ATT test 6 Comprehensive
Questions (Frequently Most
Tested) with Verified Answers
What is the purpose of a sine wave oscillator? - Answer: Convert DC Energy to sinusoidal AC Energy.
What is the purpose of a Hartley Oscillator? - Answer: Convert DC Energy to sinusoidal AC Energy.
What is the purpose of a colpitts oscillator? - Answer: Convert DC Energy to sinusoidal AC Energy.
What is the purpose of a RC phase shift oscillator? - Answer: Convert DC Energy to sinusoidal AC Energy.
What is the purpose of a crystal oscillator? - Answer: Convert DC Energy to sinusoidal AC energy.
What is the purpose of a sawtooth generator? - Answer: Convert square wave energy to a sawtooth
waveform.
The FET is a ___________. - Answer: Unipolar Device
The element that current carries enter the FET through is called? - Answer: Source
The element that current carriers leave through is called? - Answer: Drain
The flow of current carriers through the FET is controlled by this element. - Answer: Gate
What is the most common fault in a FET amplifier? - Answer: A failed semiconductor component.
What is it called when current flow remains constant? - Answer: Saturation
, What are the 4 steps to troubleshoot an amplifier? - Answer: (1.) Determine amplifier operation
(2.) Determine if Vcc is present
(3.) Determine if FET is good
(4.) Isolate problem to bias circuit
How is a Hartley Oscillator identified? - Answer: They have two inductors in the feedback circuit.
How is frequency determined in a Hartley Oscillators? - Answer: The values of the components in the
feedback circuit determine the frequency.
How is a colpitts oscillator identified? - Answer: Two capacitors in the feedback circuit.
How is frequency determined in a colpitts oscillator? - Answer: Frequency is determined by the
components in the feedback circuit.
How is an RC Phase Shift oscillator identified? - Answer: They have three RC networks in the feedback
circuit.
What is the total phase shift in an RC Phase shift oscillator? - Answer: 360 degrees.
Q1 is a common emitter amplifier that produces a 180 degree phase shift. Each RC network produces a
phase shift as well.
How is frequency determined with the sawtooth oscillator? - Answer: The frequency of the output is
determined by the frequency of the input.
What is the purpose of a blocking oscillator? - Answer: They change DC into short, rectangular pulses
that can be used as timing pulses to trigger other circuits.
Blocking Oscillator - Answer: Any oscillator that cuts off its own oscillations at a predetermined time.
Questions (Frequently Most
Tested) with Verified Answers
What is the purpose of a sine wave oscillator? - Answer: Convert DC Energy to sinusoidal AC Energy.
What is the purpose of a Hartley Oscillator? - Answer: Convert DC Energy to sinusoidal AC Energy.
What is the purpose of a colpitts oscillator? - Answer: Convert DC Energy to sinusoidal AC Energy.
What is the purpose of a RC phase shift oscillator? - Answer: Convert DC Energy to sinusoidal AC Energy.
What is the purpose of a crystal oscillator? - Answer: Convert DC Energy to sinusoidal AC energy.
What is the purpose of a sawtooth generator? - Answer: Convert square wave energy to a sawtooth
waveform.
The FET is a ___________. - Answer: Unipolar Device
The element that current carries enter the FET through is called? - Answer: Source
The element that current carriers leave through is called? - Answer: Drain
The flow of current carriers through the FET is controlled by this element. - Answer: Gate
What is the most common fault in a FET amplifier? - Answer: A failed semiconductor component.
What is it called when current flow remains constant? - Answer: Saturation
, What are the 4 steps to troubleshoot an amplifier? - Answer: (1.) Determine amplifier operation
(2.) Determine if Vcc is present
(3.) Determine if FET is good
(4.) Isolate problem to bias circuit
How is a Hartley Oscillator identified? - Answer: They have two inductors in the feedback circuit.
How is frequency determined in a Hartley Oscillators? - Answer: The values of the components in the
feedback circuit determine the frequency.
How is a colpitts oscillator identified? - Answer: Two capacitors in the feedback circuit.
How is frequency determined in a colpitts oscillator? - Answer: Frequency is determined by the
components in the feedback circuit.
How is an RC Phase Shift oscillator identified? - Answer: They have three RC networks in the feedback
circuit.
What is the total phase shift in an RC Phase shift oscillator? - Answer: 360 degrees.
Q1 is a common emitter amplifier that produces a 180 degree phase shift. Each RC network produces a
phase shift as well.
How is frequency determined with the sawtooth oscillator? - Answer: The frequency of the output is
determined by the frequency of the input.
What is the purpose of a blocking oscillator? - Answer: They change DC into short, rectangular pulses
that can be used as timing pulses to trigger other circuits.
Blocking Oscillator - Answer: Any oscillator that cuts off its own oscillations at a predetermined time.
