Which of the following conditions is known as the Barkhausen criterion for oscillation? A) The loop gain Aβ must be at least 1 and total phase shift must be 90° B) The loop gain Aβ must be at least 1 and total phase shift must be equal to 0° or 360° C) The loop gain Aβ must be less than 1 and total phase shift must be 180° D) The loop gain Aβ must be exactly 0

B) The loop gain Aβ must be at least 1 and total phase shift must be equal to 0° or 360°

Fill in the blank: A ______ oscillator uses an RC timing circuit to generate a waveform that is generally a square wave or other non-sinusoidal waveform.

Relaxation

True or False: The Wien bridge oscillator is not suitable for audio frequency applications.

False. The Wien bridge oscillator is commonly used for audio frequency applications due to its simplicity and stability.

What is the frequency of oscillation for a phase-shift oscillator using a transistor given that the condition for sustaining oscillation is K = RC/R?

The frequency of oscillation is given by the relationship f0, where K = RC/R.

Riddle: I contain two inductors and a parallel capacitor, and my frequency relies on the sum of my inductors. What am I?

Hartley oscillator

What is the primary purpose of the feedback circuit in a feedback oscillator?

To return a fraction of the output signal to the input with no net phase shift, reinforcing the output signal.

Fill in the blank: The frequency of oscillation for the Colpitts oscillator is determined by the values of ______ and the total capacitance in the feedback loop.

C1, C2, and L

True or False: The frequency of oscillation in a Clapp oscillator is dependent on the values of C1 and C2.

False. In a Clapp oscillator, the frequency of oscillation becomes independent of C1 and C2 if C3 is much smaller than them.

What role does a piezoelectric crystal play in a crystal-controlled oscillator?

It controls the frequency of oscillation by providing maximum feedback at its natural resonant frequency.

Riddle: I am an oscillator type that uses an integrator to produce a triangular wave, changing states as a switch toggles. What am I?

Triangular-wave oscillator