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47 Cards in this Set
- Front
- Back
- 3rd side (hint)
The most common fault in a FET circuit is? |
The FET |
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When reverse biased, a low resistance measurement between the gate and source indicates what? |
A shorted source. |
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A depletion mode MOSFET acts like a normally___________ circuit. |
Closed. |
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Obvious physical difference between the construction of Depletion mode and enhancement mode MOSFET circuits is___________. |
The Depletion mode has a diffused channel. |
(Enhancement mode shown) |
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True or False: The MOSFET is similar to a capacitor because the source acts as one plate and the oxide (the dielectric) + the drain act as the other plate. |
False. |
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The purpose of a sine wave oscillator is to convert________________. |
DC energy to sinusoidal AC energy. |
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What type of feedback is required to produce oscillations? |
Regenerative feedback. |
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When noise is applied, the output of the feedback circuit consists of_________. |
One frequency, determined by the feedback circuit. |
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The purpose of a Hartley Oscillator is to convert__________. |
DC energy to sinusoidal AC energy. |
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The purpose of a RC phase shift oscillator is to convert_______. |
DC energy to sinusoidal AC energy. |
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Crystals are made from_________. |
A quartz slab mounted between two metal plates. |
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Crystals used in oscillators exhibit________ effects. |
Piezoelectric |
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RC phase shift and crystal oscillators are difficult to troubleshoot because______________. |
They use a feedback loop. |
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Most faults in an oscillator result in_________. |
No output from the oscillator. |
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What factor solely determines the output frequency of a sawtooth generator? |
Input frequency. |
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A blocking oscillator is one that__________. |
Cuts off its own oscillations at a predetermined time. |
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Which type of oscillator requires an input pulse to produce an output pulse? |
Triggered blocking oscillator. |
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The transistors in a multivibrator are biased so that they are___________. |
Either in cutoff or saturation. |
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In a multivibrator what is meant by a transistor being "on"? |
The transistor is in saturation. |
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Free running multivibrator generate a square wave output__________. |
Anytime the operating voltage is applied. |
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When a transistor in a multivibrator is on, it's output voltage is_______. |
Low. |
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The purpose of an A-stable multivibrator is to_________. |
Convert DC energy to square wave energy. |
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A monostable multivibrator has_________ stable state(s). |
1. |
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The frequency of a monostable multivibrator is determined by__________. |
The input trigger frequency. |
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Bistable multivibrators have_________ stable states. |
2. |
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The frequency of a bistable multivibrator is determined by_____________. |
The input trigger frequency. |
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Most faults in multivibrators result in____________. |
Either no output or a VCC level on the output. |
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In an A-stable multivibrator, what determines which transistor turns on when power is first applied? |
The transistor that conducts first. |
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What type of operation does a monostable multivibrator use? |
Triggered. |
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The purpose of a Schmitt trigger is to_____________. |
Convert any input to constant amplitude pulses. |
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The upper threshold level of a Schmitt trigger is determined by the_________. |
Circuit design. |
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A Schmitt trigger produces a high output only when_________. |
The upper threshold level is exceeded. |
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Schmitt triggers are also called________. |
Squaring amplifiers. |
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Schmitt triggers produce an output pulse any time the input_____________. |
Exceeds the input threshold level. |
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The purpose of an AM receiver is to____________. |
Receive radio waves. |
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The frequency range of AM receivers is__________. |
535 to 1605 kHz. (Note: KHz, not Hz. Both options are provided on test) |
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The term AM stands for_________. |
Amplitude Modulation. |
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The purpose of amplitude Modulation (AM) is to_____________. |
Transmit intelligence over long distances. |
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Information in the form of music, voice, data, or video is called__________. |
Intelligence. |
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If receiver is tuned to 1500 KHz, local oscillator frequency should be_____________. |
1955 KHz. |
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When identifying a faulty function, what location should be the first measurement taken? |
The mid point between all functional blocks of the circuit. |
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Sound waves cannot travel through a__________. |
Vacuum. |
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The fundamental or first harmonic is the________ frequency that a string can make. |
Lowest. |
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The normal range of frequencies that a human can hear is__________. |
20 to 20, 000 Hz. |
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The unit of measurement for sound is________. |
Decibels. |
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Which alarm has a continuous tone for the entire time in which the alarm is sounded? |
Chemical. |
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What is the lowest priority alarm? A: General B: Collision C: Chemical D: Flight crash |
C: Chemical. |
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