Questions
21
In Colpitt’s oscillator, feedback is obtained …………….
Answer: From the centre of split capacitors
23
An important limitation of a crystal oscillator is ……………
Answer: Its low output
25
Which type of oscillators are used in timing elements?
Answer: Crystal oscillator
26
Which of the following oscillator is will give most stable output oscillation frequency?
Answer: Crystal oscillator
27
A second condition for oscillations is ……………….
Answer: A gain of 1 around the feedback loop
28
In a certain oscillator Av = 50. The attention of the feedback circuit must be …………
Answer: 02
29
The crystal oscillator frequency is very stable due to ………………. of the crystal
Answer: High Q
30
A Wien bridge oscillator uses ……………. feedback
Answer: Both positive and negative
31
If the crystal frequency changes with temperature, we say that crystal has ………….. temperature coefficient
Answer: Positive
32
An oscillator differs from an amplifier because it ………
Answer: Requires no input signal
33
In an LC transistor oscillator, the active device is ……………
Answer: Transistor
34
In an LC circuit, when the capacitor is maximum, the inductor energy is ……….
Answer: Minimum
