METHOD AND APPARATUS FOR WIDE-BAND PHASE GRADIENT SIGNAL ACQUISITION

摘要

The present disclosure facilitates capture of biosignal such as biopotential signals in microvolts, or sub-microvolts, resolutions that are at, or significantly below, the noise-floor of conventional electrocardiographic and biosignal acquisition instruments. In some embodiments, the exemplified system disclosed herein facilitates the acquisition and recording of wide-band phase gradient signals (e.g., wide-band cardiac phase gradient signals, wide-band cerebral phase gradient signals) that are simultaneously sampled, in some embodiments, having a temporal skew less than about 1 μs, and in other embodiments, having a temporal skew not more than about 10 femtoseconds. Notably, the exemplified system minimizes non-linear distortions (e.g., those that can be introduced via certain filters) in the acquired wide-band phase gradient signal so as to not affect the information therein.

主权项

1. An apparatus comprising:
two or more biosignal acquisition channels, each biosignal acquisition channel comprising a gain amplifier configured to amplify biopotential signals received from an associated surface electrode placed on a patient to generate a wide-band cardiac phase gradient signal, wherein each biopotential signal is amplified without filtering that causes distortion in the generated wide-band cardiac phase gradient signal above about 1 kHz, each output of the two or more biosignal acquisition channels feeding an analog-to-digital conversion circuit that simultaneously samples, each of the two or more biosignal acquisition channels to generate a wide-band cardiac phase gradient signal data stream.