Class D Digital Audio Amplifier Chip Algorithm And Implementation

Nowadays, with the rapid development of mutimedia technology, more and more requirements are being put forward to the audio amplifiers, including reducing the sizes and caloric emission of products, supporting multi-channel audio and Hi-Fi. The items above have become some elements of evaluating audio amplifiers. How to make audio amplifiers to conform to all the items above, has become the key of design. Under the circumstances, people has started to place importance on class D audio amplifiers.After I did some research on some information from abroad about class D digital audio amplifier , I did more research on class D audio processing algorithm. In the project, I has developed the modules of data interface, digital filter, sigma-delta modulator, digital pulse width modulator and so on, and put them together to make a complete audio processing system.The essay not only includes the principle and architecture of class D amplifier, the digital audio algorithm, but also introduces the function of each module in the circuit, and the whole design flow from algorithm design to behavior level simulation, and to FPGA verification, and to the layout of the system. The article includes the circuit system architecture and the DPWM layout.