Amplifiers Flashcards
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:
amplification
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:
amplification
What is the relationship of the input and output signals in an amplifiers.
The input signal remains unchanged and the output signal is controlled by the input signal.
What is the relationship of the input and output signals in an amplifiers.
The input signal remains unchanged and the output signal is controlled by the input signal.
Why are amplifiers used in electronic devices?
To provide signals of usable amplitude
Why are amplifiers used in electronic devices?
To provide signals of usable amplitude
Most amplifiers can be classified in which of the following ways?
Function and frequency response
Most amplifiers can be classified in which of the following ways?
Function and frequency response
The speaker system of a record player should be driven by which type of amplifier?
An audio power amplifier
The speaker system of a record player should be driven by which type of amplifier?
An audio power amplifier
The signal from a radio antenna should be amplified by which type of amplifier?
An rf voltage amplifier
The signal from a radio antenna should be amplified by which type of amplifier?
An rf voltage amplifier
The class of operation is determined by which factor?
The amount of time (in relation to the input signal) that current flows in the output circuit.
The class of operation is determined by which factor?
The amount of time (in relation to the input signal) that current flows in the output circuit.
Which are the three classes of operation for an amplifier?
A,B,AB
Which are the three classes of operation for an amplifier?
A,B,AB
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?
C
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?
C
What class of operation is the most effective?
C
What class of operation is the most effective?
C
What class of operation has the highest fidelity?
A
What class of operation has the highest fidelity?
A
What is the purpose of an amplifier coupling network?
To transfer energy from one stage to another
What is the purpose of an amplifier coupling network?
To transfer energy from one stage to another
Which are the methods of coupling amplifier stages?
RC, Impedance, Transformer
Which are the methods of coupling amplifier stages?
RC, Impedance, Transformer
Which is the type of coupling that is usually used to couple the output from a power amplifier?
Transformer
Which is the type of coupling that is usually used to couple the output from a power amplifier?
Transformer
Which amplifier type of couplers have both high and low frequency response limitations?
RC
Which amplifier type of couplers have both high and low frequency response limitations?
RC
Which type of coupling is the most effective at high frequencies?
Impedance
Which type of coupling is the most effective at high frequencies?
Impedance
For maximum power transfer between circuits, what impedance relationship should there be between the two circuits?
The output impedance of the circuit number one should be equal to the input impedance of circuit number two.
For maximum power transfer between circuits, what impedance relationship should there be between the two circuits?
The output impedance of the circuit number one should be equal to the input impedance of circuit number two.
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?
Lower than
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?
Lower than
What is the (a) input impedance and (b) output impedance of a common-base transistor configuration?
(a)Low (b)High
What is the (a) input impedance and (b) output impedance of a common-base transistor configuration?
(a)Low (b)High
What transistor configuration should be used to match a high output impedance to a low input impedance?
Common-collector
What transistor configuration should be used to match a high output impedance to a low input impedance?
Common-collector
What is feedback?
The coupling of a portion of the output signal to the input signal to the input of the circuit.
What is feedback?
The coupling of a portion of the output signal to the input signal to the input of the circuit.
What terms describe the two types of feedback?
Positive and Negative, Degenerative and Regenerative
What terms describe the two types of feedback?
Positive and Negative, Degenerative and Regenerative
What type of feedback provides and increased amplitude output signal?
Positive/Regenerative
What type of feedback provides and increased amplitude output signal?
Positive/Regenerative
