People had been persevering class A power amplifier in the sound world. They thought that class A power amplifier sound is clear, and has high fidelity. But class A power amplifier's low efficiency and the high loss are actually the congenital stubborn illness which it is unable to overcome. Although class B power amplifier's efficiency higher than class A, but the actual efficiency is only about 50%, in the small portable acoustic equipment like automobile power amplifier, the notebook audio frequency system and the specialized ultra high efficiency power amplifier situation, still felt the efficiency somewhat low not to be satisfied . Therefore, because of high efficiency, class D power amplifier become to be used by more and more people.
This design's topic is design a digital power amplifier. Through to deal with voice signal's sampling, the quantification, processing and so on filtration, obtains the output signal which has low distortion and high power. I choice TA2024 to design the electric circuit
Keywords : Sound; Power amplifier; Class D; TA2024