Audio Amplifier Class Ab

These amplifiers are used for high quality sound applications.

Audio amplifier class ab. As an example class t designs which are an implementation of class d designed by tripath as opposed to a formal class utilize switching rates on the order of. Power amplifier circuits output stages are classified as a b ab and c for analog designs and class d and e for switching designs. The sta540 contains four single ended class ab audio amplifiers assembled in a multiwatt15 package. Class d amplifiers are now the go to choice for a lot of applications.

Then the amplifier classes are always defined as follows. They re great in a range of applications and are the amp of choice for many car audio upgrades and hi fi home theaters. Class ab amplifiers are also used in audio power amplifiers hi fi systems and av hi fi receivers. The amplifiers two output transistors conduct somewhere between 180 o and 360 o of the.

The amplifiers single output transistor conducts for the full 360 o of the cycle of the input waveform. A hybrid of always on class a and push pull class b topology ab amplifiers draw less power and reduce heat discharge while delivering accurate and distortion free sound. The class ab amplifier is a variation of a class b amplifier as described above except that both devices are allowed to conduct at the same time around the waveforms crossover point eliminating the crossover distortion problems of. These classes are not only used in power amplifier but also used in audio amplifiers circuits.

Each amplifier has integrated short circuit and thermal protection and diagnostic functions. The classes are based on the proportion of each input cycle conduction angle during which an amplifying device passes current. The image of the conduction angle derives from amplifying a sinusoidal signal. While all the amplifier classes previously mentioned have one or more output devices active all the time even when the amplifier is effectively idle class d amplifiers rapidly switch the output devices between the off and on state.

So in case of any kind of guidance related to these amplifiers you can check out this chart and if you do not know about these amplifiers and are confused between the selections then this chart will help you anyway. The simple design and the minimal distortion account for sensitive uses. The amplifiers two output transistors only conduct for one half that is 180 o of the input waveform. The ab classification of amplifier is currently one of the most common used types of audio power amplifier design.