METHOD, CIRCUIT AND INTEGRATED CIRCUIT FOR DETECTING RESONANCE FREQUENCY

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United States of America Patent

APP PUB NO 20140354261A1
SERIAL NO

14291609

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Abstract

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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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Patent Owner(s)

Patent OwnerAddress
FAIRCHILD SEMICONDUCTOR CORPORATION5005 E MCDOWELL ROAD MAILDROP A700 PHOENIX AS 85008

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Huang, Lei Beijing, CN 286 2136
Meng, Na Beijing, CN 14 46

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