US 12,218,693 B2
Low power digital PDM microphone interfacing for always-on applications
Joseph Cordaro, Huntington Beach, CA (US); and David Garrett, Tustin, CA (US)
Assigned to SYNTIANT, Irvine, CA (US)
Filed by SYNTIANT, Irvine, CA (US)
Filed on Jul. 26, 2022, as Appl. No. 17/874,236.
Prior Publication US 2024/0039555 A1, Feb. 1, 2024
Int. Cl. H03M 3/00 (2006.01); G06F 1/10 (2006.01); H03K 19/21 (2006.01); H04R 1/40 (2006.01); H04R 3/00 (2006.01); H04R 19/04 (2006.01)
CPC H03M 3/458 (2013.01) [G06F 1/10 (2013.01); H04R 1/406 (2013.01); H04R 3/005 (2013.01); H04R 19/04 (2013.01); H03K 19/21 (2013.01); H04R 2201/003 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A device comprising:
a clock source configured to distribute a series of clock pulses, wherein:
each clock pulse comprises a first phase and a second phase; and
a first microphone, comprising:
a first transducer,
a first sigma-delta modulator,
a first singleton-suppression encoder,
a first doubleton-suppression encoder, and
a first output driver.