ATT Test 6 Questions With Correct 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. Transconductance (gm) - Answer The amount of control that the input voltage has over the output current. Gm= Ioutput/Einput Name the 3 multivibrators whose purpose is to convert DC Energy to square wave energy. - Answer 1. Astable Multivibrator 2. Monostable Multivibrator 3. Bistable Multivibrator