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ATT Test 6: Questions With Complete Solutions (A+)
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ATT Test 6: Questions With Complete Solutions (A+)
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ATT Test 6: Questions With Complete Solutions (A+)What is the purpose of a sine wave oscillator? Right Ans - Convert DC
Energy to sinusoidal AC Energy.
What is the purpose of a Hartley Oscillator? Right Ans - Convert DC Energy
to sinusoidal AC Energy.
What is the purpose of a colpitts oscillator? Right Ans - Convert DC Energy
to sinusoidal AC Energy.
What is the purpose of a RC phase shift oscillator? Right Ans - Convert DC
Energy to sinusoidal AC Energy.
What is the purpose of a crystal oscillator? Right Ans - Convert DC Energy
to sinusoidal AC energy.
What is the purpose of a sawtooth generator? Right Ans - Convert square
wave energy to a sawtooth waveform.
The FET is a ___________. Right Ans - Unipolar Device
The element that current carries enter the FET through is called? Right Ans
- Source
The element that current carriers leave through is called? Right Ans - Drain
The flow of current carriers through the FET is controlled by this element.
Right Ans - Gate
What is the most common fault in a FET amplifier? Right Ans - A failed
semiconductor component.
What is it called when current flow remains constant? Right Ans -
Saturation
What are the 4 steps to troubleshoot an amplifier? Right Ans - (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? Right Ans - They have two inductors
in the feedback circuit.
How is frequency determined in a Hartley Oscillators? Right Ans - The
values of the components in the feedback circuit determine the frequency.
How is a colpitts oscillator identified? Right Ans - Two capacitors in the
feedback circuit.
How is frequency determined in a colpitts oscillator? Right Ans - Frequency
is determined by the components in the feedback circuit.
How is an RC Phase Shift oscillator identified? Right Ans - They have three
RC networks in the feedback circuit.
What is the total phase shift in an RC Phase shift oscillator? Right Ans - 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? Right Ans - The
frequency of the output is determined by the frequency of the input.
What is the purpose of a blocking oscillator? Right Ans - They change DC
into short, rectangular pulses that can be used as timing pulses to trigger
other circuits.
Blocking Oscillator Right Ans - Any oscillator that cuts off its own
oscillations at a predetermined time.
Transconductance (gm) Right Ans - The amount of control that the input
voltage has over the output current.
Gm= Ioutput/Einput
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