US Patent 7706222 Demodulator, disk drive device, and demodulation method
Patent 7706222 was granted and assigned to Sony on April, 2010 by the United States Patent and Trademark Office.
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A demodulator for demodulating an input signal including a predetermined modulated signal includes a multiplication fundamental wave generator for outputting a multiplication fundamental wave for the predetermined modulated signal, a calculator for multiplying the multiplication fundamental wave by the input signal and for integrating the multiplication result, a demodulated signal generator for generating a demodulated signal of the modulated signal using the output from the calculator, a phase determiner for determining a cross-phase state of the input signal and the multiplication fundamental wave on the basis of a balance of levels of a plurality of integrated values, obtained as the integration result, for an interval containing the modulated signal in the input signal, and a phase adjuster for adjusting a phase of the multiplication fundamental wave to be supplied to the calculator on the basis of the determination result of the phase determiner.
US Patent 07706222 Demodulator, disk drive device, and demodulation method US Patent 7706222 Demodulator, disk drive device, and demodulation method
US Patent 07706222 Demodulator, disk drive device, and demodulation method
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