain optimum output impedance
(d) facilitates generation of wide range of frequencies

4. A phase shift oscillator uses :

(a) LC tuning
(b) piezoelectric crystal
(c) balanced bridge
(d) variable frequency operation

5. A highly stable resonance characteristic is the property of a …….. oscillator.

(a) hartley
(b) colpitts
(c) crystal
(d) wein bridge

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