PushPullVerstärker

A Push-Pull Verstärker (push-pull amplifier) is a type of electronic amplifier that uses a pair of active devices, such as transistors or vacuum tubes, to amplify an input signal. The design is characterized by the configuration where two devices operate in opposite phases, each handling one half of the waveform, thus effectively amplifying the entire signal.

This configuration offers several advantages, including improved efficiency and reduced distortion compared to single-ended designs. By alternately conducting during positive and negative halves of the input cycle, the push-pull amplifier can produce a larger output power while minimizing crossover distortion, which occurs at the zero-crossing point of the waveform.

Push-pull amplifiers are commonly employed in audio amplification, radio transmitters, and other applications requiring high power outputs and high fidelity. They are often classified into class A, B, AB, or C, depending on their conduction angle, with class AB being a popular compromise for audio applications due to its balance of efficiency and linearity.

The key components of a push-pull amplifier typically include a pair of complementary output devices (such as NPN and PNP transistors in a bipolar junction transistor configuration or push and pull vacuum tubes) and a phase inverter to generate the two opposite phase signals. Proper biasing and careful circuit design are essential to ensure minimal distortion and optimal performance.

Overall, the push-pull amplifier remains a fundamental concept in electronic amplification, offering an efficient way to amplify signals with reduced distortion, especially in high-power applications.