Feed-forward filtering device and associated method
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United States of America Patent
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Feb 19, 2019
Grant Date -
Sep 7, 2017
app pub date -
Feb 6, 2017
filing date -
Mar 1, 2016
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Abstract
A filtering device includes a low-pass filter (LPF), a noise estimation circuit and a first combining circuit. The LPF receives and filters a pre-filtering signal to generate an output signal of the filtering device. The noise estimation circuit estimates an estimated noise signal according to the output signal and the pre-filtering signal. The first combining circuit subtracts the estimated noise signal from an input signal of the filtering device to generate the pre-filtering signal.
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