Audio amplifier circuit is a certain important thing that you have to understand well before building audio amplifier. You have to know well about the connection, what you need to prepare, and about how to build the components in proper way. By being really careful in during processing your audio amplifier circuit, your amplifier will work well in great performance.
In making small speakers or other light loads, there will be several audio amplifier circuit constructions that you can apply. As the first choice, people usually choose an integrated circuit. Other than this certain type, you can also find readily available transistors or op-amps that are specifically designed with discrete designs. Those are two of some audio amplifier circuit types that you can apply.
Besides, you also have to notice that power audio amplifier circuit is classified in some different classes for analog designs. Those classes are divided into A, B, AB and C. You can also find class D and E that are aimed for switching designs based upon the conduction angle or angle of flow. Different classes need different types of audio amplifier circuit, so you have to learn well about each type and classes before choosing a certain type and classes to be built.
Let us know more about class A audio amplifier circuit. The designs of class A are usually simpler than other classes. This class allows you to use either single-ended or push-pull. And usually, the bias of this certain class of amplifier is usually less critical. However, you can also find that Class A waste more significant power if high output powers are needed. This is the main weakness of class A type.
Then, a practical audio amplifier circuit using Class B elements is the push-pull stage. For example, you can find a very simplified complementary pair arrangement that are each used for amplifying the opposite halves of the input signal. This performance then is recombined at the output. The arrangement of this class gives excellent efficiency, but this certain type of amplifier can suffer from the drawback.
Then, you can also take a look at audio amplifier circuit in Class AB. In this operation, each device works in typical way as in Class B over half the waveform. However, it also conducts a small amount of waveform on the other half. With this certain operation, the area where both devices concurrently are nearly off (the “dead zone”) could be significantly reduced. So, when this audio amplifier circuit combines the waveforms from the two devices, the intersection could be significantly eliminated.
Meanwhile, class C amplifiers are able to conduct less than 50% of the input signal. Besides, the distortion at the output is also high while providing high efficiencies up to 90% are also quite possible. Some applications such as megaphones can tolerate the distortion well. To roughly switch the amplifying device on and off, the device uses the input signal is that causes some pulses flowing through a tuned audio amplifier circuit.
There will be some other types of amplifier that use different audio amplifier circuit. Always make sure to understand well about the circuitry before applying it for your needs.
