Oscillator Concepts Quiz

Resonant frequencies for crystals.

• series resonance

• fixed resonance

• variable resonance

• parallel resonance

What elements are found in the equivalent circuit of a crystal?

• Diode

• Resistor

• Inductor

• Capacitor

The following figure is a _______.

• Hartley oscillator

• Colpitts oscillator

• Crystal oscillator

• Amstrong oscillator

Which of the following is not an essential requirement of the feedback oscillator?

• Phase shift around the feedback loop of 0 degree.

• Positive feedback network.

• Negative feedback network.

• Amplifier circuit

Calculate the frequency.

For an oscillator to properly start up, the loop gain around the feedback network must be:

• 1

• >1

• <10

• 10

An LC Oscillator having two capacitors of 24nF and 270nF respectively are connected in parallel with an inductor of 5mH. determine the oscillation frequency of the circuit.

• 4.15kHz

• 15.16kHz

• 4.15MHz

• 15.16MHz

What is the main function of an LC Oscillator?

• To amplify signals

• To generate oscillations

• To modulate signals

• To demodulate signals

Which type of oscillator uses a piezoelectric crystal to generate stable frequencies?

• Hartley oscillator

• Colpitts oscillator

• Crystal oscillator

• Amstrong oscillator

What is the purpose of the feedback network in an oscillator circuit?

• To provide power supply

• To introduce phase shift

• To control the gain

• To stabilize the oscillations