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US 12,551,155 B1Granted
Electrocardiogram sensing and processing
AssigneeArrowhead Center, Inc.
InventorsWei Tang, Xiaochen Tang
Life of this patent
Estimating the term…
Abstract
Real-time electrocardiogram (“ECG”) monitoring system for wearable devices. Embodiments of the invention are based on parallel Delta modulator architecture with local maximum point and local minimum point algorithms to detect QRS and PT waves. The parallel Delta modulators preferably convert ECG signals to two channels of three-state Delta modulated bitstreams. Using embodiments of the invention, real-time PR and RT intervals, as well as ST segment measurements, can be achieved in long-term wearable ECG recording devices.
Claims5
An electrocardiogram sensing and processing apparatus comprising:
- a second-order Delta modulator circuit configured to subtract an integrated feedback voltage from an electrocardiogram signal and to generate a delta voltage, wherein the second-order Delta modulator circuit comprises a parallel Delta modulator circuit which comprises a pair of second-order Delta modulator circuits arranged in parallel with one another such that a first Delta modulator circuit of said pair of second-order Delta modulator circuits is configured to process a bit stream from a QRS wave and a second of said pair of second-order Delta modulator circuits is configured to process a bit stream from a PT wave;
- and
- non-transitory computer-readable media comprising a digital logic algorithm stored thereon, said digital logic algorithm configured to provide delineation to extract at least a plurality of fiducial points from the electrocardiogram signal during analog to digital conversion comprising Delta modulated bitstreams.
Dependencies are inferred from the claim text.