Q: 1. What is a power amplifier used for?

Answer: A power amplifier (PA) converts a low-power signal to a higher-power one . Two common examples are audio amplifiers, used to drive loudspeakers and headphones, and RF power amplifiers, such as those used in the final stage of a transmitter.

Q: 2. Where are power amplifiers used?

Answer: High-power amplifiers are used in the transmission of cellular or FM broadcasting signals to users, in the control of most industrial actuator systems such as servos and DC motors, and in almost all consumer electronic devices such as microwave ovens, televisions, mobile phones, headphone drivers, home theater systems

Q: 3. what is cross-over distortion in a power amplifier?

Answer: Crossover distortion is a type of distortion that is caused by switching between devices driving a load . It is most commonly seen in complementary, or "push-pull", Class-B amplifier stages, although it is occasionally seen in other types of circuits as well.

Q: 4. What is cross over distortion how it can be eliminated?

Answer: The cross-over distortion in the class B power amplifier is eliminated by the Class AB power amplifier which uses diodes at the bases of transistors to reduce forward bias voltage at bases i.e. by biasing the transistors slightly above the cut-off.

Question 1

1. What is a power amplifier used for?

Accepted Answer

Answer: A power amplifier (PA) converts a low-power signal to a higher-power one. Two common examples are audio amplifiers, used to drive loudspeakers and headphones, and RF power amplifiers, such as those used in the final stage of a transmitter.

Question 2

2. Where are power amplifiers used?

Accepted Answer

Answer: High-power amplifiers are used in the transmission of cellular or FM broadcasting signals to users, in the control of most industrial actuator systems such as servos and DC motors, and in almost all consumer electronic devices such as microwave ovens, televisions, mobile phones, headphone drivers, home theater systems

Question 3

3. what is cross-over distortion in a power amplifier?

Accepted Answer

Answer: Crossover distortion is a type of distortion that is caused by switching between devices driving a load. It is most commonly seen in complementary, or "push-pull", Class-B amplifier stages, although it is occasionally seen in other types of circuits as well.

Question 4

4. What is cross over distortion how it can be eliminated?

Accepted Answer

Answer: The cross-over distortion in the class B power amplifier is eliminated by the Class AB power amplifier which uses diodes at the bases of transistors to reduce forward bias voltage at bases i.e. by biasing the transistors slightly above the cut-off.