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Understanding PDM Digital Audio - users.ece.utexas.edu
https://users.ece.utexas.edu/~bevans/courses/rtdsp/lectures/10_Data_Conversion/AP_Understanding_PDM_Digital_Audio.pdf
Understanding PDM Digital Audio 3 Introduction PDM stands for pulse density modulation. However, it is really better summarized as “oversampled 1-bit audio”, as it is nothing more than a high sampling rate, single-bit digital system. If one increased the sample rate of audio CDs by a large factor, and reduced the wordlength from 16 bits to ...
Understanding PDM Digital Audio - Audio Precision
https://www.ap.com/download/understanding-pdm-digital-audio-2/
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Interfacing PDM digital microphones using STM32 …
https://www.st.com/resource/en/application_note/dm00380469-interfacing-pdm-digital-microphones-using-stm32-mcus-and-mpus-stmicroelectronics.pdf
Interfacing PDM digital microphones using STM32 MCUs and MPUs Introduction Digital MEMS (microelectromechanical systems) microphones target all audio applications where small size, high sound quality, reliability and affordability are key requirements.
More about PDM - Audio Precision
https://www.ap.com/technical-library/more-about-pdm/
PDM is the technology used in many oversampling ADCs and DACs, and is the basis of the Sony/Philips commercial digital format and disc trade-named DSD and SACD, respectively. A one-bit stream is unacceptably noisy, but very high sampling rates and noise shaping techniques are used to greatly reduce the noise in the audio spectrum.
MAX98356 PDM Input Class D Audio Power Amplifier
https://datasheets.maximintegrated.com/en/ds/MAX98356.pdf
General Description The MAX98356 is a digital pulse-density modulated (PDM) input Class D power amplifier that provides Class AB audio performance with Class D efficiency. This IC offers five selectable gain settings (3dB, 6dB, 9dB, 12dB, and 15dB) set by a single gain-select input (GAIN). The MAX98356 takes a stereo pulse density modulated
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