US Patent Issued to SYNTIANT on Feb. 4 for "Low power digital PDM microphone interfacing for always-on applications" (California Inventors)

ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,218,693, issued on Feb. 4, was assigned to SYNTIANT (Irvine, Calif.).

"Low power digital PDM microphone interfacing for always-on applications" was invented by Joseph Cordaro (Huntington Beach, Calif.) and David Garrett (Tustin, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An encoding technique for reducing the power of PDM microphones is disclosed. Digital MEMS microphones utilize a modulation technique called Pulse Density Modulation (PDM), where a single data line (PDMDAT) is used to convey the digital information from the microphone source to a receiver. A characteristic of PDM is that a low noise signal will produce the most transitions, a ...