Power supply device, a processing chip for a digital microphone and related digital microphone
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United States of America Patent
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Aug 19, 2014
Grant Date -
Apr 12, 2012
app pub date -
Sep 29, 2011
filing date -
Oct 9, 2010
priority date (Note) -
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Abstract
A power supply device, a processing chip for a digital microphone and related digital microphone are described herein. In one aspect, a power supply device includes: at least two cascaded low-dropout linear regulators. In another aspect, a processing chip for digital microphone includes a processing module and a power supply module, wherein the power supply modules includes at least two cascaded low dropout linear regulators. In another aspect, a digital microphone includes a microphone and a processing chip, wherein the processing chip includes a processing module and a power supply module, wherein the power module includes at least two cascaded low-dropout linear regulators. Embodiments described herein provide a power supply device with higher PSRR.
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