Apparatus and method for selectively driving a piezo transducer
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United States of America Patent
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Sep 3, 2013
Grant Date -
Oct 14, 2010
app pub date -
May 27, 2010
filing date -
Nov 29, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Devices and methods are provided for selectively driving a piezo transducer to operate as a pressure pattern detector or an alarm generator. In one embodiment, there is provided a device that includes: a piezo transducer; a comparator coupled to the transducer and a reference voltage; and a pressure pattern recognition circuit coupled to a comparator output of the comparator. The pressure pattern recognition circuit may be configured to: (i) determine whether the pressure pattern satisfies a predetermined condition; and (ii) in response to the pressure pattern satisfying the predetermined condition, generate an output signal.
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