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AAS 2 > Analog Circuits > Flashcards

Analog Circuits Flashcards

(54 cards)

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1
Q

What formula is used to find the Cutoff-Frequency of a filter?

A

1/(2piRC)

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2
Q

Which of the following terms best describes the measurement of a waveform from any point in one cycle to the same point in the next cycle?

A

Period

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3
Q

Harmonics are useful in electronics for?

A

Frequency Multiplication

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4
Q

There are how many basic types (not categories) of oscillators?

A

3

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5
Q

What is the function of a step counter?

A

Provides an output increase in one step increments for each cycle of input

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6
Q

Which best describes a type of high pass filter?

A

Two parallel inductors with a capacitor in between

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7
Q

True or False? Inductive reactance provides low impedance to AC signals (high frequencies) and high impedance to DC signals (low frequencies)?

A

False

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8
Q

Which analog device is designed to pass or block a specific frequency or frequency bandwidth?

A

Filters

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9
Q

Which variation can affect amplitude stability of an oscillator?

A

Bias variations

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10
Q

Damping can be overcome by providing negative feedback ? (true or false)

A

False

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11
Q

These type of amplifiers have high input impedance and low output impedance and are used to reduce loading effects?

A

Buffer

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12
Q

Is it possible to create an oscillator with only an LC tank circuit?

A

No

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13
Q

When a mechanical stress is applied to certain crystals, electricity or electrical polarity is produced. This is known as what?

A

Piezoelectric Effect

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14
Q

What causes a crystal oscillator to mechanically vibrate?

A

Voltage

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15
Q

Frequency multipliers operate on the pulses of what?

A

Collector Current

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16
Q

The best way to measure the frequency of an oscillating signal is ?

A

Measure T and compute 1/T

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17
Q

Which waveform consists of the fundamental frequency and all of the odd harmonics in phase?

A

Square wave

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18
Q

In a tuning circuit, what allows the resonant frequency (tuned frequency) to pass to the receiving circuitry?

A

Tuning Capacitor

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19
Q

Diminished oscillations with time is a result of ?

A

Damping

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20
Q

Positive feedback is also known as?

A

Regenerative Feedback

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21
Q

Which of the following consists of undesired oscillations, due to imperfect circuits?

A

Ringing

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22
Q

What is the output of a sinusoidal oscillator?

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A

AC waveform with constant amplitude and frequency

23
Q

What is the function of a limiter?

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A

Limits some part of a waveform from exceeding a specified value

24
Q

Commonly, a low-pass filter has a capacitor in parallel with the output and an inductor in series with the output. What is another method of creating a low pass filter?

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A

An inductor in series and a resistor in parallel with the output

25
When a sinewave at a higher harmonic is added to the sinewave's fundamental frequency, the new waveform is referred to as what?
Resultant waveform
26
To maintain oscillations and overcome damping, an oscillator circuit requires what?
Regenerative feedback
27
Which analog device/circuit can be used to change pulsating DC to Pure DC?
Filters
28
Which type of oscillator uses a capacitor and resistor in its design?
RC Oscillators
29
What term identifies the length of a pulse signal?
Pulse Width
30
Which of the following terms best describes the condition where the time it takes a pulse to rise from 10% to 90% of its maximum amplitude?
Rise time
31
Capacitive reactance allows high frequency signals to experience low impedance? (True or False)
True
32
Which type of oscillator uses a tapped or split coil?
Hartley
33
Which of the following can affect amplitude and frequency stability of an oscillator?
Load Variations
34
Which type of oscillator uses a tickler coil?
Armstrong
35
Which best describes a low pass filter?
An inductor in series with a capacitor in parallel
36
The two categories in which an oscillator can be classified according to their output wave are sinusoidal and non-sinusoidal. (True or False)
True
37
Which type of oscillator uses Rochelle salts?
Crystal-controlled oscillators
38
What is produced when pressure is applied to a crystal?
Voltage
39
How do you calculate the Duty Cycle of a square wave?
Pulse width/period
40
When an alternating electrical current is applied to certain crystals, they begin to mechanically vibrate. This is called what?
Inverse piezoelectric effect
41
Which waveform consists of the fundamental frequency and all of the harmonics?
Sawtooth wave
42
What is the function of a clamper?
Restrains either the upper or lower extremity of a waveform to a fixed DC potential
43
In a tank circuit the reactance is tuned to the resistance? (True or False)
False
44
Which oscillator has good frequency stability, easy to tune and can be used for a wide range of frequencies?
Colpitts
45
When a sinewave's fundamental frequency is combined with the 3rd, 7th, & 11th harmonics 180 degrees out of phase, and the 5th, 9th, & 13th harmonics in phase, what type of waveform is created?
Peaked wave
46
Which type of oscillator uses a tank circuit?
LC Oscillators
47
Which analog device provides a given waveform at a constant peak amplitude and specific frequency to maintain the waveform within its limits?
Oscillators
48
A demodulator is also known as a(an) ________?
Detector circuit
49
Which analog circuit is designed to separate the intelligence from the carrier wave?
Demodulators
50
A limiter is a _________?
Half-wave rectifier
51
What analog device converts a DC input into an alternating waveform at the output?
Oscillator
52
Which analog device reduces the interaction between the load and the oscillator?
Buffer amplifiers
53
The maintenance of oscillations between pulses of excitation energy is known as ?
Flywheel effect
54
Which of the following terms best describes the condition where the time it takes a pulse to transition from 90% to 10% of its maximum amplitude?
Fall time

AAS 2 (6 decks)

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