Apparatus and method for removal of sinusoidal noise from a...

Details Apparatus and method for removal of sinusoidal noise from a... Apparatus and method for removal of sinusoidal noise from a...

H - Electricity

03

H

328/0.3

H03H 17/02 (2006.01) H03H 11/04 (2006.01)

Patent

CA 1176318

APPARATUS AND METHOD FOR REMOVAL OF SINUSOIDAL NOISE FROM A SAMPLED SIGNAL ABSTRACT An apparatus and method for removing signal fre- quency sinusoidal noise from an analog signal is disclosed, The filter apparatus utilizes A Program- mable Gain Amplifier (PGA) as an input to a discrete sine wave generator to control the amplitude and phase of the discrete sine wave generator. The output of the latter, after being full live rectified, controls the gain of the PGA so that its output! when appropriately phase shifted, cancels sinusoidal noise from a sampled analog signal. The apparatus is particularly adapted to cancelling 60 cycle noise from electrocardiogram (ECG) signals. The filtering approach can be implemented on a programmed general purpose digital computer and the method steps for achieving filtering of single frequency noise from an analog signal are disclosed.

398547

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