Speaker control device
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United States of America Patent
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Apr 18, 2017
Grant Date -
May 5, 2016
app pub date -
Oct 29, 2015
filing date -
Oct 30, 2014
priority date (Note) -
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Abstract
A speaker control device in one embodiment includes a time to digital converter connected to a drive power source in series with a drive circuit for driving a plurality of coils of a speaker, the converter outputting a digital data in accordance with a voltage of the drive power source, and a monitor circuit detecting a state of the plurality of coils of the speaker based on digital data output by the time to digital converter.
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