ATT TEST 6 EXAM LATEST 2025 ACTUAL EXAM 150
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED
_____ Bias Voltage (VGG) is applied to the _____. - ANSWER>>Negative/Gate
A Negative Bias Voltage (VGG) on the Gate creates a____ in the FET. -
ANSWER>>Barrier
An Increase Negative Gate Voltage (VGG) causes... - ANSWER>>An increase in PN
Junction Barrier
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.
Transconductance (gm) - ANSWER>>The amount of control that the input voltage has
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED
_____ Bias Voltage (VGG) is applied to the _____. - ANSWER>>Negative/Gate
A Negative Bias Voltage (VGG) on the Gate creates a____ in the FET. -
ANSWER>>Barrier
An Increase Negative Gate Voltage (VGG) causes... - ANSWER>>An increase in PN
Junction Barrier
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.
Transconductance (gm) - ANSWER>>The amount of control that the input voltage has
