The efficiency of a class B push-pull amplifier is

The efficiency of a class B push-pull amplifier is
by

1 Answer

Answer :

The efficiency of a class B push-pull amplifier is 75-80%

by

Related questions

Draw the circuit diagram of complementary symmetry Class B push-pull amplifier and describe its working.

Description : Draw the circuit diagram of complementary symmetry Class B push-pull amplifier and describe its working.

Last Answer : Diagram of complementary symmetry Class B push-pull amplifier: Working: The above circuit employs a NPN transistor and a PNP transistor connected in push pull configuration. When the input ... of class B, this circuit is termed as Complementary symmetry push pull class B amplifier.

Explain with circuit diagram and waveform the operation of class AB push pull power amplifier.

Description : Explain with circuit diagram and waveform the operation of class AB push pull power amplifier.

Last Answer : Class AB Push Pull Power Amplifier:  Circuit Diagram:  Circuit Decription: The circuit consists of two centre-tapped transformers T1 and T2, two identical transistors Q1 and Q2 , Resistor R and ... two halves & produces a full sine wave in the load resistor. Waveform :

working of class B push pull amplifier.

Description : working of class B push pull amplifier.

Last Answer : Circuit Diagram:- Operation:  In class B amplifier transistor conduct only for half cycle of input signal.One conduct in positive half cycle and other conducts in negative half ... Then output transformer joins these two halves and produces a full sine wave in the load resistor. 

Draw diagram of class A push-pull amplifier and explain its operation.

Description : Draw diagram of class A push-pull amplifier and explain its operation. 

Last Answer : Class A Push-pull Amplifier: The circuit diagram of class A push-pull amplifier is as shown in the fig.(a). Operation: The resistors R1 and R2 along with Vcc provide the dc biasing so as ... Vcc is applied to the collectors of transistors Q1 and Q2 through the centretapped output transformer. 

Cross over distortion in class - B push-p amplifiers:

Description : Cross over distortion in class - B push-p amplifiers:  1. Is due to transistor operating near saturation region  2. Can be eliminated by operating them in class operation  3. Occurs because two power transistors do not exactly matching parameters  4. Always occurs in low signal area

Last Answer : Cross over distortion in class - B push-p amplifiers:  1. Is due to transistor operating near saturation region  2. Can be eliminated by operating them in class operation  3. Occurs because two power transistors do not exactly matching parameters  4. Always occurs in low signal area

A push pull amplifier balances out A) Odd harmonics B) Even harmonics C) Both odd as well as even harmonics D) Neither odd nor even harmonics.

Description : A push pull amplifier balances out A) Odd harmonics B) Even harmonics C) Both odd as well as even harmonics D) Neither odd nor even harmonics.

Last Answer : A) Odd harmonics

Draw the circuit of complementary, symmetry push pull amplifier and explain its working.

Description : Draw the circuit of complementary, symmetry push pull amplifier and explain its working.

Last Answer : COMPLEMENTRY SYMMETRY CLASS B PUSH PULL AMPLIFIER  Circuit Diagram:  Circuit description: * Two transistors one NPN & other PNP is used in the circuit so they are complementary to each other. ... conducts & NPN remains OFF.  So we get remaining half cycle in the output.

When large amount of power is required, a push pull amplifier is designed for operation as

Last Answer : When large amount of power is required, a push pull amplifier is designed for operation as class B.

Class A amplifier is used when

Description : Class A amplifier is used when  (A) No phase inversion is required (B) Highest voltage gain is required (C) dc voltages are to be amplified (D) Minimum distortion is desired. 

Last Answer : Class A amplifier is used when Minimum distortion is desired. 

In class - A power amplifier, the collector dissipation is maximum when

Description : In class - A power amplifier, the collector dissipation is maximum when  (a) no signal is present  (b) signal swing is maximum  (c) signal swing is (1/1.414) of its maximum  (d) none of the above

Last Answer : In class - A power amplifier, the collector dissipation is maximum when no signal is present

In Class ‘B’ amplifier, the output current flows for

Description : In Class ‘B’ amplifier, the output current flows for

Last Answer : In Class ‘B’ amplifier, the output current flows for half input cycle

In class-A amplifier conduction extends over 360° because the operating point.

Description : In class-A amplifier conduction extends over 360° because the operating point.  1. Located near saturation point 2. Located at or near cut-off point 3. Located on load line 4. Located in the centre of load line 

Last Answer : In class-A amplifier conduction extends over 360° because the operating point.  1. Located near saturation point 2. Located at or near cut-off point 3. Located on load line 4. Located in the centre of load line 

The unity gain bandwidth of an inverting amplifier is 10 MHz What would be the bandwidth if the gain is

Description : The unity gain bandwidth of an inverting amplifier is 10 MHz What would be the bandwidth if the gain is increased to 10 V/V? A) 100 MHz B) 1 MHz C) 10 MHz D) 1 kHz 

Last Answer : The unity gain bandwidth of an inverting amplifier is 10 MHz What would be the bandwidth if the gain is increased to 10 V/V? A) 100 MHz B) 1 MHz C) 10 MHz D) 1 kHz 

The ideal operational amplifier does not have:

Description : The ideal operational amplifier does not have: (1) Infinite input resistance (2) Infinite output resistance (3) Infinite voltage gain (4) Infinite bandwidth 

Last Answer : The ideal operational amplifier does not have: Infinite output resistance

An amplifier without feedback has a voltage gain of 50, input resistance 1kΩ and output resistance of 2.5kΩ.

Description : An amplifier without feedback has a voltage gain of 50, input resistance 1kΩ and output resistance of 2.5kΩ. The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 would be: (1) 1/11 kΩ (2) 1/5 kΩ (3) 5 kΩ (4) 11 kΩ

Last Answer : An amplifier without feedback has a voltage gain of 50, input resistance 1kΩ and output resistance of 2.5kΩ. The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 would be: 1/11 kΩ

The gain of an FET amplifier can be changed by changing:

Description : The gain of an FET amplifier can be changed by changing: (1) rm (2) gm (3) Rd (4) None of these

Last Answer : The gain of an FET amplifier can be changed by changing: gm

If the feedback factor of an amplifier is 0.1 and its gain without feedback is 40, then its gain with feedback is

Description : If the feedback factor of an amplifier is 0.1 and its gain without feedback is 40, then its gain with feedback is (a) – 13.3 (b) 200 (c) 8 (d) 10 

Last Answer : If the Feedback Factor of an amplifier is 0.1 and its gain without feedback is 40, then feedback is 40,then its gain with feedback is 8.

A low noise amplifier has an effective noise temperature of 50 k. The absolute noise figure is

Description : A low noise amplifier has an effective noise temperature of 50 k. The absolute noise figure is

Last Answer : A low noise amplifier has an effective noise temperature of 50 k. The absolute noise figure is 1.172

An amplifier operating over the frequency range from 18 to 20 MHz has 10 kilo ohm input resistor. What is

Description : An amplifier operating over the frequency range from 18 to 20 MHz has 10 kilo ohm input resistor. What is the r.m.s. noise voltage at the input to this amplifier if the ambient temperature is 27o C

Last Answer : An amplifier operating over the frequency range from 18 to 20 MHz has 10 kilo ohm input resistor. What is the r.m.s. noise voltage at the input to this amplifier if the ambient temperature is 27o C 18.2 microvolt

For a feedback amplifier, if the loop gain is much greater than unity, the closed loop gain will be equal to

Description : For a feedback amplifier, if the loop gain is much greater than unity, the closed loop gain will be equal to

Last Answer : For a feedback amplifier, if the loop gain is much greater than unity, the closed loop gain will be equal to inverse of feedback factor

For Cascode amplifier the output impedance becomes

Description : For Cascode amplifier the output impedance becomes 

Last Answer : For Cascode amplifier the output impedance becomes very high

An amplifier without feedback has a gain of 1000. The gain with a negative feedback of 0.009 is

Description : An amplifier without feedback has a gain of 1000. The gain with a negative feedback of 0.009 is  A) 10 B) 100 C) 125 D) 900

Last Answer : 100

An operational amplifier has an open loop gain of 200,000. Its output exhibits saturation at 10V.

Description : An operational amplifier has an open loop gain of 200,000. Its output exhibits saturation at 10V. The threshold differential voltage of the amplifier is  A) 25 micro-volt B) 50 micro-volt C) 5 Volts D) 10 volts

Last Answer : An operational amplifier has an open loop gain of 200,000. Its output exhibits saturation at 10V. The threshold differential voltage of the amplifier is 50 micro-volt

In a radio receiver the IF amplifier

Description : In a radio receiver the IF amplifier  (A) is tuned above the stations incoming frequency (B) amplifies the output of local oscillator (C) is fixed tuned to one particular frequency (D) can be tuned to various isolate frequencies

Last Answer : In a radio receiver the IF amplifier is fixed tuned to one particular frequency

Negative feedback amplifier has a signal corrupted by noise as its input. The amplifier will

Description : Negative feedback amplifier has a signal corrupted by noise as its input. The amplifier will   (A) Amplify the noise as much as the signal (B) Reduce the noise (C) Increase the noise (D) Not effect the noise

Last Answer : Negative feedback amplifier has a signal corrupted by noise as its input. The amplifier will Reduce the noise

In an IF amplifier, the IF transformer is provided with tapping to

Description : In an IF amplifier, the IF transformer is provided with tapping to  (a) increase the voltage gain (b) increase the bandwidth of the resonance circuit (c) increase the impedance ... resonance circuit to the following cascaded amplifier (d) increase the quality factor of the resonance circuit 

Last Answer : In an IF amplifier, the IF transformer is provided with tapping to increase the voltage gain

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

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Which of the following amplifier has the least distortion.

Description : Which of the following amplifier has the least distortion. • Class E • Class D • Class C • Class A

Last Answer : Which of the following amplifier has the least distortion. • Class E • Class D • Class C • Class A

The battery operated pre-amplifier with a consumption of 10 Watts can work on battery of 12

Description : The battery operated pre-amplifier with a consumption of 10 Watts can work on battery of 12 volt, 100 AH having efficiency of 50% for • 120 hrs. • 60 hrs. • 100 hrs. • 10 hrs.

Last Answer : The battery operated pre-amplifier with a consumption of 10 Watts can work on battery of 12 volt, 100 AH having efficiency of 50% for 60 hrs.

The voltage gain of a common base amplifier depends on

Description : The voltage gain of a common base amplifier depends on  1. Load resistor RL 2. input resistance of transistor 3. Ac alpha 4. All the above 

Last Answer : The voltage gain of a common base amplifier depends on  1. Load resistor RL 2. input resistance of transistor 3. Ac alpha 4. All the above 

Just as a voltage amplifier signal voltage a power amplifier.

Description : Just as a voltage amplifier signal voltage a power amplifier.  1.amplifier power  2.amplifier signal  3.converts the signal ac power into DC power  4.converts a dc power into useful AC power 

Last Answer : Just as a voltage amplifier signal voltage a power amplifier.  1.amplifier power  2.amplifier signal  3.converts the signal ac power into DC power  4.converts a dc power into useful AC power 

Harmonic distortion of the signal is produced in an RC coupled transistor amplifier. The probable

Description : Harmonic distortion of the signal is produced in an RC coupled transistor amplifier. The probable component responsible for this distortion is  (A) The transistor itself  (B) the power supply Vcc  (C) the coupling capacitor Cc  (D) the biasing resistors

Last Answer : Harmonic distortion of the signal is produced in an RC coupled transistor amplifier. The probable component responsible for this distortion is The transistor itself 

The main component responsible for the fall of gain of an RC coupled amplifier in low frequency

Description : The main component responsible for the fall of gain of an RC coupled amplifier in low frequency range is  (A) The active device itself (tube, or transistor)  (B) stray shunt capacitance Cs  (C) the grid leak resistance Rg  (D) coupling capacitor Cc

Last Answer : The main component responsible for the fall of gain of an RC coupled amplifier in low frequency range is coupling capacitor Cc

The main function of the transformer used in the output of a power amplifier is

Description : The main function of the transformer used in the output of a power amplifier is  (A) To step up the voltage  (B) to increase the voltage gain  (C) to safeguard the transistor against overheating  (D) to match the load impedance with dynamic output resistance of the transistor

Last Answer : The main function of the transformer used in the output of a power amplifier is to match the load impedance with dynamic output resistance of the transistor

Negative feedback in an amplifier is accompanied by

Description : Negative feedback in an amplifier is accompanied by (A) Gain less sensitive to component variations (B) Increase in gain (C) Decrease in bandwidth (D) None of the above

Last Answer : Negative feedback in an amplifier is accompanied by Gain less sensitive to component variations 

What is the importance of negative feedback in the operational amplifier?

Description : What is the importance of negative feedback in the operational amplifier? (A) It maintains the gain (B) The voltage difference between the input terminals is maintained at a very small value ( ... value (D) The voltage difference between the input terminals is maintained at a very high value

Last Answer : The voltage difference between the input terminals is maintained at a very small value

The closed-loop voltage gain of an inverting amplifier equal to

Last Answer : The closed-loop voltage gain of an inverting amplifier equal to The feedback resistance divided by the input resistance.

Compare between class A and class B amplifier on the basis of (i) Efficiency (ii) Power (iii) Position of Q- point (iv) O/P distortion

Description : Compare between class A and class B amplifier on the basis of (i) Efficiency (ii) Power (iii) Position of Q- point (iv) O/P distortion

Last Answer : Parameter Class A Class B 

What is the efficiency of Class-B amplifier?

Description : What is the efficiency of Class-B amplifier?  A) 68.50% B) 78.50% C) 88.50% D) 98.50%

Last Answer : What is the efficiency of Class-B amplifier?  A) 68.50% B) 78.50% C) 88.50% D) 98.50%

Why can my muscles lift, pull, and push more than my body weight?

Description : Why can my muscles lift, pull, and push more than my body weight?

Last Answer : It’s a question of leverage. You can’t push your body weight if you don’t have anything to push against.

(i) What is meant by pull migration and push migration ? -Geography

Description : (i) What is meant by pull migration and push migration ? -Geography

Last Answer : (i) Pull Migration: There is a vast scope of employment in industries, trade, transport and other services in the urban centres. So, the urban centres act as magnets for the ... primarily engaged in secondary and tertiary activities of which industry, trade, transport and services are important.

The things I bite, they don't bleed, I don't bite until you push me; I bring my victims together each time I bite, But they'll come undone if you pull it just right. What am I? -Riddles

Description : The things I bite, they don't bleed, I don't bite until you push me; I bring my victims together each time I bite, But they'll come undone if you pull it just right. What am I? -Riddles

Last Answer : A Stapler.

what push or pull that can cage an objects motion.?

Description : what push or pull that can cage an objects motion.?

Last Answer : A force is a push or pull that can cause an object to move, stop, or change speed or direction.

What are Push and pull factors for England?

Description : What are Push and pull factors for England?

Last Answer : Need answer

What do scientists use the push pull theory to explain?

Description : What do scientists use the push pull theory to explain?

Last Answer : Feel Free to Answer

What are the push and pull factors for Georgia?

Description : What are the push and pull factors for Georgia?

Last Answer : Need answer

Where can I purchase a Weslo Cardio Glide new or used exercise machine, with seat, handlebar and pedals I don't want a treadmill. The seat rises as you push your legs out, feet on the pedals, pull the handle bar towards you. What is approximate price?

Description : Where can I purchase a Weslo Cardio Glide new or used exercise machine, with seat, handlebar and pedals I don't want a treadmill. The seat rises as you push your legs out, feet on the pedals, pull the handle bar towards you. What is approximate price?

Last Answer : The Weslo Cardio Glide machine is difficult to find new however there is one etailer that still carries it, www.ranchomurieta.com. It may be easier however to simply purchase another machine with the ... as Craigslist.org where you can occasionally find the Weslo Cardio Glide for around $20 - $40.

The pressure rise in the impeller of centrifugal compressor is achieved by A. the decrease in volume and diffusion action B. the centrifugal action and decrease in volume C. the centrifugal and diffusion action D. the centrifugal and push pull action

Description : The pressure rise in the impeller of centrifugal compressor is achieved by A. the decrease in volume and diffusion action B. the centrifugal action and decrease in volume C. the centrifugal and diffusion action D. the centrifugal and push pull action

Last Answer : ANSWER : D

According to force-field theory, every behaviour is the result of equilibrium between which of the following ? (A) Push and pull effect (B) Strong and weak forces (C) Positive and negative forces (D) Driving and restraining forces

Description : According to force-field theory, every behaviour is the result of equilibrium between which of the following ? (A) Push and pull effect (B) Strong and weak forces (C) Positive and negative forces (D) Driving and restraining forces

Last Answer : Answer: Driving and restraining forces

The process of curing inflation by reducing money supply is called - (1) Cost-push inflation (2) Demand-pull inflation (3) Disinflation (4) Reflation

Description : The process of curing inflation by reducing money supply is called - (1) Cost-push inflation (2) Demand-pull inflation (3) Disinflation (4) Reflation

Last Answer : (3) Disinflation Explanation: Disinflation is a decrease in the rate of inflation -a slowdown in the rate of increase of the general price level of goods and services in a nation's gross ... a very short period of time. Disinflation takes place only when an economy is suffering from recession.