What is the most common form of coupling for an rf amplifier?

What is the most common form of coupling for an rf  amplifier?
by

1 Answer

Answer :

Transformer coupling.
by

Related questions

If current gain is required from an rf amplifier, what type of component should be used as an output coupling element?

Description : If current gain is required from an rf amplifier, what type of component should be used as an output coupling element?

Last Answer : A step-down transformer.

Which of the following methods cannot be used to increase the bandwidth for cascaded RF amplifier stages? A) Wave traps in each stage B) Stagger tuning C) A shunt damping resistor across each tuned circuit D) Doubled tuned transformers with tighter coupling

Description : Which of the following methods cannot be used to increase the bandwidth for cascaded RF amplifier stages? A) Wave traps in each stage B) Stagger tuning C) A shunt damping resistor across each tuned circuit D) Doubled tuned transformers with tighter coupling

Last Answer : A) Wave traps in each stage

What two methods are used to compensate for the problems that cause low gain in an rf amplifier?

Description : What two methods are used to compensate for the problems that cause low gain in an rf amplifier?

Last Answer : . RF transformers are used and the transistor is neutralized.

What problem is caused in an rf amplifier by a loosely coupled transformer?

Description : What problem is caused in an rf amplifier by a loosely coupled transformer?

Last Answer : A too-narrow bandpass.

Can a parallel LC circuit be used as the frequency determining network for an rf amplifier?

Description : Can a parallel LC circuit be used as the frequency determining network for an rf amplifier?

Last Answer : Yes.

What is the purpose of a frequency-determining network in an rf amplifier?

Description : What is the purpose of a frequency-determining network in an rf amplifier?

Last Answer : To provide maximum impedance at the desired frequency.

What is the result of pulsing a pulsed rf amplifier when no rf is present?

Description : What is the result of pulsing a pulsed rf amplifier when no rf is present?

Last Answer : Oscillations at an undesired frequency.

If the rf amplifier discussed has an 80 milliwatt input, what would be the maximum output?

Description : If the rf amplifier discussed has an 80 milliwatt input, what would be the maximum output?

Last Answer : 800 watts.

For what class of operation is the final rf power amplifier of a plate-modulator circuit biased?

Description : For what class of operation is the final rf power amplifier of a plate-modulator circuit biased?

Last Answer : Class C

What type coupling would be most useful for an audio amplifier between the first and second stages?

Description : What type coupling would be most useful for an audio amplifier between the first and second stages?

Last Answer : RC coupling.

What type coupling is usually used to couple the output from a power amplifier?

Description : What type coupling is usually used to couple the output from a power amplifier?

Last Answer : Transformer coupling.

What are four methods of coupling amplifier stages?

Description : What are four methods of coupling amplifier stages?

Last Answer : Direct, RC, impedance, and transformer coupling.

What is the purpose of an amplifier-coupling network?

Description : What is the purpose of an amplifier-coupling network?

Last Answer : To transfer energy (a signal) from one stage to another.

What is the most common method of testing a fixed rf attenuator?

Description : What is the most common method of testing a fixed rf attenuator?

Last Answer : Rf substitution method.

. What is the most common form of coupling?

Description : . What is the most common form of coupling?

Last Answer : RC coupling.

Calculate the noise figure of the receiver whose RF amplifier has an input resistance of 1000Ω and an equivalent shot-noise resistance of 2000Ω, a gain of 25 and load resistance of 125 kΩ. Given that the bandwidth is 1.0MHz and the temperature is 20˚C, and that the receiver is connected to an antenna with an impedance of 75Ω. A. 30.3 B. 3.03 C. 303 D. .303

Description : Calculate the noise figure of the receiver whose RF amplifier has an input resistance of 1000Ω and an equivalent shot-noise resistance of 2000Ω, a gain of 25 and load resistance of 125 kΩ. Given that the bandwidth is 1. ... to an antenna with an impedance of 75Ω. A. 30.3 B. 3.03 C. 303 D. .303

Last Answer : A. 30.3

When measuring a transmitter’s frequency against a suitable standard, the frequency to be measured is taken from the A. oscillator stage B. intermediate amplifier C. buffer stage D. final RF stage

Description : When measuring a transmitter’s frequency against a suitable standard, the frequency to be measured is taken from the A. oscillator stage B. intermediate amplifier C. buffer stage D. final RF stage

Last Answer : D. final RF stage

What is the meaning of forward power? A. The power traveling from the transmitter to the antenna. B. The power radiated from the top of an antenna system. C. The power produced during the positive half of an RF cycle. D. The power used to drive a linear amplifier.

Description : What is the meaning of forward power? A. The power traveling from the transmitter to the antenna. B. The power radiated from the top of an antenna system. C. The power produced during the positive half of an RF cycle. D. The power used to drive a linear amplifier.

Last Answer : A. The power traveling from the transmitter to the antenna.

What establishes the receiver bandwidth? A. RF amplifier B. Mixer C. Local oscillator D. IF amplifier

Description : What establishes the receiver bandwidth? A. RF amplifier B. Mixer C. Local oscillator D. IF amplifier

Last Answer : D. IF amplifier

What consists the front-end circuit of a VHF TV superheterodyne receiver? A. Mixer, RF amplifier and AFC? B. RF amplifier, Band pass filter and mixer C. Local oscillator, mixer and RF amplifier D. Local oscillator, AGC and antenna

Description : What consists the front-end circuit of a VHF TV superheterodyne receiver? A. Mixer, RF amplifier and AFC? B. RF amplifier, Band pass filter and mixer C. Local oscillator, mixer and RF amplifier D. Local oscillator, AGC and antenna

Last Answer : C. Local oscillator, mixer and RF amplifier

One of the following is a high powered RF ac basic transmitter that has two or more stages, the oscillator stage which determines the frequency opereation and RF amplifier stage orstages that develop the high power output. The purpose of which is to develop a good frequency stability. A. Goldsmith B. MOPA C. Alexanderson D. Hartley

Description : One of the following is a high powered RF ac basic transmitter that has two or more stages, the oscillator stage which determines the frequency opereation and RF amplifier stage orstages that develop the ... to develop a good frequency stability. A. Goldsmith B. MOPA C. Alexanderson D. Hartley

Last Answer : B. MOPA

Which of the following parts of the radio receiver represent the component that extracts the desire RF signal from the electromagnetic wave? A. AF amplifier B. Antenna C. Detector D. Crystal

Description : Which of the following parts of the radio receiver represent the component that extracts the desire RF signal from the electromagnetic wave? A. AF amplifier B. Antenna C. Detector D. Crystal

Last Answer : B. Antenna

One of the following is a possible cause of an abrupt frequency variation in a self exited transmitter oscillator circuits resulting to a poor frequency stability to hold a constant frequency oscillation. A. Heating and expansion of oscillator coil B. DC and RF ac heating of resistors which cause change in values C. Heating of capacitor in the oscillatorD. Loose connections in the oscillator, amplifier, or antenna circuits.

Description : One of the following is a possible cause of an abrupt frequency variation in a self exited transmitter oscillator circuits resulting to a poor frequency stability to hold a constant frequency ... capacitor in the oscillator D. Loose connections in the oscillator, amplifier, or antenna circuits.

Last Answer : D. Loose connections in the oscillator, amplifier, or antenna circuits.

Refers to one of the front end circuit of a VHF TV superheterodyne receiver which is usually a separate circuit coupled to the mixer. A. Antenna feed B. AGC C. RF amplifier D. Local oscillator

Description : Refers to one of the front end circuit of a VHF TV superheterodyne receiver which is usually a separate circuit coupled to the mixer. A. Antenna feed B. AGC C. RF amplifier D. Local oscillator

Last Answer : D. Local oscillator

Which of the following is one of the possible causes for a slow drift of frequency in a self exited transmitter oscillator circuits resulting to a poor frequency stability? A. Poor soldered connections B. Power supply voltage changes C. Loose connections in the oscillator, amplifier, or antenna circuits D. DC and RF heating of resistors, causing then to change values.

Description : Which of the following is one of the possible causes for a slow drift of frequency in a self exited transmitter oscillator circuits resulting to a poor frequency stability? A. Poor soldered connections ... , or antenna circuits D. DC and RF heating of resistors, causing then to change values.

Last Answer : D. DC and RF heating of resistors, causing then to change values.

After the IF stages have been aligned, the next stage to align in FM receiver is. A. local oscillator B. limiter stage C. RF amplifier D. mixer stage

Description : After the IF stages have been aligned, the next stage to align in FM receiver is. A. local oscillator B. limiter stage C. RF amplifier D. mixer stage

Last Answer : A. local oscillator

In a Klystron amplifier, the RF voltage produces

Description : In a Klystron amplifier, the RF voltage produces  (a) amplitude modulation (b) frequency modulation (c) phase modulation (d) velocity modulation

Last Answer : In a Klystron amplifier, the RF voltage produces velocity modulation

The Doppler effect causes a change in what aspect of rf energy that strikes a moving object?

Description : The Doppler effect causes a change in what aspect of rf energy that strikes a moving object?

Last Answer : Frequency.

Rotation of an rf-feed source to produce a conical scan pattern is identified by what term?

Description : Rotation of an rf-feed source to produce a conical scan pattern is identified by what term?

Last Answer : Nutation.

Atmospheric interference with the travel of electromagnetic energy increases with what rf energy characteristic?

Description : Atmospheric interference with the travel of electromagnetic energy increases with what rf energy characteristic?

Last Answer : Frequency.

At what point on an open-circuited rf line do voltage peaks occur?

Description : At what point on an open-circuited rf line do voltage peaks occur?

Last Answer : At 1/2 wavelength from the end and at every 1/2 wavelength along the line

Normally, how are high-power rf tubes tested?

Description : Normally, how are high-power rf tubes tested?

Last Answer : In their circuit.

Name the three main sections of a typical rf signal generator.

Description : Name the three main sections of a typical rf signal generator.

Last Answer : Oscillator circuit, modulator, and output control circuit.

If a wave's electric lines of force rotate through 360 degrees with every cycle of rf energy, what is the polarization of this wave?

Description : If a wave's electric lines of force rotate through 360 degrees with every cycle of rf energy, what is the polarization of this wave?

Last Answer : Circular polarization.

How does the reactance-tube modulator impress intelligence onto an rf carrier?

Description : How does the reactance-tube modulator impress intelligence onto an rf carrier?

Last Answer : By changing the reactance of an oscillator circuit in consonance with the modulating voltage.

What is Amplifier Coupling ?

Description : What is Amplifier Coupling ?

Last Answer : Amplifier coupling is the process of connecting the output of one amplifier stage to the input of another amplifier stage to amplify the weak signal in phases. Couplings are used to gain more or less.

In the illustrated circuit, one advantage of the capacitor coupling over direct coupling is ____________. EL-0048 A. as the frequency decreased the capacitive reactance (Xc) increases B. the amplifier becomes more efficient at lower capacitance. C. the arrangement allows the coupling of the signal while it isolates the biasing of each stage. D. good frequency response.

Description : In the illustrated circuit, one advantage of the capacitor coupling over direct coupling is ____________. EL-0048 A. as the frequency decreased the capacitive reactance (Xc) increases B. the amplifier becomes ... of the signal while it isolates the biasing of each stage. D. good frequency response.

Last Answer : Answer: C

In a resistance loaded, RC coupled amplifier the dc component is blocked by A) Load resistance RL B) Coupling capacitor, CC C) RB D) The transistor.

Description : In a resistance loaded, RC coupled amplifier the dc component is blocked by A) Load resistance RL B) Coupling capacitor, CC C) RB D) The transistor.

Last Answer : B) Coupling capacitor, CC

The Bandwidth of an RC-coupled amplifier is limited by: A) coupling capacitors at the low frequency end and bypass capacitors at the high frequency end B) coupling capacitors at the high frequency end and bypass capacitors at the low frequency end C) bypass and coupling capacitors at the low frequency end and shunt capacitors at the high frequency end and D) shunt capacitors at the low frequency end and bypass as well as coupling capacitors at the high frequency end.

Description : The Bandwidth of an RC-coupled amplifier is limited by: A) coupling capacitors at the low frequency end and bypass capacitors at the high frequency end B) coupling capacitors at the high frequency ... at the low frequency end and bypass as well as coupling capacitors at the high frequency end.

Last Answer : C) bypass and coupling capacitors at the low frequency end and shunt capacitors at the high frequency end and

Draw the multistage amplifier circuit diagram using RC coupling. State its advantages.

Description : Draw the multistage amplifier circuit diagram using RC coupling. State its advantages.

Last Answer : Advantages: 1. It has a wide frequency response. 2. For coupling the resistor and the capacitor are used and which are not expensive so the cost is low. 3. The circuit is very ... a wide frequency band. 5. It is high fidelity amplifier. 6. It provides less frequency distortion.

State the need and types of amplifier coupling.

Description : State the need and types of amplifier coupling. 

Last Answer : Need of amplifier coupling: 1.When ever large amplifier with very good impedance matching is required, a signal stage amplifier circuit will not able to amplify the signal to a large extent. 2 ... 2.Transformer coupled amplifier 3.Direct coupled amplifier 4. Inductance (LC) coupling

List the types of coupling used in BJT amplifier.

Description : List the types of coupling used in BJT amplifier. 

Last Answer : Types of coupling used in BJT amplifier: i. Resistance capacitance (RC)coupling ii. Impedance coupling iii. Transformer coupling iv. Direct coupling

Give the different types of amplifier coupling.

Description : Give the different types of amplifier coupling.

Last Answer : 1. Resistance – capacitance (RC) coupling.  2. Inductance (LC) coupling.  3. Transformer coupling (TC)  4. Direct coupling (D.C.)

Transformer coupling is used in class A amplifier to make it : -

Description : Transformer coupling is used in class A amplifier to make it : -  a) more efficient b) less bulky c) less costly d) distortion free

Last Answer : Transformer coupling is used in class A amplifier to make it : - more efficient

The purpose of a coupling capacitor in an amplifier is to:

Description : The purpose of a coupling capacitor in an amplifier is to:  (1) Control the output (2) Provide impedance matching (3) Provide DC isolation between amplifier and load (4) W Increase the bandwidth

Last Answer : The purpose of a coupling capacitor in an amplifier is to: Provide DC isolation between amplifier and load.

One advantage of transformer coupling in transistor amplifier is that:

Description : One advantage of transformer coupling in transistor amplifier is that:  (1) it provides excellent frequency response (2) It is simple and less expensive than others (3) Low power supply may be used (4) High efficiency and high power output is obtained.

Last Answer : One advantage of transformer coupling in transistor amplifier is that: High efficiency and high power output is obtained.

For an amplifier, the coupling method which gives the highest gain is

Last Answer : For an amplifier, the coupling method which gives the highest gain is Transformer coupling.

Loose or inefficient coupling of energy into or out of a waveguide can be accomplished by the use of what method?

Description : Loose or inefficient coupling of energy into or out of a waveguide can be accomplished by the use of what method?

Last Answer : Slots and apertures.

What are two advantages of this type of coupling?

Description : What are two advantages of this type of coupling?

Last Answer : It uses fewer components than capacitive coupling and can provide an increase in gain.

What effect does flux leakage in a transformer have on the coefficient of coupling (K) in the transformer?

Description : What effect does flux leakage in a transformer have on the coefficient of coupling (K) in the transformer?

Last Answer : it causes K to be less than unity (I).