Method and system for DC offset cancellation from a...

Demodulators – Frequency modulation demodulator – Having specific distortion – noise or other interference...

Reexamination Certificate

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C327S307000

Reexamination Certificate

active

11115199

ABSTRACT:
Provided are a method and system for removing an offset direct current (DC) component from an input waveform. The method includes multiplying the input waveform with a demodulation waveform to produce a first differential current signal. An absolute value representation of the demodulation waveform is multiplied with a reference DC offset value to produce a second differential current signal. The first and second differential current signals are then differenced.

REFERENCES:
patent: 6032028 (2000-02-01), Dickey et al.
patent: 6642767 (2003-11-01), Wang
patent: 2003/0109241 (2003-06-01), Kim
patent: 2003/0138034 (2003-07-01), Shi et al.
patent: 2004/0106380 (2004-06-01), Vassiliou et al.
patent: 2005/0248478 (2005-11-01), Ling

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