RH-AUDIO

  Compared with Class A/B amplifier,  class d Pa amplifier   has poor audio performance. It not only has large distortion, but also has narrow dynamic range. Therefore, the current designer of class d Pa amplifier must improve its performance. By integrating high-performance sampling rate converter (SRC) and_-processing technology, the new generation of solutions can greatly improve the distortion (THD+N), and the dynamic range is over 100 dB.   Nowadays, one of the noise sources of class d Pa amplifier is the jitter of the audio sampling clock. Clocks are usually generated by SOC (MPEG decoder, DSP, etc.). Even small jitter can rapidly affect the performance of conventional class D amplifiers, because the audio clock is associated with the output clock of the modulator.   One way to solve this problem is to use SRC technology. Because SRC uses locally stable clock sources to synchronize digital audio clocks, such as quartz crystal oscillators, So the output jit...

  Class D Pa amplifier  drives the amplifier of loudspeaker by controlling ON/OFF of switch unit. Class D Pa amplifier was first proposed in 1958, and it has become popular in recent years. Class D Pa amplifier has been greatly developed in the past few generations. System designers have greatly improved the durability and audio quality of the system. Digital amplifiers improve audio quality and system performance. In fact, for most applications, the benefits of using these amplifiers far outweigh their disadvantages.   In traditional Class D Pa amplifier, analog or digital audio signals are converted into PWM signals by a controller before being amplified by power MOSFET tubes integrated into power back-end devices. These amplifiers are highly efficient, use very small radiators or do not need radiators at all, and reduce the power output requirements. However, compared with traditional class A/B amplifiers, they also have inherent cost, performance and EMI problems. To ...