What is Push-Pull Amplifier explain with diagram?

What is Push-Pull Amplifier explain with diagram?

Push-Pull Amplifier is a power amplifier which is used to supply high power to the load. It consists of two transistors in which one is NPN and another is PNP. One transistor pushes the output on positive half cycle and other pulls on negative half cycle, this is why it is known as Push-Pull Amplifier.

What is the need of Push-Pull Amplifier?

Push pull amplifiers are commonly used in situations where low distortion, high efficiency and high output power are required. The basic operation of a push pull amplifier is as follows: The signal to be amplified is first split into two identical signals 180° out of phase.

Why is it called Push-Pull Amplifier?

A Push-Pull Amplifier combines two signals to form a third signal. The circuit is called a Push-Pull because one transistor pushes in one direction while the other pulls in another direction. Both transistors are NPN types in this case. A common small signal BJT is the 2N2222 NPN Transistor [low power].

What is the disadvantage of a Push-Pull Amplifier?

Following are the disadvantages of a Push-Pull amplifier: It requires two equal and opposite voltages at the input, therefore, driver stage has to be employed. Unequal amplification of the two halves of the signal introduces more distortion. Two identical transistors are required.

Which amplifier is used in push-pull amplifier?

Push-Pull is a power amplifier that is used to supply high power to the load. It consists of two transistors in which one is NPN and another is PNP. One transistor pushes the output on a positive half-cycle and the other pulls on a negative half cycle. This is why it is known as a push-pull amplifier.

What is push-pull output in microcontroller?

Push-pull output Push-pull is the default GPIO output setting in most cases. With a push-pull GPIO, a transistor connects to VCC or GND to drive a signal high or low. When the output goes low, the signal is actively “pulled” to ground, and when the output goes high it is actively “pushed” to VCC.

What is the disadvantage of a class B push-pull amplifier?

The Class B amplifier circuit above uses complimentary transistors for each half of the waveform and while Class B amplifiers have a much high gain than the Class A types, one of the main disadvantages of class B type push-pull amplifiers is that they suffer from an effect known commonly as Crossover Distortion.

What is the disadvantages of a class B push-pull amplifier?

What is a complementary class B push-pull amplifier?

The two transistors conduct in the opposite half cycle of the input signal. As the transistors are both complement to each other, yet act symmetrically while being connected in push pull configuration of class B, this circuit is termed as Complementary symmetry push pull class B amplifier.

What is the efficiency of class B push-pull amplifier?

The maximum efficiency of the class B amplifier is 78.5%.

Can a push-pull amp be Class A?

You can, indeed have a true class A amplifier that operates in push-pull mode. Amplifier class has absolutely nothing to do with output stage topology.

How do you make a push-pull amplifier?

Push-pull Amplifier Working The input coupling transformer T1 divides the input signal into two identical halves, every 180 degrees out of phase. One transistor gets forward biased during the positive half-cycle and passes the current. The other transistor stays reverse biased during the positive half cycle.

What is a push-pull amplifier and how does it work?

All audio power amplifiers used in the record player, transistor radio receivers, tape recorders etc make use of push-pull arrangement because these systems are usually operated by batteries where efficiency is the primary factor. Let’s have a look at its circuit diagram and operation. A push-pull amplifier circuit diagram is shown above.

How does a push-pull transistor work?

The N-P-N transistor here acts as a push amplifier where the positive cycle is amplified. P-N-P in this transistor acts as the pull amplifier where it enacts on the negative cycle of the applied input signal. The push-pull amplifier is designed based on the above circuit diagram.

How to test BJT push-pull amplifier?

Let as exam the BJT push-pull amplifier along first. Any BJT’s need at least 0.5V to 0.7V of forward base-emitter bias voltage before they will go into conduction. In push-pull amplifier both of the transistors will be non-conducting (OFF), when the input signal is in the range +/- 0.5V.

What causes crossover distortion in a push-pull amplifier?

In push-pull amplifier both of the transistors will be non-conducting (OFF), when the input signal is in the range +/- 0.5V. And this creates an “deadzone”. And also this “deadzone” produce the crossover distortion in the output.