Abstract: The present disclosure provides systems and methods for signal processing and detection for pacemaker pulses. Systems and methods can activate an analog-to-digital converter based on detecting a leading edge of a pacemaker pulse. Such use of the analog-to-digital converter may allow a system to operate at a lower power and with more specificity than certain other systems.

Abstract: A sensor module for a wearable vital sign monitoring device is disclosed. The sensor module includes a substrate having a first side and a second side opposite the first side. The sensor module also includes a sensor die mounted to the first side of the substrate. The sensor die is configured to monitor a vital sign of a user. The sensor module further includes a waterproof coating that conformally covers the sensor die, at least a portion of the first side of the substrate, and at least a portion of the second side of the substrate.

Abstract: Vital sign monitors are plagued by noisy photoplethysmography (PPG) data, making it difficult for the monitors to output consistently accurate readings. Noise in PPG signals is often caused by motion. The present disclosure provides improved techniques for reducing motion-related artifacts in optical/PPG measurements for vital signs monitoring. In general, techniques described herein are based on using measurements of reference sensors that include sensors other than optical sensors used for the optical measurements, e.g., biopotential sensors, bioimpedance sensors, and/or capacitive sensors. In particular, techniques described herein aim to filter PPG signals using substantially only the noise components of signals generated by reference sensors, by attenuating or altogether eliminating components of the signals generated by reference sensors which are indicative of the parameter the reference sensors are designed to measure.

Abstract: Vital sign monitors are plagued by noisy photoplethysmography (PPG) data, making it difficult for the monitors to output consistently accurate readings. Noise in PPG signals is often caused by motion. The present disclosure provides improved techniques for reducing motion-related artifacts in optical/PPG measurements for vital signs monitoring. In general, techniques described herein are based on using measurements of reference sensors that include sensors other than optical sensors used for the optical measurements, e.g., biopotential sensors, bioimpedance sensors, and/or capacitive sensors. In particular, techniques described herein aim to filter PPG signals using substantially only the noise components of signals generated by reference sensors, by attenuating or altogether eliminating components of the signals generated by reference sensors which are indicative of the parameter the reference sensors are designed to measure.

Abstract: A sensor module for a wearable vital sign monitoring device is disclosed. The sensor module includes a substrate having a first side and a second side opposite the first side. The sensor module also includes a sensor die mounted to the first side of the substrate. The sensor die is configured to monitor a vital sign of a user. The sensor module further includes a waterproof coating that conformally covers the sensor die, at least a portion of the first side of the substrate, and at least a portion of the second side of the substrate.

Abstract: A method and a circuit for increasing a resolution of a digitally controlled oscillator include controlling the oscillator so that an output signal of the oscillator varies between semi-periods having a first frequency and semi-periods having a second frequency. The method and circuit further include applying the output signal of the oscillator as an input to a divider to obtain a divided signal. A frequency of at least one semi-period of the divided signal is a function of both an oscillator semi-period having the first frequency and an oscillator semi-period having the second frequency.

Abstract: A method and a circuit for increasing a resolution of a digitally controlled oscillator include controlling the oscillator so that an output signal of the oscillator varies between semi-periods having a first frequency and semi-periods having a second frequency. The method and circuit further include applying the output signal of the oscillator as an input to a divider to obtain a divided signal. A frequency of at least one semi-period of the divided signal is a function of both an oscillator semi-period having the first frequency and an oscillator semi-period having the second frequency.

Abstract: An illuminated display assembly comprising a display plate having an illumination source connected thereto wherein a supporting frame and/or shield structure is opaque but includes non-opaque portions defining predetermined words, letters or like indicia. The illumination source may be selectively actuated to illuminate the display plate causing light to be transmitted or directed through the non-opaque portions of the shield structure thereby providing an illuminated display of the non-opaque formed indicia.