Foshan Xinghongde Technology Co., Ltd.
Focus Us On
DOWNLOAD

Class d Pa Amplifier Improves Audio Quality

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 jitter of the modulator is actually independent and unrelated to other audio clocks. Another advantage of SRC is that the output switching ratio of SRC is fixed no matter how the sampling rate of input audio fluctuates, which is different from that of PLL-based modulator. When the audio input source changes or the input clock is missing, SRC also improves the system's durability by eliminating audible noise.

Similar to the current high-end DAC technology, the audio quality of class d Pa amplifier has been improved by integrating high-order-processing technology. The modulator based on Δ-Σ technology can reduce the internal feedback of modulation error. By reducing the sampling error, the modulator can improve the output distortion and obtain better sound quality.
Related News
  • Detailed Explanation of Best Column Speakers

    Detailed Explanation of Best Column Speakers

    April 24, 2019The directivity of best column speakers decreases with the decrease of frequency. That is to say, the directivity at low frequencies is very poor. Therefore, the vertical directivity of the sound colu...view
  • Overview of class D Pa Amplifier

    Overview of class D Pa Amplifier

    March 29, 2019Class 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 am...view
  • The Placement Method of the Amplified Speakers (A)

    The Placement Method of the Amplified Speakers (A)

    November 4, 2020The different positions of the amplified speakers would directly affect their sound balance, depth of the sound field, deep bass effect and sound quality of midrange. The correct placement method is t...view
  • Usage of BGM System Speaker

    Usage of BGM System Speaker

    March 29, 2019Background music is abbreviated as BGM, which is the abbreviation of Back Ground Music. The main function of the loudspeaker of BGM system is to cover up noise and create a relaxed and harmonious atmo...view
  • Public Address System from Simple to Complex

    Public Address System from Simple to Complex

    January 14, 2021A simple public address system can only release voice broadcasts. If you want to play background music, broadcast news, and release recordings, you can add CDs, tuners (radios), MP3 players and other ...view
  • Cautions for IC Heat Dissipation of Class d Pa Amplifier

    Cautions for IC Heat Dissipation of Class d Pa Amplifier

    March 29, 2019Class d Pa amplifier has higher efficiency and better thermal performance than Class AB loudspeakers. Nevertheless, the heat dissipation of class D amplifier still needs careful consideration. The the...view
chat
  • TEL:+86-13076829269
  • FAX:
  • EMAIL:info@rh-audio.net
  • ADDRESS:No. 601-2,602,603,Building 11,Zone 2,Wanyang S&T Park,Beijiao Town,Shunde District,Foshan City,Guangdong Province,China