Abstract: In at least one example of the present disclosure, a portable electronic device includes a housing, an internal volume within the housing, a port having a perimeter defined by the housing, the port in fluid communication with the internal volume and an external environment, a water deflector disposed inside the housing adjacent to the port, the water deflector extending at least a length and a width of the port, and openings disposed in the water deflector. The openings in the water deflector are aligned outside of the perimeter of the port.

Abstract: Disclosed herein are systems and methods for using a digital power amplifier controller (DPAC) having forward-loop correction and feedback-loop correction. In an embodiment, the DPAC receives, via an analog-to-digital converter (ADC), a digital power-measurement signal from a power sensor coupled to an output of a power amplifier. The DPAC adjusts (e.g., linearizes) the digital power-measurement signal using a measurement-correction function for the sensor, and uses the adjusted digital power-measurement signal to generate a digital feedback signal, which the DPAC uses to generate a digital power-control signal that reflects a desired power level at the output of the power amplifier. The DPAC adjusts (e.g., linearizes) the digital power-control signal using a control-correction function for the power amplifier, and outputs the adjusted digital power-control signal via a digital-to-analog converter (DAC) to a power-control node of the power amplifier.

Abstract: Disclosed herein are systems and methods for using a digital power amplifier controller (DPAC) having forward-loop correction and feedback-loop correction. In an embodiment, the DPAC receives, via an analog-to-digital converter (ADC), a digital power-measurement signal from a power sensor coupled to an output of a power amplifier. The DPAC adjusts (e.g., linearizes) the digital power-measurement signal using a measurement-correction function for the sensor, and uses the adjusted digital power-measurement signal to generate a digital feedback signal, which the DPAC uses to generate a digital power-control signal that reflects a desired power level at the output of the power amplifier. The DPAC adjusts (e.g., linearizes) the digital power-control signal using a control-correction function for the power amplifier, and outputs the adjusted digital power-control signal via a digital-to-analog converter (DAC) to a power-control node of the power amplifier.

Abstract: A system for securing a shoe, of the type having an upper part with a pair of opposed edges with eyelets which are drawn together in securing the shoe, onto the foot of a wearer is disclosed. In a preferred embodiment the system comprises an elastic shoelace having a pair of ends, each end having an elongated, covering of an elastomeric material, and a dual cord fastener adapted to allow shoelace ends to pass there through and to lock two prescribed points on the length of the shoelace from moving relative to the fastener.