DEVICE AND METHOD FOR GENERATING DRIVING SIGNAL OF LOUDSPEAKER
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United States of America Patent
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Issued Date -
Jul 2, 2015
app pub date -
Jun 13, 2014
filing date -
Dec 31, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and device for generating a driving signal of a loudspeaker is provided. The method includes the steps of: outputting a driving voltage to a loudspeaker; measuring a current flowing through the loudspeaker; calculating to derive a voltage value corresponding to the current flowing through an electrical impedance of the loudspeaker, and calculating to derive a back-emf value by performing subtraction according to the driving voltage or a corresponding value thereof and the voltage value; integrating the back-emf value to derive an integrating value positive-correlating to a displacement of the diaphragm of the loudspeaker; and manipulating the driving voltage according to the integrating value to perform protection on the loudspeaker.
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