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Electronics Engineering > Amplifiers > Flashcards

Amplifiers Flashcards

1
Q

The control of an output signal by an input signal resulting in the output signal having some (or all) of the characteristics of the input is known as:

A

amplification

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1
Q

The control of an output signal by an input signal resulting in the output signal having some (or all) of the characteristics of the input is known as:

A

amplification

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2
Q

What is the relationship of the input and output signals in an amplifiers.

A

The input signal remains unchanged and the output signal is controlled by the input signal.

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2
Q

What is the relationship of the input and output signals in an amplifiers.

A

The input signal remains unchanged and the output signal is controlled by the input signal.

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3
Q

Why are amplifiers used in electronic devices?

A

To provide signals of usable amplitude

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3
Q

Why are amplifiers used in electronic devices?

A

To provide signals of usable amplitude

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4
Q

Most amplifiers can be classified in which of the following ways?

A

Function and frequency response

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4
Q

Most amplifiers can be classified in which of the following ways?

A

Function and frequency response

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5
Q

The speaker system of a record player should be driven by which type of amplifier?

A

An audio power amplifier

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5
Q

The speaker system of a record player should be driven by which type of amplifier?

A

An audio power amplifier

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6
Q

The signal from a radio antenna should be amplified by which type of amplifier?

A

An rf voltage amplifier

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6
Q

The signal from a radio antenna should be amplified by which type of amplifier?

A

An rf voltage amplifier

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7
Q

The class of operation is determined by which factor?

A

The amount of time (in relation to the input signal) that current flows in the output circuit.

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7
Q

The class of operation is determined by which factor?

A

The amount of time (in relation to the input signal) that current flows in the output circuit.

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8
Q

Which are the three classes of operation for an amplifier?

A

A,B,AB

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8
Q

Which are the three classes of operation for an amplifier?

A

A,B,AB

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9
Q

If the output of a circuit should be a representation of less than one-half of the input signal, what class of operation should be used?

A

C

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9
Q

If the output of a circuit should be a representation of less than one-half of the input signal, what class of operation should be used?

A

C

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10
Q

What class of operation is the most effective?

A

C

10
Q

What class of operation is the most effective?

A

C

11
Q

What class of operation has the highest fidelity?

A

A

11
Q

What class of operation has the highest fidelity?

A

A

12
Q

What is the purpose of an amplifier coupling network?

A

To transfer energy from one stage to another

12
Q

What is the purpose of an amplifier coupling network?

A

To transfer energy from one stage to another

13
Q

Which are the methods of coupling amplifier stages?

A

RC, Impedance, Transformer

13
Q

Which are the methods of coupling amplifier stages?

A

RC, Impedance, Transformer

14
Q

Which is the type of coupling that is usually used to couple the output from a power amplifier?

A

Transformer

14
Q

Which is the type of coupling that is usually used to couple the output from a power amplifier?

A

Transformer

15
Q

Which amplifier type of couplers have both high and low frequency response limitations?

A

RC

15
Q

Which amplifier type of couplers have both high and low frequency response limitations?

A

RC

16
Q

Which type of coupling is the most effective at high frequencies?

A

Impedance

16
Q

Which type of coupling is the most effective at high frequencies?

A

Impedance

17
Q

For maximum power transfer between circuits, what impedance relationship should there be between the two circuits?

A

The output impedance of the circuit number one should be equal to the input impedance of circuit number two.

17
Q

For maximum power transfer between circuits, what impedance relationship should there be between the two circuits?

A

The output impedance of the circuit number one should be equal to the input impedance of circuit number two.

18
Q

For maximum current at the input to a circuit, what should the relationship of the input impedance be to the output impedance of the previous stage?

A

Lower than

18
Q

For maximum current at the input to a circuit, what should the relationship of the input impedance be to the output impedance of the previous stage?

A

Lower than

19
Q

What is the (a) input impedance and (b) output impedance of a common-base transistor configuration?

A

(a)Low (b)High

19
Q

What is the (a) input impedance and (b) output impedance of a common-base transistor configuration?

A

(a)Low (b)High

20
Q

What transistor configuration should be used to match a high output impedance to a low input impedance?

A

Common-collector

20
Q

What transistor configuration should be used to match a high output impedance to a low input impedance?

A

Common-collector

21
Q

What is feedback?

A

The coupling of a portion of the output signal to the input signal to the input of the circuit.

21
Q

What is feedback?

A

The coupling of a portion of the output signal to the input signal to the input of the circuit.

22
Q

What terms describe the two types of feedback?

A

Positive and Negative, Degenerative and Regenerative

22
Q

What terms describe the two types of feedback?

A

Positive and Negative, Degenerative and Regenerative

23
Q

What type of feedback provides and increased amplitude output signal?

A

Positive/Regenerative

23
Q

What type of feedback provides and increased amplitude output signal?

A

Positive/Regenerative

Electronics Engineering (1 decks)

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