Piezoelectric buzzer driving circuit
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United States of America Patent
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-
Sep 20, 2011
Grant Date -
Oct 9, 2008
app pub date -
Oct 24, 2007
filing date -
Apr 6, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A piezoelectric buzzer driving circuit (200) for driving a piezoelectric buzzer (211) with two terminals includes a reverser (216). The reverser includes an output terminal and an input terminal (24) configured for receiving a controlling signal to control an output of the reverser. The two terminals of the piezoelectric buzzer respectively connected to the input terminal and the output terminal such that a D-value of the voltage across the piezoelectric buzzer is twice as large as the voltage of the controlling signal.
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