METHOD, CIRCUIT AND INTEGRATED CIRCUIT FOR DETECTING RESONANCE FREQUENCY
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United States of America Patent
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Issued Date -
Dec 4, 2014
app pub date -
May 30, 2014
filing date -
May 30, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method, circuit, and integrated circuit for detecting resonance frequency is disclosed in which a first operational amplifier circuit receives an input signal and provides an output signal for a resonance circuit to store energy, a zero crossing comparator circuit samples a discharge current of the resonance circuit and transforms the sampled current into a sampled voltage and outputs a square signal to a digital signal processor based on the sampled voltage, and the digital signal processor obtains a resonance frequency based on the square signal.
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